Car runs rough when raining.
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Staging Lane
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From: College Station,Tx
Car runs rough when raining. I had a question about my SS. When it rains I have noticed my car runs really rough. At idle its feels like someone is just rocking my car side to side, it never dies and my throttle response is fine. I get out of the rain or it stops and my car goes back to normal. Is this a known issue with these cars or is something else maybe going on? I'm running stock headers as well.
Last edited by 3rdDegreeBurns; Jul 20, 2008 at 11:21 PM. Reason: forgot something.
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Staging Lane
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From: College Station,Tx
I would say, this has always done this to me for as long as I can tell and I've had the car for 2 years. My car is pretty much stock except for a lid,k&n filter, and have accordion style connection to the tb. I do know sometimes my SES light kicks on when this happens but goes away after it stops raining sometimes.
Launching!
Joined: Oct 2007
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be careful if you have an air induction box you could be suckin up water. same thing would happen to me when it was raining and it would always correct it self though....exept for one time in which it blew a rod all the way through the block. i replaced it with a new ls1 and someone totaled it a week after it was installed while the car was parked
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From: Indianapolis
Your O2 sensors may be getting wet/leaking and messing with them. Make sure your coil pack connector harness is firmly inserted into it's socket. Also check out your wires and make sure they look decent and not touching anything other then the spark plug. I'd try to get the code off of the PCM and it'll help you pin point it for you. Might be able to replicate it with a spray bottle. I doubt water is getting all the way up your airdam, past your airfilter and past the TB connector, if it is that is an impressive air intake.
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Staging Lane
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From: College Station,Tx
lol thanks for the advice i'll try to look at these this weekend but as far as 02's I made sure those suckers were in there when I replaced them. I will try the bottle thing as well.
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Staging Lane
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From: College Station,Tx
i believe the codes were p0174 and 171, bank 2 & 1 being lean. Replaced a pcv hose that had a hole in it, clean maf, and my water pump went out after that the code has not come back. Have not checked them after it rains and it comes on.
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Staging Lane
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For the 1/2 horsepower you might pick up using a K&N filter, you are letting more crap go into your engine, they are not worth it. Just get a paper A/C Delco filter, your engine will have much better protection and you will never feel any performance difference and your ET at a track will be identical.
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Your codes point to o2 sensor issues, I think. Maybe its the sensors or maybe you need to check to make sure the wires are in good shape under there. It makes sense that if they are frayed, when rain hits them you will have problems.
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Staging Lane
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From: College Station,Tx
These are the old codes, I have changed all 4 since then and the 171 went away but the 174 did not, but that went away after I changed the pcv valve that had a hole in it.
