Hello friends!
More then an year I was a very pleased C6 owner, but now I have a very big problem…
The story is as follow:
1. We ordered from US whole exhaust system – Dynatech headers, Borla exhaust system and so on…
2. After the installation everything was OK for some days – then the “check engine” gauge was activated. We expected this because of the drills, but wanted to be sure that this is the reason and took the car to the so called “Bulgarian Chevy dealer” and then the problems started…
3. The only had to inspect the ECU, but it took them 3 hours! When they gave us the car, after some miles started to appear different messages on the OB computer – “check gauges” “headlining is preparing” and so on and so on… At the moment even when I lock the car and every time after that I find it with an open back hood!!!
So please help me! Do you have any idea or advice what is going on with this car? Is there any chance the mechanics to disturbed the ECU? Is there any chance for me to restore the factory settings as a beginning and finally what is the situation with the warranty – is it really international and do I have to rely on it at all?

Many thanks in advance!!!

 

You may want to find another European dealer that has more experience with Corvettes. Good Luck!

 

If you're experiencing problems like the "back hood" (trunk cover?) popping open, then that is not an ECU (GM calls it the PCM) issue. Functions like the opening of the trunk are usually controlled by the BCM (Body Control Module) or other modules, but not the PCM.

Maybe you disturbed a ground strap/wire during your installation ??

That's where I would start.

 

Your suggestion seems very reasonable – thanks! The ground wires will be the first thing to check.
But is there any possibility to restore the factory settings of the car after all these things are checked? And do you know where to look for this BCM module?
Thanks again

 

The BCM is located under the forward carpet (angled, not the flat carpet) in the passenger footwell. It is the big box to the left of the Fuses. I'm not sure that's gonna help you, it is not something you can open up or diagnose without a scan tool.

From your post I'm not sure I understand the question of "return to original factory settings" ... did you "flash" the PCM and alter the software as part of your upgrade? If so, ask the company that provided the changes if there is a way to "return to original settings".

If your local dealer knows what they are doing, they can use the scan tool and a PC to re-flash the PCM to "original settings" ... you can't do it yourself that I know of.

Again, though, it doesn't sound like the PCM is causing the problems you're describing.

After checking for a loose ground wire (look around the areas you worked around), if no luck, have the dealer use the scan tool to check for stored DTC's in the various modules (computers) in the car. That MAY help you (and/or the dealer) in locating what the problem is.

I have no clue what the warranty situation is when the vehicle is overseas. Check your Owner's Manual .... it might have some explanation if the vehicle is an "export" built car on what kind of warranty coverage is in place.

Good luck

 

Man, thank you again – you help me more through the internet than the mechanics in the dealership…
First, no I didn’t flash the anything in the car – I just meaned, that after all these warning messages to find a way to “clear” all of them and to return everything as in day one…
Also now I am coming back from the service. Again the only problem that was discovered was the front “lambda drill/drills” (I am not sure it is right in English)… They scanned the computer of the car with a portable device, which even didn’t have the ability to print the scan results…
What type of device they need to scan the rest of the modules/ computers?
And most important question – if the new sport exhaust has damaged the front “lambda drills”, what I have to do? To replace them or what? – I mean if I put new ones, what is the chance to be damaged again by the new exhaust? From what I know the possibility to be damaged the rear drills is much bigger in this type of exhaust modifications and in these cases there is some type of simulators for the back drills, but for the front ones I know that there isn’t… And what I have to do know???
Thanks again for the big help man!!!

 

OK, what they used to scan the computers is a hand held device called a Tech2 (at least that's what they should be using). It can scan any/all of the computers in the car. Here in the US a dealer pays over two thousand US dollars for one, and even more for added features (such as the CANdi box needed to hook it up to a C6 Corvette). If you saw it, it should look like this:

http://www.vetronix.com/aftermarket/

On the left select SCAN TOOLS and then look at the details about the TECH 2 ... including prices

As far as clearing messages, no need to worry about that, it can be done with the Tech 2, or the computers in the car will "clear" the faults by themselves once the condition setting the messages has been fixed.

When you're talking about LAMBDA ... sounds like they are referring to what are usually referred to as the OXYGEN (O2) sensors in the exhaust system.

If you are having problems with those you will most likely have a CHECK ENGINE indicator. Again, once the problem is fixed the computer will turn off the light by itself after you have driven the car several times.

I know there are a number of issues with O2 sensors and aftermarket exhaust systems. I can't help you with those as my car has a stock exhaust and I've never played with such systems.

I'd recommend you do two things .....

1) contact the vendor of your exhaust system and see if they can assist you with O2 sensor issues.

2) Ask the dealer what DTC codes were set .... they should have a record. They will give you something like P0133 or P0153, or whatever. Open a new thread asking for help here on the Forum specificcally to do with your aftermarket exhaust and what DTC has been set. There are a number of people that have a lot of experience with such issues.

Again, best of luck