2022 stutter
Advanced
Joined: May 2016
Posts: 67
Likes: 40
From: Natchitoches, LA
Got my car back today. Evidently they had to change 3 of the exhaust manifold studs. Maybe the broke or stripped them out when they removed. I didn't ask.
Put 75 miles on the car and it is running perfect now. One thing that I didn't recognize before is that at idle it was "hunting". The idle is much more stable now.
The notes from the technician said that the "camshaft position variance was excessive, up to 6.4 degrees". So as @MikeinAZ noted they can watch that @Z Dream . The TSB even talks about it.
So far so good on mine. I'll update if anything changes.
Put 75 miles on the car and it is running perfect now. One thing that I didn't recognize before is that at idle it was "hunting". The idle is much more stable now.
The notes from the technician said that the "camshaft position variance was excessive, up to 6.4 degrees". So as @MikeinAZ noted they can watch that @Z Dream . The TSB even talks about it.
So far so good on mine. I'll update if anything changes.
Burning Brakes
Joined: Feb 2011
Posts: 833
Likes: 469
From: Goodyear AZ
Got my car back today. Evidently they had to change 3 of the exhaust manifold studs. Maybe the broke or stripped them out when they removed. I didn't ask.
Put 75 miles on the car and it is running perfect now. One thing that I didn't recognize before is that at idle it was "hunting". The idle is much more stable now.
The notes from the technician said that the "camshaft position variance was excessive, up to 6.4 degrees". So as @MikeinAZ noted they can watch that @Z Dream . The TSB even talks about it.
So far so good on mine. I'll update if anything changes.
Put 75 miles on the car and it is running perfect now. One thing that I didn't recognize before is that at idle it was "hunting". The idle is much more stable now.
The notes from the technician said that the "camshaft position variance was excessive, up to 6.4 degrees". So as @MikeinAZ noted they can watch that @Z Dream . The TSB even talks about it.
So far so good on mine. I'll update if anything changes.
Enjoy your ride!
Advanced
Joined: Dec 2021
Posts: 55
Likes: 18
From: Arizona
On to the Engine! Just got off the call with the Dealership. SHOCKER! Replacing the Transmission Valve body did nothing 2 weeks later. Now they have escalated it to the GM Engine Engineer. I reminded him again of the issues you both had and got fixed. He sd he would let the tech know. Now it has been at dealership a total of 36 days out of the 3 months i have had the car. I was on phone 45 minutes yesterday with the GM legal rep as they got my BBB Auto Line complaint. She has all the info she needs and is taking it to GM for them to decided if they want to Replace or Buy Back my Vette. What a F'd up deal. After waiting forever for the car, spend thousands more on PPF and accessories, you get to spend all the time you have it broke and dealing with GM to do what's right. At this point I don't even want this Vette or another Vette!
Burning Brakes
Joined: Feb 2011
Posts: 833
Likes: 469
From: Goodyear AZ
On to the Engine! Just got off the call with the Dealership. SHOCKER! Replacing the Transmission Valve body did nothing 2 weeks later. Now they have escalated it to the GM Engine Engineer. I reminded him again of the issues you both had and got fixed. He sd he would let the tech know. Now it has been at dealership a total of 36 days out of the 3 months i have had the car. I was on phone 45 minutes yesterday with the GM legal rep as they got my BBB Auto Line complaint. She has all the info she needs and is taking it to GM for them to decided if they want to Replace or Buy Back my Vette. What a F'd up deal. After waiting forever for the car, spend thousands more on PPF and accessories, you get to spend all the time you have it broke and dealing with GM to do what's right. At this point I don't even want this Vette or another Vette!
I do think you are close to the end now, maybe try to get gm to throw in an extended warranty vs a buyback.
Advanced
Joined: Dec 2021
Posts: 55
Likes: 18
From: Arizona
I am definitely close to the end.. The end of the POS car. I can only laugh at this time with everything they have done but change the tires.. They gave up on transmission issues and went to the Engine engineer,. his first option was to replace spark plugs. Well of course that did nothing.. The last text i just got now says the car has been escalated to the Platform team! .This car has been torn down 3 times now and put back together with zero results. I think its time GM takes this car back and pay me for all the pain and suffering of dealing with this car plus all the accessories I added thinking this care was the best thing in the world to find out it has been the worse experience ever with any car I've had in 30 plus years.
Burning Brakes
Joined: Feb 2011
Posts: 833
Likes: 469
From: Goodyear AZ
Sorry to hear it man, I was in your shoes actually not even as bad so I know just how you feel. I was out looking and pricing Porsche 911s and was sure if I got this car back and it was not working right I was just going to start the buyback process.
I cant believe how incompetent this dealer is tho, or the gm people they are talking to. If the timing is off, it's not spark plugs, or a transmission! Sounds like their testing is not very thorough maybe? I can give you my techs phone #, maybe he can tell you what to tell your tech, idk. Let me know if I can help!
I cant believe how incompetent this dealer is tho, or the gm people they are talking to. If the timing is off, it's not spark plugs, or a transmission! Sounds like their testing is not very thorough maybe? I can give you my techs phone #, maybe he can tell you what to tell your tech, idk. Let me know if I can help!
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Cruising
Joined: Apr 2023
Posts: 14
Likes: 9
I feel like I have the same problem. When the car is under load, in manual mode, when I lightly press the accelerator, I feel a single “buck” before it begins to go. If I mash the throttle, there is no buck. If I very lightly press it, then press more, no buck. It only happens when I go from no throttle, to lightly pressing the throttle in manual, at low rpm’s 1800-3000. A single “buck” almost every time. 5th or 6th usually. Feels like hitting a small speed bump.
Burning Brakes
Joined: Feb 2011
Posts: 833
Likes: 469
From: Goodyear AZ
Mine didn't feel like this, it was a surging feel. The rpms went up and down with about 400rpm fluctuation. Even did it in neutral, try reving it in neutral and if it doesn't do it, it could be your transmission. If it does do it, it's the engine.
Advanced
Joined: May 2016
Posts: 67
Likes: 40
From: Natchitoches, LA
Mine didn't have as much rpm fluctuation as Mike's, but it was similar. So maybe 100 rpm or so fluctuation. One thing I notice now is that after changing the cam magnet the idle is rock solid. Before it would hunt around with that 100 or so rpm fluctuation.
For whatever reason mine would only manifest at lower rpms (1800-2000 or so) and light throttle. Then it definitely felt like a quick miss in the ignition system.
For whatever reason mine would only manifest at lower rpms (1800-2000 or so) and light throttle. Then it definitely felt like a quick miss in the ignition system.
Drifting
Joined: Feb 2023
Posts: 1,353
Likes: 1,115
Evidently, the control system does not look for this kind of failure. And, that's a shame. You need a sharp tech to understand, analyze and diagnose this. Working with computers does not mean you can rely on them to always tell you what's wrong.
Advanced
Joined: Dec 2021
Posts: 55
Likes: 18
From: Arizona
Cruising
Joined: Apr 2023
Posts: 14
Likes: 9
It seems you may have same issue as mine. After they replaced my transmission and it didn't fix it the next things engineers had them do was replace the spark plugs lol. After that and waiting another week they advised them to replace the injectors. Shocker.. That did not fix it. Mine has been at dealership since Feb! See other post
Burning Brakes
Joined: Feb 2011
Posts: 833
Likes: 469
From: Goodyear AZ
With more and more of these issues popping up its surprising GM is still misdiagnosing so many of them. Makes me grateful at least mine was fixed relatively quick.
Advanced
Joined: Dec 2021
Posts: 55
Likes: 18
From: Arizona
It is constent around 1800 RPM no matter what drive mode you are in,.. Has to have a load on it .. meaning light uphill. All the time. Not while reving engine. Only while driving under load.