my car is a manual, 2000 Corvette, and has an east coast supercharger on it. I replaced my clutch, and rebuilt the torque tube and all that fun stuff. Well after doing this, the car isn't running right. It backfires on acceleration (only sometimes) and it stutters when accelerating as well. I looked at the codes and they are as following: U1096, U1301, B1001, P0103. I have always had the P0103 code sense I got the car (a few months ago) I assume I've always had this code due to the supercharger. I feel like the car has no torque at all as well. Any help would be greatly appreciated. It did say 'tcs warming up' for 2 days, but it has went away now, not sure if that is related or not though.

 

P0103 code is most likely your problem. Do you know what that code is? Never assume anything when you get a code to pop.
P0103 is a diagnostic trouble code (DTC) for "Mass Airflow (MAF) Circuit High Air Flow and High Voltage Output".
A bad MAF sensor can cause your vehicle to experience poor drivability issues such as engine stalling, jerking or hesitation during acceleration. This could happen while speeding up on the highway on-ramp or cruising down a city street. These issues can create dangerous situations causing accidents and injury.

 

when you did the clutch did you tilt the engine down too far ??? pulled something loose or broke it ??? (like the map sensor or a o2 connector)

 

Moved to C5 Tech for some assistance.

 

I had a pro shop do my clutch, and found my entire air duct system pulled by the engine sag, with small air gaps at three locations.

 

Unacceptable. If the car came in with no codes, but left with a Dozen...I wouldnt have even gotten half a block before returning and seeking a remedy. I take it he has your money already so resolution to the issue should be straightforward but could also be F'you I didnt do it. When I was wrenching for pay, as soon as the customer signed the work order and left...baring anything that we touched, they were generally on their own for issues outside of what they cam in for. Sounds like they were not familiar with the C5 platform and shot gunned the car apart and played guessing game putting it back together. Air gaps? Explain further. I'd go over every sensor and harness connection you can and see if anything didnt get pulled or stretched out of wack when they loosened the rear cradle for TT removal. Its only supposed to be titled so much. and after removal...the engine should be supported to stop aft movement

Joe

 

Yeah I wouldn't categorize the shop you had do the work as "pros" at anything. If they won't warranty their work you're better off doing it yourself.

Edit: To add a bit to the warranty thought, I initially overlooked the supercharger, but I'm surprised you found "pros" who would even touch your car knowing it has mods like a supercharger. If it was bone stock that's one thing, but when a business takes on a job where there's been custom work done they're basically taking responsibility for the custom work everyone else has done on the car, and that can become a very, very deep rabbit hole. Not always a particularly profitable endeavor for a business, unless they charge accordingly (meaning exhorbitantly). Just a bit of food for thought. To summarize, you will have to be the judge as to whether you got what you paid for.

 

Meh...using that logic...nobody would work on anyone's cars...brakes, suspension, etc lol I get what your saying about extreme mods and shop discretion but these days...if you wrench for pay...I don't know to many turning down paying work. With that said, hopefully his shop makes it right...but agreed...ONLY what they touched or did.

 

Is your car tuned in "Speed Density"? If so the tuner should have disabled the P0103 code in the tune. You said you always had the code but was it P0103H (history) and now P1013C (current)? Reset all the codes and see what comes back if you haven't already. Suspect you're in "limp home mode" and once cleared you'll be back to running fine. If it was tuned with the MAF look for damaged wiring going to the MAF and of course make sure it's plugged in good. Also check over your plumbing coming from the supercharger for leaks/hoses poped loose as it is under pressure.

 

I agree with the others - your car should haven’t had made it half a mile from the shop if it was behaving this way while throwing codes. Should have returned it as soon as the codes/hesitation started. My guess is a MAF got pulled out. I had something similar happen and it ended up being a vacuum line that came disconnected.

Cliff notes: return the car to the shop.

 

You make a good point. It seems like finding C5s that haven't been extensively molested by said mods are becoming hard to find. Especially M6 cars.

Just for a bit of background, two of my best friends / classmates from highschool are professional mechanics. I still keep in close contact with them and they tell me everything about life and business. One of them happens to have a tire machine and alignment machine, and if he didn't let me do the work myself or supervise / assist I probably wouldn't use him for anything. The other will never get within 10 feet of any of my vehicles with so much as a screwdriver.

On the other hand, the one pro wrench guy I have the most trust in won't work on any kind of Corvette. He's the only one in my contacts list with a state inspection certification, and he bitches and moans when my C5 needs a safety inspection because of what a huge hassle it is to get on a lift. Says he turns away everyone with a C5 or newer, and rarely if ever touches older Vettes because he doesn't want to attract "that kind of crowd".

I also hope his shop makes it right, but I think you might be missing my point. When there's obvious mods and tuning that have been done to the car, shops will almost universally point out those mods and say they can't / don't know how to fix it because they don't know what else has been done. Obviously it's a lame excuse, but I've seen it successfully wielded more than once. Fixing something where the factory troubleshooting flowchart has been changed in ways only the tuner or shop that did the mods knows about can be a massive time waster.