Rough Idle Problem,,,,,
Thread Starter
Le Mans Master
Joined: Jul 2001
Posts: 6,795
Likes: 221
From: Remember what the dormouse said.....
Rough Idle Problem,,,,,
My '87 seems to be idling very rough from time to time. Almost like it is searching for an idle speed.
Funny thing is, it doesnt do it all the time, and I cant MAKE it do it either. It just seems to happen randomly.
When I am driving it, it seems ok, it only happens when its idling.
Any ideas?
Funny thing is, it doesnt do it all the time, and I cant MAKE it do it either. It just seems to happen randomly.
When I am driving it, it seems ok, it only happens when its idling.
Any ideas?
Drifting
Joined: Aug 2000
Posts: 1,251
Likes: 0
Re: Rough Idle Problem,,,,, (Thomas)
First try some fuel injector cleaner & good gas to clean them up.check there connectors.
It could be so many things,dirty air or fuel filter,leaking EGR,PCV valve,fuel pressure,worn timing chain,...
It could be so many things,dirty air or fuel filter,leaking EGR,PCV valve,fuel pressure,worn timing chain,...
Racer
Joined: Jul 2000
Posts: 421
Likes: 0
From: Glen Burnie Md
Re: Rough Idle Problem,,,,, (Thomas)
Thomas,
Same thing happened to my '86 earlier this year. I contacted the forum, and one of the suggestions that I believe helped me the most was the suggestion to be sure to clean my throttle body. After removing the clamps, holding the Mass Air Flow Sensor...I was able to see how much 'carbon' had built up in the throttle body...potentially causing the rough idle I was experiencing. I used some 'STP carb cleaner', a tooth brush, and a clean rag...and went to work. Results: a much smoother idle. Took about 1-1/2 hours. Give it a look.
Good Luck!! John
Same thing happened to my '86 earlier this year. I contacted the forum, and one of the suggestions that I believe helped me the most was the suggestion to be sure to clean my throttle body. After removing the clamps, holding the Mass Air Flow Sensor...I was able to see how much 'carbon' had built up in the throttle body...potentially causing the rough idle I was experiencing. I used some 'STP carb cleaner', a tooth brush, and a clean rag...and went to work. Results: a much smoother idle. Took about 1-1/2 hours. Give it a look.
Good Luck!! John
