[glamcem]

Originally Posted by geaux_tigerss

I have the exact same experience with my car. 2017 2SS M6. I followed the 1500 mile break in guideline with from the manual.

In first, second, and third gears I've noticed a hesitation or two. One between 5000-5500 and the other around 6000. It's like timing gets pulled for a fraction of a second and then comes back. It does it regardless of drive mode or whether traction or stability control is on or off. Outside temperature is 80 or so, clear and dry. Roads are good. Has done it consistently on premium fuels from many different stations.

It isn't the tires breaking loose (in 3rd? Come on) and it isn't bumping the rev limiter (happens twice and tbh this car isn't so fast that I'm gonna confuse 5000 to 5500 with 6500). This isn't my first fast car or even first camaro.

But wait, there's more. Yesterday morning I got a CEL. Car start bucking and surging like it's got a big cam with a really bad tune. Happens at all RPMs, constant speeds, acceleration, you name it. Idles well tho. Dropped it off at the dealer to fix.

Their first idea is bad camshaft position solenoid. That didn't fix it. Second try is a new ECM. Waiting on that to come in now.

Edit: my signature is a few cars out of date. I'll fix it when I'm not on mobile.

Did they ever try resetting or reflashing the ECM before changing it? I wonder if this is an issue that happened to Gen 5 owners (car stays in retard mode even after a few tank of new gas) like X25 mentioned in his above post

[Sooner Cole]

Originally Posted by geaux_tigerss

I have the exact same experience with my car. 2017 2SS M6. I followed the 1500 mile break in guideline with from the manual.

In first, second, and third gears I've noticed a hesitation or two. One between 5000-5500 and the other around 6000. It's like timing gets pulled for a fraction of a second and then comes back. It does it regardless of drive mode or whether traction or stability control is on or off. Outside temperature is 80 or so, clear and dry. Roads are good. Has done it consistently on premium fuels from many different stations.

It isn't the tires breaking loose (in 3rd? Come on) and it isn't bumping the rev limiter (happens twice and tbh this car isn't so fast that I'm gonna confuse 5000 to 5500 with 6500). This isn't my first fast car or even first camaro.

But wait, there's more. Yesterday morning I got a CEL. Car start bucking and surging like it's got a big cam with a really bad tune. Happens at all RPMs, constant speeds, acceleration, you name it. Idles well tho. Dropped it off at the dealer to fix.

Their first idea is bad camshaft position solenoid. That didn't fix it. Second try is a new ECM. Waiting on that to come in now.

Edit: my signature is a few cars out of date. I'll fix it when I'm not on mobile.

I'm having a similar issue. Mine is cutting power while at WOT in first gear. It usually happens between 5000-5500 RPM. Took it for service this morning. It was NOT showing any codes and they could not find any issues. So I took technician on a drive while he had computer connected to car. Sure enough, it cut power completely at 5600 RPM. I was actually relieved, now it is documented. They are going to bring in a Chevrolet area specialist to look at it. Will keep you updated...

[glamcem]

Originally Posted by 17ZL1Camaro

I'm having a similar issue. Mine is cutting power while at WOT in first gear. It usually happens between 5000-5500 RPM. Took it for service this morning. It was NOT showing any codes and they could not find any issues. So I took technician on a drive while he had computer connected to car. Sure enough, it cut power completely at 5600 RPM. I was actually relieved, now it is documented. They are going to bring in a Chevrolet area specialist to look at it. Will keep you updated...

I might have the same issue since I also noticed some hesitation during WOT but I was thinking it may be just a bad gas. I don't have any CEL or idle issues like geaux_tigerss mentioned above. I also didn't notice any power cut but it feels more like a small hiccup (like you have a bad gas).

Did they reset your ECU and see if it can fix? I will need to wait till next week. Dealer or I cannot replicate this, since it's all wet and rainy here.

Please keep us updated

[Sooner Cole]

Originally Posted by glamcem

I might have the same issue since I also noticed some hesitation during WOT but I was thinking it may be just a bad gas. I don't have any CEL or idle issues like geaux_tigerss mentioned above. I also didn't notice any power cut but it feels more like a small hiccup (like you have a bad gas).

Did they reset your ECU and see if it can fix? I will need to wait till next week. Dealer or I cannot replicate this, since it's all wet and rainy here.

Please keep us updated

They did not reset ECU yet. Waiting on a call for a plan of action. They are going to bring in an "area specialist". I took the car with me as I didn't want to leave it at the dealer.

[glamcem]

Originally Posted by 17ZL1Camaro

They did not reset ECU yet. Waiting on a call for a plan of action. They are going to bring in an "area specialist". I took the car with me as I didn't want to leave it at the dealer.

I find it very strange they didn't consider resetting the ECU If the issue is the same with the Gen 5 Camaros, it would be the easiest fix

[Sooner Cole]

Originally Posted by glamcem

I find it very strange they didn't consider resetting the ECU If the issue is the same with the Gen 5 Camaros, it would be the easiest fix

They said they can't reset the ECU. It has to be done with Chevrolet Tech Support involved and local dealer does not have the authority. At least, thats what the tech told me.

[X25]

Originally Posted by 17ZL1Camaro

They said they can't reset the ECU. It has to be done with Chevrolet Tech Support involved and local dealer does not have the authority. At least, thats what the tech told me.

We're not talking about reflash, just a simple reset. I think they're mixing things up : )

Even reflash shouldn't need that much involvement, in my opinion. After all, you're not loading a custom tune.

[SS 1LE]

Originally Posted by glamcem

I wonder if this is an issue that happened to Gen 5 owners (car stays in retard mode even after a few tank of new gas) like X25 mentioned in his above post

The 6th gen ECM doesn't have that parameter...so that can not happen. Confirmed by Tim at EFI...

...which is a good thing.

[X25]

Originally Posted by SS 1LE

The 6th gen ECM doesn't have that parameter...so that can not happen. Confirmed by Tim at EFI...

...which is a good thing.

If this is indeed the case, I'm really starting to wonder what the root cause could be..

What we know (correct me if I'm wrong):

• Happens on 2017 cars.
• Even reproed on a brand new car at only 9 miles off the showroom floor.
• Reported on 3 1LEs, and 1 2SS, so it's not specific to 1LE.
• In one case, the slight hesitation during WOT acceleration in certain RPM ranges has turned into complete shaky/bumpy drive in all RPM ranges (SCARY! Will this happen to the others? Will it happen to that brand new car, too?).

Long story short, the prospect is quite a bit scary, especially since it even happened on a brand new car. Is there a manufacturing defect? Are those who have the symptom safe to drive their car at the limits (I'd think not)?

Guys, please pressure your dealers to get to the bottom of this, in the name of public service, and please keep us posted, too.

[SS 1LE]

Originally Posted by X25

If this is indeed the case, I'm really starting to wonder what the root cause could be..

What we know (correct me if I'm wrong):

• Happens on 2017 cars.
• Even reproed on a brand new car at only 9 miles off the showroom floor.
• Reported on 3 1LEs, and 1 2SS, so it's not specific to 1LE.
• In one case, the slight hesitation during WOT acceleration in certain RPM ranges has turned into complete shaky/bumpy drive in all RPM ranges (SCARY! Will this happen to the others? Will it happen to that brand new car, too?).

Long story short, the prospect is quite a bit scary, especially since it even happened on a brand new car. Is there a manufacturing defect? Are those who have the symptom safe to drive their car at the limits (I'd think not)?

Guys, please pressure your dealers to get to the bottom of this, in the name of public service, and please keep us posted, too.

* one was a ZL1. So not an LT1 only thing.

Three cars is a pretty small group to base anything on yet. Could be dumb luck, faulty part used during a build week, etc, etc. Have to wait and see what the dealer says to the guys whose car had a CEL and started to run worse.

I can confirm my '17 SS 1LE doesn't do any of the sort. Part throttle, and WOT acceleration is smooth, and goes right to redline without any issues.

[X25]

Originally Posted by SS 1LE

Three cars is a pretty small group to base anything on yet. Could be dumb luck, faulty part used during a build week, etc, etc. Have to wait and see what the dealer says to the guys whose car had a CEL and started to run worse.

I can confirm my '17 SS 1LE doesn't do any of the sort. Part throttle, and WOT acceleration is smooth, and goes right to redline without any issues.

How many miles do you have on your car? I know that one of these cars started showing the symptoms only after a while (and a track day or two).

Obviously, just because there is an issue, it doesn't mean it will happen on every car, either.

[SS 1LE]

Originally Posted by X25

How many miles do you have on your car? I know that one of these cars started showing the symptoms only after a while (and a track day or two).

Obviously, just because there is an issue, it doesn't mean it will happen on every car, either.

...and one was a ZL1, not SS 1LE. So different engines...there was a V6 guy with a similar issue, ended up being a bad injector.

[glamcem]

Like X25 mentioned, this happening on a bone stock car might be very scary (and unacceptable IMO), if they're not able to diagnose the issue even with the CEL. It sounds like they're still not sure what the root cause is, and instead they simply go with trial-and-error method. I hope they can sort this out very quickly . In the meantime, I will wait to see when the weather conditions cooperate so I can schedule some time with my dealer to show them what's happening. If I learn any information I will share here on this thread for sure.

Just because it didn't happen to so many people (yet) doesn't mean that it won't happen though. I have a feeling we'll hear more reported incidents during this spring season. With that said, sometimes even if it happens, it may not be that noticeable in typical street driving conditions unless the person goes WOT (hard to replicate safely except 2nd gear on a dry, empty road)

[SS 1LE]

Originally Posted by glamcem

Like X25 mentioned, this happening on a bone stock car might be very scary (and unacceptable IMO), if they're not able to diagnose the issue even with the CEL. It sounds like they're still not sure what the root cause is, and instead they simply go with trial-and-error method. I hope they can sort this out very quickly . In the meantime, I will wait to see when the weather conditions cooperate so I can schedule some time with my dealer to show them what's happening. If I learn any information I will share here on this thread for sure.

Just because it didn't happen to so many people (yet) doesn't mean that it won't happen though. I have a feeling we'll hear more reported incidents during this spring season. With that said, sometimes even if it happens, it may not be that noticeable in typical street driving conditions unless the person goes WOT (hard to replicate safely except 2nd gear on a dry, empty road)

Yes, but you have to remember that these cars have been out since mid '15, with the exception of the ZL1. The LT1 is the same in the SS/SS 1LE...and over the near two years they have been out, any reports of issues like this are few and far between. Even new cars can have a defective part. My C5 Z06 had a CEL the first time I started it at the dealer (turned out to be a bad cat), it happens. Like I said, there was another member who had a similar issue on his V6, ended up being a bad injector. The CEL should lead them in the right direction though. If it's a bad batch of parts, it would be nice to compare build dates to help you guys out.

What was you build date? General month/year is on your door sticker, more exact date is on your window sticker...