WARNING:High RPM hesitation/surging issue solved. See pictures and check yours!
 

This has been originally discussed at this thread :

http://www.camaro6.com/forums/showthread.php?t=487290

and then another forum member mentioned here:
http://www.camaro6.com/forums/showthread.php?t=488500

I ran into the same issue after my second track day. I initially thought that I had bad fuel and since I couldn't reset my ECM (apparently not easy task on these cars), I was under the impression that the ECM cannot recover itself from the bad/low octane map or pulling timing or something (as it did with previous Gen Camaros).

I've scheduled an appointment with my dealer for this Wednesday to do that. It's also a bit hard to replicate the issue on rainy, cold days since it requires a WOT and can only be done (safely) in traffic on 2nd gear.

I was scratching my head because it happened to a 17 Camaro SS owner, a brand new 1LE at the dealer showroom(!), to my 17 1LE and a 17 ZL1 owner. I would understand the SS cars but ZL1 has a completely different motor and a tune of course. Forum member "geaux_tigerss" says that the dealer replaced the camshaft solenoid and ECM but still didn't fix the issue :confused0068:. It turns out that the A/C belt -under high load- was rubbing against the wiring harness right below it, and stripping two wires and causing that surging issue at around 5500 RPM. It didn't reach to a point where it displays a CEL in my experience but he had both CEL and the issue was existent all the time.

I checked mine and as expected I was dealing with the same exact issue. I took some pictures showing how it's stripped. It looks like a manufacturing defect and somehow they didn't pay attention to that clearance between the wiring harness and the A/C belt. I would be surprised if the clearance is different on other cars unless they changed the method of putting the wiring harnesses all together. I would highly advise to check yours and if you don't see any rubbing/stripped wire, consider yourself lucky and simply put a zip tie to make some space between those two (wires and A/C belt above it)

I put the below pieces aside for an easy access:
https://lh3.googleusercontent.com/EM...=w1289-h966-no

Notice the two completely stripped wires touching each other in the below picture.. right next to the purple wire:

https://lh3.googleusercontent.com/MH...=w1337-h966-no

I used some electrical tape to insulate those two wires (simply pushed some tape with a thin, flathead in between) then wrap around it with another electrical tape and zip tied it with the connector wire so that it would pust it away from the belt and give some space.
Note: Needle nose pliers helps a lot if you have big hands like me :)

I took it for a quick ride to test it and the hesitation is gone now. Phew! what I relieve ..:thumb:
https://lh3.googleusercontent.com/Oi...=w1298-h966-no

no pics

yes, sorry about that. They should be working now

working. i just picked mine up on thursday ill have to check.

congrats on the new car :thumb:

Thanks for sharing your experience and the pics. I was the OP for the first thread. Yep, the guy who test drove the 1LE with only 9 miles that experienced this issue. I bought the car anyway and will be checking mine later this week to see if I have the same issue.

Thanks again.

First, thank you for this. It will be interesting to see how this is configured across thousands of cars. I certainly don't like the looks of it and will be checking mine.

Now the head-scratcher... so the two wires were stripped with a theoretical intermittent short causing surging, but no CEL. Where does that harness connect and what are the two wires involved?

Very interesting, and thanks again!

I checked mine (Jan. 2016 build) and I have a lot of clearance - at least 2 inches between the wiring harness and the A/C belt. Yeah!

You're welcome :)

Your guess is as good as mine. Since I don't have an engine diagram, I am not exactly sure what it could be called but it attaches to plug on the engine block

good to know :) Thanks for the info. As I never heard this on 2016 Camaros, it makes me think that they changed the way they put these wiring harnesses and/or forgot to keep it away from the belt after 2017.

It might as well be limited to certain production dates. Mine was made on Nov-2016 for the reference

So I checked mine and I can tell you my car does not have a wire loom in that position. Maybe this is a M6 only type setup. So it's not a MY17 issue at least.

Great, do you have enough clearance also?
So far all 4-5 cars that had this issue were 2017 but like you said, it may be only limited to certain production date

Attaching a photo of mine. Not the best since I'm not trying to remove the intake elbow but definitely looks like the wire loom in question is configured differently on my. The pic really doesn't show it but there's a solid 3 inches from the wire loom going to the A/C compressor to the belt.

Mine is a early build MY17 and Auto. So hopefully we can get some other responses to tell if certain build dates or M6/A8 issue. https://uploads.tapatalk-cdn.com/201...aec9e355ae.jpg

Sent from my SAMSUNG-SM-G920A using Tapatalk

It looks like from what I can tell with my cheap borescope camera that harness goes from the back of the A/C compressor to the block. So maybe the surging is due to drag from the compressor being cycled from the shorted wires. Could be why it never tripped a CEL.

I didn't take a picture but my harness clearance looks the same. So, to help with year and model info- here are the details for mine:

2016 1SS 6MT Jan. 2016 build date