Low speed/RPM shudder - 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 02-25-2006, 02:44 PM   #1
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Default Low speed/RPM shudder

Hi everyone, sorry to ask a question that I am sure has already been asked. I have a 1994 SSE, it runs great with 129k on it. In the past 5 years I've owned it I have replaced the starter, alternator, fuel pump and filter, battery other misc. items and just today I replaced all the plugs (went through the wires and they are all fine). Thanks to reading all the other posts from the rest of you on this board I did not buy the Bosch plugs...THANKS! The issue that I have is that when I am going through a parking lot at a low speed I feel the car shudder. There doesn't seem to be any problem with this at highway speeds since I replace the plugs this morning. After they were replaced I did a 1.5 hours highway ride with the cruise set between 76-79mph, not an issue what so ever. I went to local grease shop and had the oil change and checked out the trans oil and it is fine, no discoloration or dirt/metal chunks. Not sure what else to do or to look at, hopefully it is one of those little, quick fixes.
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Old 02-25-2006, 04:51 PM   #2
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I had the same problem with my 99 SE a few months back, I replaced the plugs and wires now she runs and idles smooth. But you said your wires were fine so, I gues this won't be much help, sorry.
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Old 02-25-2006, 05:12 PM   #3
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It would help to know : Is it a deceleration shudder or acceleration.
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Old 02-25-2006, 07:57 PM   #4
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It is a little shudder if I am going through a parking lot at a steady, slow speed, say 5 or 7 mph. If I hit the gas it is fine, it'* only at that slow speed as I drive. All other speeds seem fine. I am not even sure if it is something I should worry about, to me it'* more bothersome than anything. Actually the car runs like it did when it was new. I bought it off my mother so I know the full history of it.
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Old 02-26-2006, 03:15 AM   #5
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What is the idle speed when you are cruising the parking lot at 5-7mph?
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Old 02-26-2006, 06:26 AM   #6
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I had a very similar problem on my 94.....cleaning the maf sensor *carefully* resolved the issue completely.
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Old 02-26-2006, 12:44 PM   #7
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Could you describe to me what the maf sensor is and where it is?
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Old 02-26-2006, 12:48 PM   #8
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Quote:
Originally Posted by lebrunkevin
Could you describe to me what the maf sensor is and where it is?
Definition: A device used in many fuel injected engines to measure the amount of air entering the engine so the computer can control the air/fuel mixture. Located ahead of the throttle body, the MAF sensor uses a heated wire or filament to measure airflow.

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Old 02-26-2006, 09:10 PM   #9
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I have that exact same problem but it does not happen all the time, just occasionally usually when I am going about 5 mph or coming to a slow stop from 15 or 10 mph.
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Old 02-26-2006, 10:01 PM   #10
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MAF - Mass Air Flow Sensor, which does what Bandit posted it would do.
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