2012 Z06 Misfire
#21
Intermediate
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Here’s the latest: All codes pointed to #4, so new #4 injector; plug wire, plug and coil pak. Picked it up at dealer after 3 days. Driving it home, service engine light came in again. Idle acted up a bit, but nowhere near as bad. Catalytic converter code. So new catalytic converter. So far, so good. But, car hunts at idle. My friend’s Z06 (a 2011) idles rock steady. My 2008 Z06 idle was rock steady as well. Has anyone had any issues with the idle hunting by about 50-100 RPM? Is it something unique to the 2012 LS7? It has done this since day one at 3 miles. (Maybe I am just being paranoid now as I don’t want to be stranded again.)
#22
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Here’s the latest: All codes pointed to #4, so new #4 injector; plug wire, plug and coil pak. Picked it up at dealer after 3 days. Driving it home, service engine light came in again. Idle acted up a bit, but nowhere near as bad. Catalytic converter code. So new catalytic converter. So far, so good. But, car hunts at idle. My friend’s Z06 (a 2011) idles rock steady. My 2008 Z06 idle was rock steady as well. Has anyone had any issues with the idle hunting by about 50-100 RPM? Is it something unique to the 2012 LS7? It has done this since day one at 3 miles. (Maybe I am just being paranoid now as I don’t want to be stranded again.)
What dealership fixed it for you? Maybe take it to another? Classic Chevy in Sugarland has a good shop.....maybe try them.
#23
Intermediate
I am still of the opinion you have an issue with the ECU or wiring harness.
If the issue was constant, I would agree it could be mechanical. Of course, at this point, I would have them do a compression and leak down test of every cylinder to show me the engine was healthy.
If the issue was constant, I would agree it could be mechanical. Of course, at this point, I would have them do a compression and leak down test of every cylinder to show me the engine was healthy.
#24
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On way to dealer, dropped a cylinder or two again, foot to the floor - 30 mph max. backfiring etc. No service engine light came in. Car now has 322 mph - mostly from service driving it. Dealer says GM won't do much in terms of replacement Z06 - and lemon law takes a long time/lots of documentation etc. If they give me what I paid for it...it's gone.
#25
Team Owner
I would be speaking with someone up the food chain and get rid of the Z one way or another.
#26
Le Mans Master
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Have a new 2012 Z06. 3 miles on odometer when delivered June 2nd. At 60 miles it started to misfire - to the point of stalling. Always in stop and go traffic - hot Texas afternoons. Spent 2 weeks at GM dealer.... nothing found. With 300 miles on it, misfire started again but worse - heavy backfiring; shaking; raw gas smell. This time dealer captured cylinder #4 misfire (9900 times). Replaced coil; plug, plug wire. Left dealer…. came back 5 min later with check engine light on. Code says #4 misfire and catalytic converter. Been in dealership now for 1 week. Any ideas on what is wrong???? I posted this as well in the Z06 forum. Just looking to see if anyone has had the same experience and what the fix was. But, as the folks on that forum suggest...my call to GM should have occurred sooner! (Will call Monday!)
#28
Safety Car
#29
Le Mans Master
On way to dealer, dropped a cylinder or two again, foot to the floor - 30 mph max. backfiring etc. No service engine light came in. Car now has 322 mph - mostly from service driving it. Dealer says GM won't do much in terms of replacement Z06 - and lemon law takes a long time/lots of documentation etc. If they give me what I paid for it...it's gone.
I can only imagine how frustrating you must feel.
#30
If it hasn't happened already get a GM Service Rep involved, Lemon Law isn't all that hard (been there) and by now they should be kissing your ***. I am betting a pinched wire or screw through a harness, either way it's not your fault or the dealers fault (they should be on your side by now, they didn't break it), if they aren't start with getting the dealership GM or owner involved, they should want to know about this, it's the product they represent as theirs with their name on it. Pick out or order a 2013 and tell them to call you when it gets there, enough is enough after all your situation is making the car dangerous to operate.
My comments are based on 20+ years of dealership employment and one personal lemon law give back.
My comments are based on 20+ years of dealership employment and one personal lemon law give back.
#31
That right there sounds like a service writer / advisors comment and is rubbish, make an appointment to see the GM or Owner, after all you were nice enough to trust them with your business and ZO6's cost as much as some peoples houses last time I checked.
#33
Safety Car
On way to dealer, dropped a cylinder or two again, foot to the floor - 30 mph max. backfiring etc. No service engine light came in. Car now has 322 mph - mostly from service driving it. Dealer says GM won't do much in terms of replacement Z06 - and lemon law takes a long time/lots of documentation etc. If they give me what I paid for it...it's gone.
You will always be wondering, what next.
Get a new one.
#34
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Started this at 60 miles! I'd stop fooling with it. They need to get you in another car asap. If not kill the deal. Get ALL of your money back. The dealer principal where you bought ought to be working with GM to get you in another car asap. I've seen this same scenario many times, Usually 'they' are jumping through 'hoops' to get the customer out of the trouble vehicle and they weren't $100,000 dollar cars.
#35
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GM sending technician(s) next week. Case started with GM. (My bad on this - should have started it sooner.) GM tech has indicated this is a first for them. Most think it is BCM/ECU related as no codes came in/no check engine despite the engine shake and misfire so bad. Dealer found no codes, even while engine was screwing up, but did find that this latest event ruined both cat converters. Dealer Mgr. met with me re ensuring paperwork in place for potential Texas Lemon Law. Dealer suggested putting scanner/data grab on car and letting me drive it so that it can capture data......I am hoping GM reps next week can solve, without this step. Pretty much fed up now. Have told dealer and GM that if it is not solved next week, I am getting the lawyer to talk for me and leave the Z06 sit where it has sat for the majority of time I have owned it...in the far left corner of the shop. I did not buy a Z06 to time share it with their supposed corvette specialist. He has put more miles on it than me.
#37
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Got hit in the eyes before end of thread!
Have a new 2012 Z06. 3 miles on odometer when delivered June 2nd. At 60 miles it started to misfire - to the point of stalling. Always in stop and go traffic - hot Texas afternoons. Spent 2 weeks at GM dealer.... nothing found. With 300 miles on it, misfire started again but worse - heavy backfiring; shaking; raw gas smell. This time dealer captured cylinder #4 misfire (9900 times). Replaced coil; plug, plug wire. Left dealer…. came back 5 min later with check engine light on. Code says #4 misfire and catalytic converter. Been in dealership now for 1 week. Any ideas on what is wrong???? I posted this as well in the Z06 forum. Just looking to see if anyone has had the same experience and what the fix was. But, as the folks on that forum suggest...my call to GM should have occurred sooner! (Will call Monday!)
#38
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General Texas Lemon Law, a rough idea!
I went through alot of problems with trying to do a lemon law claim in Texas. This is some of the general thoughts from five (5) years ago, I have a 2006 C6 A6 F55 NAV:
DISCLAIMER: DISCLAIMER FOR ANY ADVICE GIVEN OR SPECULATED FOR ANY COMMENT(S) AND/OR ADVICE GIVEN IN OR FOR THIS THREAD OR POSTS.
GENERAL TEXAS LEMON LAW (A very rough idea):
1. UPFRONT ADVICE: GET A LEMON LAW ATTORNEY (Specialist);
2. Claim has to filed in/for the first one (1) year period (different states have different periods AND rules);
3. The problem has to taken to the dealer three (3) times for the SAME PROBLEM. Note: Catch here, dealer has to claim same problem each time, BUT the dealer will make up DIFFERENT EXCUSES (sometimes very lame excuses) each time for different problem;
4. Car has to be out of service for something like thirty (30) days or more in their shop, etc., maybe multible times;
5. The dealer KNOWS HOW TO PLAY THE LEMON LAW GAME (I think GM even helps coach them as in the past);
6. Dealer PLAYS DELAY, DELAY, AND DELAY to get past the one (1) year period and three (3) same problem claim.
Note: Each state has different time periods from one (1) to three (3) years AND different rules, if I remember correctly and other variables.
Advice: Start you homework on your state lemon law IMMEDIATELY, because these guys play hardball and you can definitely lose quickly.
You need to get a "LEMON LAW ATTORNEY" NOT "A ATTORNEY"
GOOD LUCK AND YOU WILL NEED IT!
PS: Don't let the DEALER MISLEAD YOU THAT HE IS FOLLOWING ALONG THIS LEMON LAW CLAIM AND DOING ALL THE RIGHT THINGS, HE MAY MISLEAD YOU. THAT'S WHY YOU GET A "LEMON LAW ATTORNEY", PERIOD!
PS: I finally got my car completely repaired, BUT it took five and one/half (5 1/2) years AND the one (1) year time period ran out (I also had the GMPP extended warranty plan (84 mos./84K miles) which made it hard for me to go away). It was tough, you have to stay ALL over them. Good luck!
DISCLAIMER: DISCLAIMER FOR ANY ADVICE GIVEN OR SPECULATED FOR ANY COMMENT(S) AND/OR ADVICE GIVEN IN OR FOR THIS THREAD OR POSTS.
GENERAL TEXAS LEMON LAW (A very rough idea):
1. UPFRONT ADVICE: GET A LEMON LAW ATTORNEY (Specialist);
2. Claim has to filed in/for the first one (1) year period (different states have different periods AND rules);
3. The problem has to taken to the dealer three (3) times for the SAME PROBLEM. Note: Catch here, dealer has to claim same problem each time, BUT the dealer will make up DIFFERENT EXCUSES (sometimes very lame excuses) each time for different problem;
4. Car has to be out of service for something like thirty (30) days or more in their shop, etc., maybe multible times;
5. The dealer KNOWS HOW TO PLAY THE LEMON LAW GAME (I think GM even helps coach them as in the past);
6. Dealer PLAYS DELAY, DELAY, AND DELAY to get past the one (1) year period and three (3) same problem claim.
Note: Each state has different time periods from one (1) to three (3) years AND different rules, if I remember correctly and other variables.
Advice: Start you homework on your state lemon law IMMEDIATELY, because these guys play hardball and you can definitely lose quickly.
You need to get a "LEMON LAW ATTORNEY" NOT "A ATTORNEY"
GOOD LUCK AND YOU WILL NEED IT!
PS: Don't let the DEALER MISLEAD YOU THAT HE IS FOLLOWING ALONG THIS LEMON LAW CLAIM AND DOING ALL THE RIGHT THINGS, HE MAY MISLEAD YOU. THAT'S WHY YOU GET A "LEMON LAW ATTORNEY", PERIOD!
PS: I finally got my car completely repaired, BUT it took five and one/half (5 1/2) years AND the one (1) year time period ran out (I also had the GMPP extended warranty plan (84 mos./84K miles) which made it hard for me to go away). It was tough, you have to stay ALL over them. Good luck!
Last edited by 2006c6keller; 08-23-2012 at 11:58 PM.