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What may cause it?

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Old Dec 2, 2004 | 01:56 PM
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St. Jude Donor '03-'04-'05-'06-'07-'08
Default What may cause it?

I just recently have replaced the oil pressure sensor.
So I took off the injectors and the whole intake.
After putting everything back together, the car runs weird.
When I first start up and drive it, it runs really hesitating like something stuck in the exhaust. When the engine gets warmed up for about 20 - 25 minutes of driving, it starts going away and getting better but still there.
What may cause the symtom?
Intake manifold gaskets?
I will take everything back off again and redo it to make sure I got everything right.
Thanks,
-Mike
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Old Dec 2, 2004 | 03:27 PM
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You don't have to remove the injectors from the manifold just unbolt the manifold and move it to the side.

Sounds like you have a loose connection, go back over everything that was disconnected and recheck everything.
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Old Dec 2, 2004 | 04:53 PM
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PLEASE list all codes that are storred. Once you list and post them clear them and see what ones come back. that will give us a better idea as to what is happening. There is a ground wire on the back of the engine. Is it properly connected?

Bill C
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Old Dec 2, 2004 | 05:16 PM
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St. Jude Donor '03-'04-'05-'06-'07-'08
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Originally Posted by Bill Curlee
PLEASE list all codes that are storred. Once you list and post them clear them and see what ones come back. that will give us a better idea as to what is happening. There is a ground wire on the back of the engine. Is it properly connected?

Bill C
I have checked all the codes and they are just old same codes.
I will list them tonite.
Do I touch that ground wire when remove the manifold?
The reason I have to remove the injectors because I was lazy to remove the fuel lines so I remove all the injectors and swing them aside.

The problem is weird because if the weather is not that cold (above 60 degrees), my car running kindda fine

Thanks for all quick responses and I will post the code tonite.

-Mike
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Old Dec 2, 2004 | 05:57 PM
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Had this happen on a previous car, non-vette. Turned out to be a crack in the manifold gasket. Hard to see but it was the cause. Symptoms were similar. FWIW.
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Old Dec 2, 2004 | 06:02 PM
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St. Jude Donor '03-'04-'05-'06-'07-'08
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Originally Posted by sjc*2
Had this happen on a previous car, non-vette. Turned out to be a crack in the manifold gasket. Hard to see but it was the cause. Symptoms were similar. FWIW.
You meant intake manifold or exhaust manifold?
If you meant intake manifold then it maybe the case because all of my 8 gaskets were from my old LS1 intake manifold.
Thanks for your info.
-Mike
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