intermittent rough running/idle
Thread Starter
Cruising
Joined: Jun 2002
Posts: 10
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From: Mechanicsville MD
intermittent rough running/idle
My recently purchased 91 has an intermittant rough idle and at about 50 miles per hour will run rough, hit the gas and it seems to stop. have already replaced the center cat,the erg and the computer. It still does it but not as often and not as bad. Help :confused: :confused:
Le Mans Master
Joined: Mar 2001
Posts: 7,999
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From: Life is just one big track event. Everything before and after is prep and warm-up and cool-down laps
Cruise-In III Veteran
Cruise-In IV Veteran
St. Jude Donor '12
Re: intermittent rough running/idle (chuck91)
I can't remember which engine you have so the following may not apply.
My 88 (L98) had a stumble and bad idle until I replaced plugs, wires, cap, rotor, and coil. I also took off the throttle body and cleaned it completely. Put it all back together and now it runs better than ever and real smooth at idle.
You might want to start at the throttle body - take it off and clean it up real good.
Good Luck
:cheers: :cheers: :cheers:
My 88 (L98) had a stumble and bad idle until I replaced plugs, wires, cap, rotor, and coil. I also took off the throttle body and cleaned it completely. Put it all back together and now it runs better than ever and real smooth at idle.
You might want to start at the throttle body - take it off and clean it up real good.
Good Luck
:cheers: :cheers: :cheers:
Pro
Joined: Dec 2001
Posts: 715
Likes: 0
From: NYC NY
Re: intermittent rough running/idle (jaa1988)
Check that the iac and minimum idle is set correctly along with tps voltages. You can find instructions in the tech section. You might also want to see if you maf sensor is working correctly. Unplug it, and if it runs better, that is probably your problem. Sometimes just tapping it while it is plugged in can tell you also, but sometimes neither of these methods will work if the problem is very intermittent.
good luck
good luck
