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Old 06-20-2013, 08:23 AM   #1
96SS10SS
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2010 SS misfiring after rain/moisture in air

I'm at the dealer now for the second time this week related to misfires...

Background:

June 10 brought heavy rain to the Philly area. When I started the car the morning after the rain, June 11, it began misfiring. I shut it off and restarted it a few times and eventually it set the code and lit the check engine light. It ran ok for a few days but it resurfaced later in the week. I took it in Monday June 17 and they reported a #3 misfire and replaced the plug and wire.

Yesterday morning it rained on my way into work and when I started it at the end of the day, it began misfiring. I made an appointment immediately.

I came out this morning and there was dew on the cars. I started it up and drove to the dealer while it misfired the whole time.

The service guy just came out and said the #3 cylinder is misfiring along with random misfires in the rest of that cylinder bank. They called a technical service line and found out that there are some issues with valve springs but that wouldn't relate to misfires involving moisture. They are going to try swapping coil packs now.

Everything I have found about Camaro misfires relates to either the V6s or Fourth Gens.

Has anybody had moisture related misfiring issues with a bone stock LS3?
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2010 2SS/RS LS3 built October 30, 2009
SLP retro badges
MGW shifter with Race Knob
Hotchkis TVS Stage 1 (coils and sways)
Pedders Street Z bushings and steering bushing
3.91 Gear swap
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Old 06-20-2013, 10:47 AM   #2
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Quote:
Originally Posted by 96SS10SS View Post
I'm at the dealer now for the second time this week related to misfires...

Background:

June 10 brought heavy rain to the Philly area. When I started the car the morning after the rain, June 11, it began misfiring. I shut it off and restarted it a few times and eventually it set the code and lit the check engine light. It ran ok for a few days but it resurfaced later in the week. I took it in Monday June 17 and they reported a #3 misfire and replaced the plug and wire.

Yesterday morning it rained on my way into work and when I started it at the end of the day, it began misfiring. I made an appointment immediately.

I came out this morning and there was dew on the cars. I started it up and drove to the dealer while it misfired the whole time.

The service guy just came out and said the #3 cylinder is misfiring along with random misfires in the rest of that cylinder bank. They called a technical service line and found out that there are some issues with valve springs but that wouldn't relate to misfires involving moisture. They are going to try swapping coil packs now.

Everything I have found about Camaro misfires relates to either the V6s or Fourth Gens.

Has anybody had moisture related misfiring issues with a bone stock LS3?
Hello 96SS10SS,

I am sorry your having misfiring issues with your Camaro. I understand the frustration you must have. You mentioned that you are back at the dealership. I would appreciate an update on the progress made as I would like to make sure this issue is resolved for you. If there is any assist I can lend along the way, be sure to let me know.

Reggie B.
Chevrolet Customer Care
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Old 06-20-2013, 11:16 AM   #3
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Thank you, Reggie. I will post any results.
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2010 2SS/RS LS3 built October 30, 2009
SLP retro badges
MGW shifter with Race Knob
Hotchkis TVS Stage 1 (coils and sways)
Pedders Street Z bushings and steering bushing
3.91 Gear swap
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Old 06-20-2013, 11:48 AM   #4
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I just found this post, http://www.camaro5.com/forums/showthread.php?t=150509, but it doesn't help since mine is a trouble code situation.

To clarify the above: the check engine light has been flashing and the car has been running rough during the misfire periods. I know this is bad for the catalytic converters among other things.
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2010 2SS/RS LS3 built October 30, 2009
SLP retro badges
MGW shifter with Race Knob
Hotchkis TVS Stage 1 (coils and sways)
Pedders Street Z bushings and steering bushing
3.91 Gear swap
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Old 06-20-2013, 02:36 PM   #5
96SS10SS
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I just received a call from the Service Dept. They tried swapping coils and the problem remained at #3. They opened up the valve cover and found a broken valve spring. They're not sure what role the moisture played in the misfire.
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2010 2SS/RS LS3 built October 30, 2009
SLP retro badges
MGW shifter with Race Knob
Hotchkis TVS Stage 1 (coils and sways)
Pedders Street Z bushings and steering bushing
3.91 Gear swap
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