An expert who has achieved level 2 by getting 100 points
An expert that got 10 achievements.
An expert that got 5 achievements.
An expert whose answer got voted for 100 times.
Re: How do I adjust the throttle body
The throttle bodies on most newer cars are not adjustable for its idle speed. If the Check Engine Light is on, go to the nearest auto parts store and get them to pull the error codes from your car's computer. Post the codes back here and we can give you a better answer to your question
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
In theory once the desired idle speed is programmed into the management system, in the absence of such faults as air leaks, sticking idle air control valve and suchlike it should be impossible for the idle speed to be much different from the programmed value because the ECU should continue closing down the amount of air bypassing the throttle butterfly until the idle is around the correct value.
I think you need to go back to basics and double-check the work to ensure everything is as it should be. In the absence of mechanical faults and ignoring the possibility of electronic problems a high idle must be caused by too much air entering the engine, either because the idle air control valve is not closing properly or because the throttle butterfly is not closing fully.
It is worth noting air can enter the intake through leaky diaphragms, split vacuum hoses or faulty pcv systems. It is also worth checking the egr valve if fitted.
Unfortunately many car manufacturers don't like it when people do it themselves, so they have a little b**by-trap they like to spring on you. If you replace the TPS, IAC, etc, the idle will many times no go back to normal and you will need to have the computer "relearn" so it can rest it back to normal! No real reason for them to design it this way, except of course to force you to go to the dealer to get it fixed! Nice little surprise they like to give their customers!
there is a set screw in the front of the throttle body, to adjust it, but first why do you need to adjust it ?
if low idle then it could be your TPS or IDLE AIR CONTROL VALVE, this valve is on the back of the TB and should be cleaned first, take the two.screws out which are torx heads and I think.a 25, once you have it out, take TB cleaner and a non lint towel and spray and clean, also clean the port where it sits in to, on these Dodges they are known for these to be carboned up, this would give low or high idle, also check to see if you have your 5volt reference on this sense, the TPS and crank sense, this one is hard to get to, it sits on top of your transmission bell housing on pass side.
before you go touching the.idle set screw, check these and clean.idle air control valve first
Have you tried to adjust the idle itself to bring it down? The adjustment should be right on the throttle body where the gas pedal is connected to the throttle body. There should be a screw that will allow you to adjust the idle up or down. If you loosen the screw it will take your idle down
The low idle and wanting to stall is caused by a dirty throttle body, it needs to be cleaned thoroughly front and back sides using throttle body cleaning spray. Also while doing the cleaning, disconnect the battery to reset the computer so it will relearn to the newly cleaned throttle body.
the ecu drives a unit called an idle airspeed controller.if there is a vacuum leak,the computer will have the idle speed too high.
the IAC is a motor driven valve that controls airflow into the throttle body.it is common for idle speeds in the range of 1400rpm instead of 800 in this situation.
check the air filter,the throttle body cleaned,and the IAC has to be free moving.
also make sure that your coolant temperature sensor is accurate or the computer will think the engine is cold and keep the idle really high.
pretty sure that year is throttle body fuel injected if so check idle air control switch may be stuck or passage may need to be cleaned cylinder shape located on throttle body but first check all vacuum hoses for leaks or cracks