92 bonnie lopes at idle - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-08-2011, 06:41 PM   #1
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Default 92 bonnie lopes at idle

ok here is the deal my car was doing fine till i washed the engine off today when ,after i got it home, i decided to check and make sure i got the thing clean cause my car is the one being looked at this week. as its idling i notice a slight lope and you can hear an even slighter whoomp noise from the exhaust. are there any problems common to the 93 bonnies that could cause this or will i just have to find out by proccess of elimination
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Old 03-08-2011, 06:51 PM   #2
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What did you use to wash the engine? You may have gotten the coils wet. A lope to the idle can be cause by a vacuum leak, it'* also possible you knocked a vacuum line loose.
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Old 03-08-2011, 09:17 PM   #3
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i used the car wash no one here can steam clean it i also forgot to add my wife said it has been doing it for three days but it only became feelable today
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Old 03-08-2011, 09:24 PM   #4
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I would start with looking for a vacuum leak. Spray some carb cleaner around the vacuum lines with the engine running. If the RPM changes then you found a vacuum leak.
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Old 03-08-2011, 10:39 PM   #5
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ok will do thanks
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Old 03-08-2011, 10:50 PM   #6
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ok went out and started the car and it ran fine no loping or whoomp noise does that help narrow it down some
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Old 03-08-2011, 10:57 PM   #7
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If it'* all better now, then it sounds like something got wet. If you would like to try a experiment, take a spray bottle with water and mist the coils, and plug wires with the engine running. Turn off the lights and watch for blue flashing. That would be a short.
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Old 03-08-2011, 11:04 PM   #8
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i would like too but the instructors wont let me do that at school and i havent figured out how to turn off the sun yet(no garage)

thanks for the info though
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