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Rough Idle in El Salvador

I have a 98 Tacoma 4X4 with 96,000 miles, automatic, 4 cylinder. It runs great, but when I stop at a traffic light, etc., it idles rough. Does not seem to be a low idle. I usually put it in neutral and it helps a little. I'm not tech savvy with the newer automotive electronics (was shocked to find there was no distributor!) so please keep it simple. Also, as a missionary in El Salvador, the technology to test and qualified mechanics are rare if they exist at all. Please advise.

Reply to
ElBob
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First thing to check would be plugs and wires, how long sinse the last tune-up? You may just need the throttle body cleaned, if it has never been done before.

Reply to
Mike

I changed the plugs, air and fuel filters and it did not seem to have any affect. If it we back in the 70's I would suspect a vacuum problem. Does this seem likely? When accelerating it runs fine, no hesitation, etc.

Reply to
ElBob

A vacuum leak may be a possibility. On fuel injected cars a small vacuum ussualy will cause an increase in idle speed as the computer is able to compensate to a small degree. A large leak would likely cause a hesitation and may turn on the check engine light. You can check for a vacuum leak by spraying carb cleaner at the intake gaskets and vacuum lines. You will notice a change in engine rpm's if you find the leak. You may need to hook it up to a decent scan tool that will let you read the sensor values while the vehicle is running to determine what is wrong.

Reply to
Mike

Seems to be a universal truth.

Reply to
JustinW

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