SES Light

[Twinmags]

I had to replace the rubber T on top of the PVC valve with a new one. I did that, started it up, turned over fine, but idled badly and blew some smoke for a few seconds then the SES light came on and then she idled fine with no smoke like normal no bad sounds and at the regular RPM. So I checked the codes again and it was still showing a 33. Disconnected the battery for one minute to clear the code and started it up again and it did the same thing. Anyone got any answers?

[rkreigh]

first check to see if the map hose is still connected, might have popped off and it will go into limp home and run very rich.

[Twinmags]

MAP hose seems to be connected.

[Jeffvette]

MAP hose seems to be connected.

Make sure it is connected at both ends and that the hard tube has not slipped off the nipple.

[Z Factor]

I had to replace the rubber T on top of the PVC valve with a new one. I did that, started it up, turned over fine, but idled badly and blew some smoke for a few seconds then the SES light came on and then she idled fine with no smoke like normal no bad sounds and at the regular RPM. So I checked the codes again and it was still showing a 33. Disconnected the battery for one minute to clear the code and started it up again and it did the same thing. Anyone got any answers?

Hello, and welcome to the forum.:handshak:

I suspect the same things as the other posters, but let us know your progress.

:cheers:

[Twinmags]

I took my Z to my local Chevy dealership that handles and originally sold ZR-1s. Their most experienced mechanic found a vacum leak underneath so bad he said he sprayed carb cleaner under the engine bay and it almost killed the engine. It is going to be $400 parts and labor. I talked with some of my car guys and they said that sounds about right. I said for them to go ahead and do get it done. Let me know what you all think.

[Z Factor]

I took my Z to my local Chevy dealership that handles and originally sold ZR-1s. Their most experienced mechanic found a vacum leak underneath so bad he said he sprayed carb cleaner under the engine bay and it almost killed the engine. It is going to be $400 parts and labor. I talked with some of my car guys and they said that sounds about right. I said for them to go ahead and do get it done. Let me know what you all think.

Keep in mind that just because a dealership sold ZR-1's. it does not mean they have mechanics trained or certified to work on an LT5. Many parts on a ZR-1 are standard C4 issue, and any competent mechanic can effect repairs (assuming you want to pay through the nose). However the engine is a different story, and even experienced Corvette mechanics do not want to touch them. I understand if you do not want to do the work yourself, but you would probably be better served to find a ZR-1 mechanic and let him do the work. It will be done right, and typically for less money.

:cheers: