C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Very Rough 89

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Old Aug 11, 2011 | 07:39 AM
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Default Very Rough 89

One of those things that goes bump in the night apparently got to my vehicle while I was sleeping last nite.

I started it to drive to work this morning after it sat in the garage for a week and it shook, rattled and smoked. It has been running great up to today.

Its one of those situations that it is running so poorly that I don't even know where to start. Would condensation in the gas be the cause?

Your thoughts would be appreciated.

Thanks
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Old Aug 11, 2011 | 08:11 AM
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The only time something like that happened to me, it was because a mouse had chewed through ignition wires.. You can hook up a scanner and also check for codes.. You may also want to disconnect the battery cable for a few minites to reset the ecm, this will reset everything, sort of like rebooting your home computer when it loads wrong......Good Luck......WW
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Old Aug 11, 2011 | 08:22 AM
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If it is running that bad fault codes are most likely set. Pull codes and post them here. "Resetting" the ECM will very likely not help.
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Old Aug 11, 2011 | 09:13 AM
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Originally Posted by LT1 Rocker
One of those things that goes bump in the night apparently got to my vehicle while I was sleeping last nite.

I started it to drive to work this morning after it sat in the garage for a week and it shook, rattled and smoked. It has been running great up to today.

Its one of those situations that it is running so poorly that I don't even know where to start. Would condensation in the gas be the cause?

Your thoughts would be appreciated.

Thanks
I drive mine on the weekends only and never had a condensation problem from weekend to weekend, may be bad gas? I'd check fuel pressure at the rails first.
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Old Aug 11, 2011 | 10:10 AM
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Originally Posted by Muffin
If it is running that bad fault codes are most likely set. Pull codes and post them here. "Resetting" the ECM will very likely not help.
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Old Aug 12, 2011 | 09:16 AM
  #6  
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Default Update

I started the ole girl when I arrived home from work last night and she ran fine without any of the issues experienced that morning. I can only guess that she got up on the wrong side of the bed and was cranky.
Just for jollies I dumped some drygas in. Drove it to work today and it ran fine.

Go figure!

Thanks much for your feedback.
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