LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

My whole car shakes when I accelerate

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Old 07-19-2005, 01:07 PM
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My whole car shakes when I accelerate

It just started today. Pulling out of my driveway my car shook, at first I thought I was getting clutch chatter for the first time ever for some reason, but it kept on shaking. It does it warm or cold, at any amount of gas I give it, even at WOT. I already have 120 miles on this tank of gas, so I know its not bad gas, and the injectors only have ~1K on them. And if I hold it at a steady RPM, sometimes it backfires a little bit. Any idea what it could be? It drove perfectly up until today... Oh yeah, theres no SES light, and I'm getting 0 KR....

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Old 07-19-2005, 01:31 PM
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Re: My whole car shakes when I accelerate

Seems like plug/wires to me.
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Old 07-19-2005, 06:20 PM
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Re: My whole car shakes when I accelerate

It doesn't feel like plugs/wires though, it's not a miss, it feels mechanical.....
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Old 07-19-2005, 06:22 PM
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Re: My whole car shakes when I accelerate

Sounds like a miss to me.
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Old 07-19-2005, 06:41 PM
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Re: My whole car shakes when I accelerate

My friend said it feels exactly the same as his did when he broke rocker arm studs and pushrods so I'm gonna pull the vavle covers first and take a quick look...
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Old 07-19-2005, 06:45 PM
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Re: My whole car shakes when I accelerate

Originally Posted by speed_demon24
My friend said it feels exactly the same as his did when he broke rocker arm studs and pushrods so I'm gonna pull the vavle covers first and take a quick look...
A miss is a miss, whether caused by ignition related problems or non-functioning valves. The ignition is the more common.
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Old 07-19-2005, 06:49 PM
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Re: My whole car shakes when I accelerate

Originally Posted by shoebox
A miss is a miss, whether caused by ignition related problems or non-functioning valves. The ignition is the more common.
Wouldn't I get an SES light if its from the ignition though?
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Old 07-19-2005, 06:56 PM
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Re: My whole car shakes when I accelerate

not necissarly (sp?) when my opti blew chunks, i got no SES light at all, nothing, just a ****-poor running car :dunno:
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Old 07-19-2005, 07:13 PM
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Re: My whole car shakes when I accelerate

Well I pulled the valve covers and everything is fine. So are these the symptoms of a bad opti?
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Old 07-21-2005, 08:36 PM
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Re: My whole car shakes when I accelerate

Well I was chaing my plugs and found a burnt plug wire, so I ordered some new OVC wires so hopefully that will solve my problem...
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Old 07-22-2005, 02:24 AM
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Re: My whole car shakes when I accelerate

I just fixed mine today. It was the plugs.

Similar problem to yours. my problem began with a faint misfire while driving. as the days went by it felt as if it was droppin a couple of cylinders when it was cold... got worse in the next two weeks. it would only run good when fully warmed and little gas.. if I gave her 15 percent throttle it would drop a couple of cylinders and shake... it would return back to normal if I would back out on the gas.

I scanned her and noticed the left bank had a problem. Changed only the left side plugs and fired her up. She came alive and Kickin again.


I will take her for a spin tomorrow and see if the problem is gone for good. so far she is alive again.


Marvin

Last edited by MentalCaseOne; 07-23-2005 at 08:32 AM.
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Old 07-23-2005, 08:29 AM
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Re: My whole car shakes when I accelerate

update.

Yep. It was the plugs. After a full day of driving my problem is gone.

She drives so smooth again I am tempted to go for a drive just because.

Marvin
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