ABNVET.I

I have been working on this car since I bought it (not running new motor)but now have it started. I had a new PCM installed and sent the BCM to get it hooked up and checked out with the PCM. I had a new ignition switch installed and by passed the VATS system also the TAC has been replaced. Now the problem is it will start right up with no effort at all then it runs great for a few seconds idles rough then dies. I checked fuel pressure and it is a constant 50psi. It sounds as if it is running out of gas when it dies. But then again it smells a like it is running rich. Any ideas?

ABNVET.I

Just went out and pulled the codes. Had a ton of "H" I wrote them down the cleared them. Started it it ran about 9 seconds then died. I pulled codes again and the only code that came back is PCM P1637 H. I also have no com with the right door it seems Makes sense since the window or nothing works on that door.

vetterdstr

the fuel pressure should be a constant 60 psi. Also, I am wondering if the OE alarm system has been initiated...

VR

ABNVET.I

Any way to bypass it to find out if this is the problem?

vetterdstr

I dont know of a bypass... although those symptoms sound like the alarm/fuel cut off system is activated. I guess it might be a good place to start.

VR

runamuk

You said that your VATS is bypassed right now, is that correct?

If so maybe you need to unbypass it to see what happens.

ABNVET.I

Just went out and un bypassed the VATS same thing happened.

ABNVET.I

Had a fuel pressure gauge on it all night and it held fuel pressure when it starts it is about 58psi not the 50 I stated. It smells of heavy exhaust when it is running and when it starts to die out you can flutter the gas pedal and it reves somewhat before it dies. If it was the alarm system killing it wouldnt I lose fuel pressure at the shrader valve?

ABNVET.I

Ok I have now seen that there was the steering wheel lock bypass done on it from GM. Could this have anything to do with it? Im running out of ideas here to look for.

vetterdstr

Are you sure the computer program correct? and it is communicating with the bcm correctly?

VR

ABNVET.I

yep sent both of them off together to get them married up. The shop said all looks good and this shouldnt be the problem. But like I said this is a new never run engine Im begining to thing GM didnt hook something up right. For one there is a plug at the rear of the intake looks to be 2 wires LT Blue and DRK Blue. It isnt plugged into anything. So I guess I need to start another thread of "Name This Plug" the new game show.

Dope

So you're saying that you're seeing 58psi even as the engine starts to stutter and die? Correct?

That code you mentioned appears to be related to the 'Generator' (Alternator I presume). It might just not have the 'signal' wire from the alternator hooked up (there is a small gauge wire/weatherpack connector on the alternator). There's a large sensor on the back of the intake which I believe is 2 wires, this is the oil pressure sensor. Maybe the car dies because it's 'seeing' no oil pressure?

I can tell you that when the car is in 'anti-theft mode', the engine will never run. It just starts for a split second and dies. No amount of throttle does anything. Just a quick fire and then the fuel pressure goes away and it dies. It also sets a specific code, which you don't appear to be getting.

Considering the weird code, the lack of the passenger door working, and the finding of random unplugged harnesses - it could be anything. I'd check and double check the PCM and BCM connections as a start.

Dope

Dope

Oh and btw, read this thread:

http://forums.corvetteforum.com/show...036&forum_id=1

Not the same code, but it's pretty close which makes me wonder. Maybe try the re-synch procedure that I describe. It couldn't hurt.

Dope

ABNVET.I

Yes it has fuel pressure all the time when it starts and when it dies.Well the altinator code is now gone seems the belt had not been put back on. It looked on but was not. Cleared codes again and no more code. Checked the right door and plugged replugged in the connectors all works fine there now also. But still starts runs about 10 sec and dies. There is a connector on the back drivers side of the intake that is not connected to anything. Looking to see what that goes to now. Thanks for the replys every step helps.

Dope

Post a pic of the connector if you can't figure it out. Even if I can't identify it I can just take a look at my car.

Dope

ABNVET.I

The unknown connector here. This is more to the drivers side and to the very back by the firewall. Anyone know?

brandon1566

same thing happend to my car tonight!! Im angry I sent it in for the column lock bypass because I got a recall in the mail it was a mistake. the car starts and runs for a few seconds if you touch the gas it will kill and computer says service column lock system

WKMCD

Check out these posts. I had the exact same symptom.

http://forums.corvetteforum.com/show...r&forum_id=103

http://forums.corvetteforum.com/show...r&forum_id=103

http://forums.corvetteforum.com/show...r&forum_id=103

Good Luck.

ABNVET.I

Read all the posts WOW what a trip you had to fix yours. You said "It turns out it was a mechanical problem with the pins on the column lock, not directly related to the recall. " Do you know what they did to fix this?

ABNVET.I

Did the resync of the PCM BCM 15min on 30 sec of 3 times. Same problem. After the resync I start it it runs fine for a few seconds the dies i check the codes immediately and get PCM P0102 H that is because I have the MAF disconnected at this time. The only other code I get it RFA U1016 Loss of Communication with PCM. But if I clear it it goes away. I still find it odd it dies when I have 58psi of fuel pressure all the time. That never changes.