Question about 2002 Toyota Tacoma

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2002 toyota tacoma throttle body/High RPM @ Idle

Sitting in drive with brake applied, truck tried to rev just slightly. RPMs increased just a touch. Check engine light comes on says throttle body sensor/switch error. Yada Yada. How do I go about cleaning the throttle body and fixing the problem. Thanks

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6ya6ya
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Posted on Jan 02, 2017

Pointnino
  • 14 Answers

SOURCE: check engine light on 2003 toyota tacoma, O2 sensor?

An O2 sensor code is a tricky one. It could mean SEVERAL different things, and I know how bad it sucks to hear this, but your best bet is to take it in and have a diagnostic ran on it at either a dealer or a good mechanic shop with a computer they can hook up to it. I had an "O2" code come up a while back on another car I used to have, and literally spent weeks and hundreds of dollars trying to fix it, and never did. Finally out of desperation took it in, paid the $90, and they found the problem and fixed it in like 30 minutes. Something I would have never even thought of was causing it (can't remember off the top of my head). After that I stopped wating time and money on check engine lights. One comes on in my car, I take it to have it ran for free at and auto parts store just to make sure it's not a loose gas cap or something, just to get an idea of what I'm looking at, then go and make an appointment to have to hooked up to a diagnostic computer to track down the problem. Good luck, and hope this helps save you some time and money.

Posted on Apr 05, 2010

  • 42 Answers

SOURCE: 2005 toyota tacoma check engine light

pull the E.F.I. fuse located under the hood on the drivers side, if there is more than 1 efi fuse pull them both along with the E.T.C.S. fuse (if there is one) for 1 minute or so. That should do it

Posted on Dec 23, 2008

ourhowse
  • 2007 Answers

SOURCE: when car sitting in idle the engine management

Try changing the fuel filter.

Posted on Jun 07, 2009

ourhowse
  • 2007 Answers

SOURCE: 1997 Toyota Camry 4 cyl., When driving it stalls

Get a timing light and check it.If the mark is jumping all over the place, your belt has jumped a cog and will need to be replaced.

Posted on Jul 20, 2009

greezy_je208
  • 237 Answers

SOURCE: cold engine, idle rpm 1200 is this normal? 2002 Toyota Carollia

you need to replace the throttle position sensor on the intake.

Posted on Dec 16, 2009

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I just bought a 2010 buick enclave cxl and on slight incline in drive will roll back. ? Its like the rpms arent where they should be. I don't think the weight should pull it back so much. Thanks


The parking brake is the way to stop it rolling back. Idle RPM are set and have no bearing on how the car rolls back. apart from if you increase the revs, the car will move. The proper procedure on an incline is to apply the parking brake, put the vehicle into drive, increase the revs and take off the parking brake. Just like we did in the old days when we had manual gearboxes :>)

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Revs high


If the idle speed is normal until you shift into a gear, the idle air control valve is probably raising the idle speed. Try unplugging the iac motor at idle then shift into drive.
If the IAC is raising the RPM the computer controls it, so for some reason the computer thinks the RPM needs to go up. I am assuming you do not have a check engine light on or you would have checked for trouble codes.
Just for the record, I am showing the same IAC for both transmissions on a 2.0 engine code 3.
Is it possible the battery was disconnected and the learn process needs to be done for the computer to know where normal idle speed is ?

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After cleaning the throttle body it looks to be stuck and RPM remain above 2000 when idling. Engine accelerates and decelerates going back to idling at about or above 2000 RPM.


When you cleaned the throttle body, did you remove the Idle Air Control valve/motor (IAC)? A dirty or defective IAC can be the result of your problems. The IOAC regulates your vehicles idling under various condictions. Try cleaning it first then replace if needed.

Please remeber to rate this solution. Thanks!

Feb 05, 2011 | 2002 Toyota Tacoma

1 Answer

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There could be several issues causing this problem. For one, I assume you meant 2000 rpm, not 20000 as the engine would have expired before reaching that number.

Checking the computer codes on this would be the safe thing to do as the Throttle Position Sensor could have failed or is sending the incorrect information to the ECU. Another possible issue to look for is a failure of the throttle return, if memory serves there should be a spring on the backside of the throttle body. If the spring is broken or missing, this could leave the throttle open enough to increase the rpm. I would also check the throttle body/throttle blade for dirt. Normally a dirty blade results in a decrease of rpm but it might be possible that it is sticking and not closing as it should. There are special throttle body cleaners available - do not use carb or brake cleaner as they could damage the throttle body. Let me know if any of the above helps.

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Idle is factory set and cannot be adjusted, your best bet is checking for cracked hose pipework for air intake at idle,(not at problem under exceleration and driving) Any slight upset to the air /fuel ratio will be most prevelent at idle speeds.Check hoses where the meet metal flanges on manifold intakes and any sharp bends in ppipes.Good luck

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TAKE THE AIR CLEANER OFF THE INLET MANIFOLD LOOK DOWN THE THROAT AND SEE WHERE THE BUTTERFLY IS SITTING YOU WILL SEE WHERE YOU ADJUST THE IDLE,YOU ADJUST THE IDLE SPEED BY BY TURNING THE STOP PLATE ADJUSTING SCREW TO INCREASE RPM SCREW IN TO DECREASE RPM SCREW OUT__ NOW !!!BE SURE TO ....LOCK THE ADJUSTING SCREW WITH THE LOCKNUT I THINK THAT IS WHERE YOU TROUBLE WILL BE ...

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Will idle high sometimes up to 3000 rpms when driving or sitting still


I have the same Jeep and same problem. The engine was running rough. The Jeep dealer fixed a vacum problem in the manifold and they then decarbonized and cleaned the fuel injectors. After these repairs the idle problem began, it would spike to 2000 rpm while sitting at idle, sometimes it would slowly come down, sometimes I would have to tap the accelerator. I took it back in and they then replaced the throttle motor and reprogrammed the PCM (Power Control Module?) Still same problem. Now they suspect a another vacuum leak and I am taking it back in on Tuesday, will let you know what happens, $ 1,300 so far.

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