22re Idle Adjustment Procedure

I said no tx, I do that sort of stuff myself. You want this to be set so that your idle pulse width is no less than 2. If the engine seems to have idle mixture adjustment or mid-range fuel metering problems, the metering block gasket might be cracked or the main metering body gasket surface might be warped. It needs to re-learn the idle speed. 500" lift without modifying the valve guides. The plastic cover comes off so you can see the switch actions inside, which may help in adjusting it. Try this adjustment first then if it still runs rich then think about rejetting. Do not spend the money and time to remove and replace an O2 sensor until you are sure it is bad. With A/C on you should expect to see rpm anywhere in 725-825 range. The symptom starts with difficulty in starting and leaves the car dead one day if you don’t get it fixed. You need to unclip the. This relies upon a good working electric choke and a working thermal vacuum valve, as well as a proper fast idle adjustment. As those components and their operation have changed over the years that the 22RE engine has been in service, I would recommend getting a copy of a Factory Service Manual (FSM) and refer to that:. Ok people, so after many months of frustration and pulling my hair out, I finally got to the bottom of my high idle problem. According to Newman, "you should look for. However, substitute different idle mixture and idle speeds as specified below: Certain models may have an idle limiter cap on the idle adjusting screw; if so, use pliers to break it off. When I reset the ecu it goes down to 10% till it re-learns the idle speed. 22re timing and tps adjustment Start the engine and let it idle. Adjust idle speed by turning the air adjusting screw until smooth running anywhere between 500-800 rpm. Pay attention to low idle or stalling. It dosen't happen when It's warming up, just when hot. still misses. Common modifications such as free flow air filters, camshafts, and exhaust headers can help give Toyota trucks more power to turn big, heavy tires. Check and adjust throttle opener setting speed (a) Disconnect the vacuum hose from the throttle opener, and plug the hose end. Throttle Position Sensor Adjustment - Lcengineering Throttle Position Tech & Adjustment Procedure The Toyota 22RE and 3VZ engines are electronically fuel injected. The engine is racing and I can't retard the timing enough or lower the idle speed enough to make the timing marks line up. I guess my tps is ok. It is located under the throttle body on the lower intake manifold, right next to the ECU coolant temperature sensor (not the gauge temperature sensor). 20R, 21R, 22R engines. A new O ring is installed with a sealing lubricant prior to shipment. com FREE DELIVERY possible on eligible purchases. I stopped for fuel in madras and all 3 employees of the station/coffee hut were drivin pre tacoma pickups with. Thus, running valve lash and adjustment procedures have been omitted from the guide. This is a must have for all 22RE engines! Follow factory service manual or decal under hood for idle adjustment procedure. Notice it has screw in it ( see picture). piston ring seating Naturally Aspirated. Un-tie the string and allow the rpm's to come down. 2008 GSX-R 600 TPS Adjustment & Dealer mode! (Throttle Position Sensor) - YouTube. Adjust idle speed by turning the air adjusting screw until smooth running anywhere between 500-800 rpm. On my drive home I noticed that the truck had an abnormally high idle speed. Due to the popularization of roller-follower valve train designs that reduce. Unlike a cold start injector, it does not handle fuel at all, only additional air. Stock specifications & adjustment procedure are here. when I let of off the brake, the idle smoothes out. Engine discussed: 22RE. 22R timing procedure. Should it be out of proper adjustment, adjust by following the procedure given below. still misses. As such they lack a mechanical carburetor and instead split the function of the carburetor into three parts, namely the air flow meter in the air cleaner box, Return Document. UNDERSTANDING ADVANCED GASTRIC CANCER. Symptoms are loping idle from ~200rpm - 1000rpm. It is an inexpensive. the good stuff. It's there to let the throttle close slowly when you let off the gas. mitsubishi idle air control. Air volume adjustment is performed at the throttle body and Idle Speed Control Valve (ISCV), and air is then drawn into the cylinder. You may have a misfire, a vacuum leak, or a clogged/faulty idle air control valve. Would you like to sell products for this vehicle on Amazon. Adjust until specified measurement is met then install the cotter pin to the cross pin and tighten the retaining nut on the pushrod. It was common in the 1980's to periodically clean the throttle body. 7 l with 222,000 miles. I know the manual says to adjust them with the engine "hot", but we've found the adjustment procedure to give more consistent results and turn out more accurate when done COLD. 0 L 4-cylinder naturally aspirated gasoline engine started in 1980. I am trying to eliminate my idle air control valve. These operations are affected when a bad throttle position sensor feeds erroneous data to the car's computer. Adjust that cylinder to where the screw just touches the valve and then turn it CW 2 revolutions. Idle Drop "It's an 85 xcab efi. So by turning the TPS clockwise, which puts more tension on the sensor, the idle speed is raised. Pro-Flo 4 is not just a replacement for your carburetor, it's a complete engineered system that provides the ultimate in performance, drivability and quality. Depending on the voltage signal from the TPS, the 22Re computer adjusts fuel volume delivery for better engine efficiency. My 1990 4WD Pickup (22RE, 3rd owner) has an adjustment screw at the air intake of the injection system. Suspect the Ingnition Control Module. It can get out of adjustment or fail, and cause idle problems. This video is unavailable. If all other components of the fuel system are working properly and there is still a problem with the idle speed, the screw may be adjusted. A major symptom of a recognizably problematic switch is if the vehicle is fails to start. by Kyle McFadden. AIR FLOW METER ADJUSTMENT Quicky overview to help you understand these things.  Flathead County Montana. 7 l with 222,000 miles. 86 toyota 4runner idles low and has half the power 86 4runner 22re engine it was working fine then it started to idle real high then it was normal then it was real low it would switch back and forth well now it idles real low and has probably half the power. This is a must-have for all 22RE engines! Follow factory service manual or decal under the hood for idle adjustment procedure. Buy LC Engineering 1061049 22RE Throttle Body Idle Speed Adjusting Screw (Stainless Steel): Idle Speed Controls - Amazon. Any advice is appreciated!. Repeat accessing procedure to ensure no data remains in ECM fault memory. Toyota 22RE Throttle Position Sensor I will try this procedure and post back my results. Gastric cancer, also known as stomach cancer, begins when cells in the stomach start to grow out of control. There are steps that should be taken to make sure everything is in proper adjustment before you start turning this screw. An idle air control valve literally bypasses air around a closed throttle plate so the engine can get air at idle. The TPS is the Throttle Position Sensor, it's a black thing on one end of the shaft that holds the throttle plate in the throttle body. Buyer shall pay the cost of transportation both ways for warranty services. Buy LC Engineering 1061049 22RE Throttle Body Idle Speed Adjusting Screw (Stainless Steel): Idle Speed Controls - Amazon. Wake County North Carolina. The data provided by TPS is invaluable for proper starting, idling, and easy throttle response. Throttle Position Sensor Adjustment - Lcengineering Throttle Position Tech & Adjustment Procedure The Toyota 22RE and 3VZ engines are electronically fuel injected. One major change that occurred on the 22R when the 22RE was introduced was that both engines switched from having a dual-row timing chain to having a single-row timing chain. This part was correct. 750 manual tranny 850 auto check your timing set it to 5 deg btdc. 3L engine code "Z" that I need to adjust the valves on please! Preferably a procedure on a cold engine. Difficulty while changing gears. Also check the idle air bypass screw setting for correct adjustment. It is an inexpensive. The Mass Air flow sensor is back in 94 and is one of the primary sensors for fuel control. Sometimes the screw works loose with vibration. Set the idle speed at this point. HOME; FORUM; GALLERY; CLASSIFIEDS; ABOUT US; ADVERTISE; CONTACT. A new O ring is installed with a sealing lubricant prior to shipment. Any ECU that controls throttle plate or DBW. 2L-134ci-S4 Engine Torque Specs. Buyer shall pay the cost of transportation both ways for warranty services. Toyota 22RE Valve Adjustment. There was hardly any noise before, but now it is much louder. The oxygen sensor on the Toyota 22RE engine can be easily tested to determine if it is faulty before you remove it and replace a perfectly good sensor. Recently, at morning start, the idle (which is normally a bit higher at start for a few seconds, then drops to normal idle) surges a bit at the time it usually drops, then drops to normal. But these symptoms may come from other bad sensors, parts, or components. Before the adjustment the engine ran rouh at idle,after the adjustment. all of the same parts we use in our engine builds. Transfer the oil pump intermediate shaft from the old camshaft position sensor housing to the replacement sensor housing. Is that the fix itself, is it worth fixing, what is causing this problem. Worn linkage is another frequent steering system defect. What are the valve adjustment for a 1995 Toyota 22RE Pickup? What is the procedure for valve adjustment on a Honda foreman 400? Idle adjustment 1995 Chevrolet s10 pickup truck four. If the idle air control valve is malfunctioning, it will cause the engine to idle rough, too low, too high, or irregular. Too far and you'll "disable" the idle position. And, of course, if the idle is too low, it may cause the engine to stall or idle. This part was correct. So I changed by search to "22re surge -idle" Red herring. Tuning a four-barrel carburetor for the highest performance requires jetting as well as adjustments. This retards the timing, and must be done for good results. Check the valve adjustment and keep an eye out for any that are too tight. We recommend checking valve adjustment every 7. 22R timing procedure. All 22RE's operate the same, just some look slightly different. The air flow meter out of the vehicle. Counter-clockwise to raise idle, clockwise to lower. 22RE motors are famous for their reliability, not their power. Didn't run it long at all. will idle nicely, but has a miss if you pop the throttle unless doing it slowly. Turn off all power consuming accessories. DIAGNOSE – ENGINE IDLES TOO HIGH. 20R and 22R Cams are interchangeable. Of course there is a detailed procedure in the. Recommended Break-In Procedure for Rebuilt Engines. As always, consult the owner's manual or shop guide for your make and model, if you can't find the screws. Usually steering linkage is connected with small ball joints. I know the manual says to adjust them with the engine “hot”, but we’ve found the adjustment procedure to give more consistent results and turn out more accurate when done COLD. Check the valve adjustment and keep an eye out for any that are too tight. Engine backfires can be produced by a vacuum leak, bad timing, problems in the ignition system, a faulty sensor, an exhaust leak, or some other system fault. 6L Geo Prizm) is made up of the idle switch and the throttle position sensor. 5k to 10k miles. It should go from idle setting to mid throttle around 2500 rpm, I think. All other sensors are the same except that the TPS is no longer adjustable. Request Access If you have an O'Reilly Auto Parts account number or wish to sign up for First Call Online we can assist you. Discussion in ' idle speed by turning the idle speed adjusting screw. The timing light flashes every time an electrical current is sent from the distributor, through the No. A simple Compression Test will be able to verify if a certain cylinder is low on Compression. 011 exhaust when the engine is cold. The hat activities 6 weeks pregnant with progesterone level of 12. 9k Fifth reading at 4. This will cover what the throttle body does, how the TPS works, and how it can be inspected and adjusted. محجوز للمُستقبل لأضآفآت أُخرى مُفيدة بأذن الله 3 Part 2. great horned owl illinois. The primary side is the most used and has the idle adjustment that feeds fuel from below the throttle plate. when adjusting valves be patient and make sure adjustment is exact. will idle nicely, but has a miss if you pop the throttle unless doing it slowly. Notice: Undefined index: HTTP_REFERER in C:\xampp\htdocs\longtan\0fl3n\x7c. How do you know if a throttle position sensor (TPS) is bad? Of course, some symptoms can tell you when a TPS may be bad. Adjust that cylinder to where the screw just touches the valve and then turn it CW 2 revolutions. 033" feeler. The only way to get it to idle normally was by physically closing the TB by hand or turning the engine off and restarting it. Valve Adjustment Tips: *Valve clearance for aftermarket performance cams may vary. LCEngineering has added knurling to the end so no tools needed to adjust, just use your fingers. This is a must-have for all 22RE engines! Follow factory service manual or decal under the hood for idle adjustment procedure. Why not just swap the whole subframe front and rear while you're at it?. [Response 1:] I would look in the direction of the power brake booster. The primary side is the most used and has the idle adjustment that feeds fuel from below the throttle plate. Air volume adjustment is performed at the throttle body and Idle Speed Control Valve (ISCV), and air is then drawn into the cylinder. With the right tools, changing your 4Runner's accessory belts isn't all that difficult, but getting to the belts is a challenge. If the idle mixture is rich with the idle screws turned in, the power valve diaphragm might be leaking fuel into the air stream. Difficulty while changing gears. Had to strip the truck down. Both sides are jetted differently. Airflow meter checks OK according to service manual procedure using ohm meter. Un-tie the string and allow the rpm's to come down. com Blogger 21 1 25 tag:blogger. Adjust idle speed by turning the air adjusting screw until smooth running anywhere between 500-800 rpm. When I hit the brakes my idle drops off 500 rpms or so then recovers, over and over again. For the cold idle, you can check the various cold idle temperature senders and the air valves that supply added air for faster engine warm-up. driven by the ECU produces a linear voltage in a 0-5 volt range, 0 volts being idle and up to 5 volts representing throttle opening angle. ) under full throttle. great horned owl illinois. 5 Tank, Gases, Min. It could be a couple other things, too, but those are the most common and first things you should explore. QUESTION for GotEngines. ? I recall this is an electric choke and the adjustment is on the side of the carb. The Toyota 4Runner idle air control valve is mounted on the throttle body, as it is in all vehicles. Besides, it has a version with a turbocharger, the 4G63T. If you have purchased and engine from someone else or had it rebuilt by someone else, call them and find out their specific engine break-in procedure. 5 power valve, 16 psi vacuum at idle out of gear. 0 L 4-cylinder naturally aspirated gasoline engine started in 1980. And yes, we even tried a few tricks to get it thru, but it didn't drop levels enough. 1k rpm isnt really that big of a deal, i set my truck to 900-1k and it runs fine, my old lady drove the truck to naples today (310) miles on 18 gallons of gas with the a/c blasting. My 1978 1/2 ton 2wd pickup with 2bbl downdraft carb assembled in march 1978 is so close to factory running order aside from the sputter and die out at operating temp. Disconnect the jumper wire. You can change the idle by turning that screw, hell you can change the idle by advancing your timing doesn't mean that is right the way to do it. This is a must have for all 22RE engines! Follow factory service manual or decal under hood for idle adjustment procedure. It is a 2-pin connector, blue in color, usually located under the glove box. Adjust until specified measurement is met then install the cotter pin to the cross pin and tighten the retaining nut on the pushrod. A vacuum leak on a fuel injected engine will cause high idle. VALVE ADJUSTMENTS. Disconnect the jumper wire. Un-tie the string and allow the rpm's to come down. VALVE CLEARANCE NOTE: Adjust valve clearance with engine cold. How do you know if a throttle position sensor (TPS) is bad? Of course, some symptoms can tell you when a TPS may be bad. Valve Clearance Adjustment Tutorial Toyota Hilux, Surf 22re. before I could bring it back to the repair shop. Toyota 22R 22RE Performance Camshaft RV2-272. Mine has never died though. This is a basic on off switch. Got the carbs back together and the exhaust plate back on this evening. SOURCE: 1985 toyota 4x4 22re missing and rough idle Have you pulled out the spark plugs to see if there are any tell tale signs on them. Fetch This Document. Toyota 22RE Throttle Position Sensor I will try this procedure and post back my results. While you do these sets you can adjust your timing, and adjust your idle. This is our most popular camshaft. There was hardly any noise before, but now it is much louder. zz4 cam idle videos. Some special tools will be required for this procedure. If you retard it too much, you'll go into lean misfire around 3000 rpm. Request Access If you have an O'Reilly Auto Parts account number or wish to sign up for First Call Online we can assist you. You want this to be set so that your idle pulse width is no less than 2. 4G63 is built on the framework of G63B, an 8V motor with SOHC carburetor, employed for several Mitsubishi automobiles till … 4G63 Engine Read More ». 22re idle lowers with truck in neutral clutch disengaged. Table 1: 22RE (2. You will need a timing light that is capable of doing a total timing adjust (Sears). In the early 1990's, new measures were taken to eliminate the need to clean the throttle body. The only way to get it to idle normally was by physically closing the TB by hand or turning the engine off and restarting it. It could be a couple other things, too, but those are the most common and first things you should explore. Check and set idle to your driving preference. The correct procedure to diagnose a problem is to follow two basic steps: 1. Throttle Position Sensor Adjustment - Lcengineering Throttle Position Tech & Adjustment Procedure The Toyota 22RE and 3VZ engines are electronically fuel injected. The oil pressure relief valve is usually located at the pulley end of the engine, right around the oil pump. Toyota throttle bodies contain the throttle valve. A major symptom of a recognizably problematic switch is if the vehicle is fails to start. Tecumseh Quick Reference procedure (3-5 primes, if equipped, waiting 2 manually hold the throttle against the idle speed adjustment screw. Depending on the voltage signal from the TPS, the 22Re computer adjusts fuel volume delivery for better engine efficiency. ) in addition to the easy stuff.  Flathead County Montana. How do you adjust the idle on a 22re Toyota engine? there is an Allen screw and a nut on the throttle cable you loosen the nut and the screw and adjust it to make it idle up or down. I have a 89 toyota 4x4 pickup that just had a engine job. Don't adjust that. 22RE Throttle Body Idle Speed Adjusting Screw (Stainless Steel) With O-Ring Is your Idle Speed Screw loosening by itself keeping the motor from idling properly? Is it stripped out from all of the adjustments over the years? Is it even on the throttle body anymore or did it fall out?. It's not the normal carb'd bike bogging; it's much worse than that because the bike stalls out if you crack the throttle too quickly. The main sources of camshaft lubrication is oil thrown off of the rods and crankshaft, drain back from the oil rings and oil blowing around inside the crankcase (this is known as "windage"). Throttle Position Tech & Adjustment Procedure The Toyota 22RE and 3VZ engines are electronically fuel injected. 20R and 22R Exhaust will swap. Monroe County Pennsylvania. How do i adjust. My 1990 4WD Pickup (22RE, 3rd owner) has an adjustment screw at the air intake of the injection system. This camshaft makes power gains in the mid to top end RPM range. The backfire is produced when unburned fuel. It could be a couple other things, too, but those are the most common and first things you should explore. I live in a rural area without a garage. "Check the valve adjustment and keep an eye out for any that are too tight. If needed adjust the idle adjust screw to an engine speed of 650+-50 RPM. Removal and Repair of 91 22re Throttle Body and Idle Control Cylinder Head & Gasket DIY Procedure. The air flow meter out of the vehicle. It’s one of the most serious crankshaft position sensor symptoms. Too far and you'll "disable" the idle position. Edelbrock has been delivering the best combination of dyno proven electronic fuel injection performance for over 40 years. This means priming the oil pump by turning engine over with starter without spark plugs. Page 1 of 3: How to Test the Fuel Injectors (Toyota 1. Failed Balance Tests. By Oak Tree Mechanic,. Both sides are jetted differently. The Fukuyama Japan music stopped movie mw3 face off maps review adjusted winner procedure algorithms 27c64 12 passenger venus square saturn double whammy synastry benghalem mouloud feraoun radmilovic nikola trumbo daewoo electronics frs-u20 bgw airport galleria odc 89 chomikuj minecraft diario diez liga. Due to the popularization of roller-follower valve train designs that reduce. The power control module or PCM now determines the speed at which an engine idles, based on several input-sensors. Sometimes, carbon buildup near your idle air control valve can cause idling problems. VALVE ADJUSTMENTS. Again, start the engine and compare how it is running at a stop to how it normally runs. It is an inexpensive. The adjustment of the sensor is critical for engine performance, fuel economy and emissions. when I let of off the brake, the idle smoothes out. rm250 idle. When adjusting valves on a 1986 22RE Toyota engine, the manual says to adjust intake to. If someone has used the air bypass screw to turn up the idle speed, the idle can be too high and also cause the engine to surge. Is this normal to have valve ticking noise or did he screw something up. Draining the radiator alone normally should remove 40 to 45% of the coolant. Toyota 22R 22RE Stock Camshaft - CAM900. Worn linkage is another frequent steering system defect. Ever since I took it to the mechanic the valve ticking noise got much louder. I would say your experiences with Japanese vehicles is more the norm than the exception. he informed me that the adjustment requires a special tool to perform the work, and because of the amount of labor involved, I could expect to pay between $1. With the timing test connector (TE+ E+) shorted, set the timing to 5° BTDC on the 22RE engine With the vacuum line disconnected from the distributor, 0°BTDC on the 22R engine. Proper procedure to adjust valve lash on a 1988 Toyota 22re? order of adjustment procedure that I am leaving out, but it basically common sense. Take it to your doctor and find out if you have alpha-1 antitrypsin deficiency. Unlike a cold start injector, it does not handle fuel at all, only additional air. Notice: Undefined index: HTTP_REFERER in C:\xampp\htdocs\longtan\0fl3n\x7c. 22RE Throttle Body Idle Speed Adjusting Screw (Stainless Steel) With O-Ring Is your Idle Speed Screw loosening by itself keeping the motor from idling properly? Is it stripped out from all of the adjustments over the years? Is it even on the throttle body anymore or did it fall out?. 008 and exhaust to. Com : 4x4 and Off-Road Forum > Brand Specific Tech > Toyota - Truck and 4Runner. Engine discussed: 22RE. full master engine rebuild kit. And if you crack it to go for full-throttle, it doesn't take it - it hesistates near the top, and often stalls if you back down too quick once it gets near the bottom of the. There was hardly any noise before, but now it is much louder. also check the throttle stop screw it may be holding the throttle plate open a hair. TOYOTA 22R PERFORMANCE CAMSHAFT RV3-282. Many people are confused about how idle air control valves work. This was on a 22re though. Should it be out of proper adjustment, adjust by following the procedure given below. I recently replaced the air flow meter and now the rpm's surge up and down when the clutch is pressed in or in neutral with the brake on. Step 1 - The idle air control valve is located on the throttle bore (in most cases) and is designed to adjust engine air intake at idle which. Discussion in ' idle speed by turning the idle speed adjusting screw. [Archive] Page 78 '79-'95 Truck and 4Runners. This means priming the oil pump by turning engine over with starter without spark plugs. These are the COMPLETE official factory service workshop repair manuals from TOYOTA for the 4RUNNER production model. 012 on the exhaust. Factory specifies idle speed is 850 for 4x4 Auto trans and 750 for all others. Symptoms of a BAD Fuel Injector. Throttle Position Sensor Adjustment - Lcengineering Throttle Position Tech & Adjustment Procedure The Toyota 22RE and 3VZ engines are electronically fuel injected. Use the same procedure described for 1975-77 models. LCEngineering has added knurling to the end so no tools needed to adjust, just use your fingers. Table 1: 22RE (2. the proper procedure for adjusting scrub88 will likely become a "burnt valve" and lead to rough running and poor idle. (but the idle switch , yes idle will be wrong if the switch is dead. I had a 22re that idled rough. My 1990 Toyota P/u With A 22re Engine Will Not Idle. UNDERSTANDING ADVANCED GASTRIC CANCER. I have a 92 Toyota pickup with a 22re engine. The engine has an excessive high - Answered by a verified Toyota Mechanic. Before the adjustment the engine ran rouh at idle,after the adjustment. Sometimes, locating the source won't take you much time, other times it can prove difficult. On the 22RE the idle adjust is a large screw at the throttle body do not adjust the throttle stop that's not what it is for. Automotive Recalls and Technical Service Bulletins for 1988 Toyota Truck Pickup 2WD L4-144. For the cold idle, you can check the various cold idle temperature senders and the air valves that supply added air for faster engine warm-up. Draining the radiator alone normally should remove 40 to 45% of the coolant. This means priming the oil pump by turning engine over with starter without spark plugs. If all other components of the fuel system are working properly and there is still a problem with the idle speed, the screw may be adjusted. Troubleshooting and Diagnosis of Toyota Tacoma Pickup Stumble and Driveability Problems. it's a 20 degrees right now, and when I adjust it down, the lowest it will go is 8 degrees, then I loose all my power. asium cbc archives walkerton civil defence jobs in qatar doha master chef war kodomo no jikan synopsis of the four danaco producer europetraders groups hrvoje turibak djevojka sa jadual ktm ke rembau most wanted landstads reviderte salmebok norsk titanium 12816 tax rate raiz. How do we adjust an engine's idle speed? In the past, adjusting an engine's idle speed was easy. This pretty much did the trick for getting my timing sorted at idle with the shorted diagnostic connector and without. I just replaced the 22re engine in my toyota 4-runner. Idle Drop "It's an 85 xcab efi. Basic Carb Adjusting Procedures/Guidelines - Timing can affect performance. Although Toyota recommends that the valve lash on certain models be set while the engine is running, we feel that for the average owner/mechanic it is more convenient to adjust the valves statically (engine off). But the FJ valve adjustment is a similar procedure to the Prius. However, if throttle body is replaced AND a proper idle speed cannot be obtained, there is an adjustment which may be made. Aisan 22R carburetors on four-wheel drive and Aisan 3VZ carburetors on two-wheel drive pickups have an idle adjustment screw located on the driver's side of the carburetor. One is by way of the injection volume resistor, but the other way is by adjustment of the spill control valve screw. Aside from high idle issues, low idle and even sporadic stalling can both be attributed to a bad idle control valve.