Miss fire codes
03-08-2010, 11:13 PM
#11
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Join Date: 03-31-2009
Location: Michigan
Posts: 76
Not sure I would wait. but any rate. HHR went back in today. same code. the GM engineer is now working with the dealership tech so hopefully this will be the end of it. They pulled the computer and have it in the freezer and the car in the warmth of the shop. I am betting they find and issue with the #3 driver circuit in the computer. I will let you know what they find.
03-17-2010, 12:21 PM
#12
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Join Date: 03-31-2009
Location: Michigan
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the computer tested out fine. so now a GM engineer has been assigned to the problem. Supposedly this is the only SS in the country that has the problem.
update
Get this the GM engineer has suggested a new computer. Funny part is this is what I recommended before the injectors. ARGH!!! if this fixes it I will be contacting GM Techline myself.
update
Get this the GM engineer has suggested a new computer. Funny part is this is what I recommended before the injectors. ARGH!!! if this fixes it I will be contacting GM Techline myself.
11-17-2010, 10:49 AM
#13
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Join Date: 03-31-2009
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resurect
Sorry to bring this back out but may as continue with the original thread.
From the last time, in April the dealership put new springs in the "new head" because in their great wisdom they only swapped the parts. duh. so pulled everything back apart. Northern Michigan also warmed up. So fast forward to this morning at a 35 deg and raining and guess what check engine light is on again. My bet is Cylinder #3 misfire. Has anyone had a similiar issue with this car that I could convey before the boneheads decide the transmission needs to be replaced......... you know what I am saying here.
From the last time, in April the dealership put new springs in the "new head" because in their great wisdom they only swapped the parts. duh. so pulled everything back apart. Northern Michigan also warmed up. So fast forward to this morning at a 35 deg and raining and guess what check engine light is on again. My bet is Cylinder #3 misfire. Has anyone had a similiar issue with this car that I could convey before the boneheads decide the transmission needs to be replaced......... you know what I am saying here.
11-17-2010, 01:44 PM
#16
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Join Date: 03-31-2009
Location: Michigan
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they narrowed it to only #3 by swapping plugs, coils and wires. So far the parts replaced in order have been. New #3 injector and seall for the other 3, Head w/ new #3 valves, Computer and valve springs. the concern is it is always #3 cylinder thus the focus. the thought on the head was a hanging valve.
11-17-2010, 01:48 PM
#17
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Join Date: 03-31-2009
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Crazy thing is it only does it at start up in the colder weather. but seemingly cold and damp is the initial trigger, but as it starts to remain cold it will do it either damp or dry.
the previous owner had the same problem just before and after going into storage. I dont' store it for the winter unless you consider it spent 4 months at the dealer last winter. we get 6 so it is saving on the effect of the road salt. LOL
the previous owner had the same problem just before and after going into storage. I dont' store it for the winter unless you consider it spent 4 months at the dealer last winter. we get 6 so it is saving on the effect of the road salt. LOL
11-17-2010, 01:52 PM
#18
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Join Date: 07-23-2008
Location: Peoria, AZ
Posts: 1,148
My Misfires were caused by low compression "Failed Rings" in all cyl's. Number 3 was the worse. I think there is a defect with the rings. I also heard this before.
ever since the rebuild, no issue other than the wiring problem with the Stage Kit which I fixed. Have them do a compression check.
ever since the rebuild, no issue other than the wiring problem with the Stage Kit which I fixed. Have them do a compression check.