wallyman424

So I've plugged everything in, and I gave it a crank.

It cranks freely, but does not fire. There is fuel in the rail. Its spitting out codes P1275 and P1276. I have no idea where to go from here.

Please help.

UPDATE: Already fixed guys. Thanks for the suggestions. It was a bad ground connection.

RX-Ben

I assume you know these are (gas pedal sensor issues):
P1275 APP Sensor 1 Circuit
P1276 APP Sensor 1 Circuit Performance

Info on the system, w/schematics and pictures:
http://chevythunder.com/drive_by_wire.htm

Check voltage/continuity/plugs/etc.

wallyman424

Yeah, but the gas pedal was fine before all this stuff, it just doesnt make sense that it would have up and died.

drivinhard

I think I've got a spare TAC module and gas pedal/APPS if you think it's related. Can bring to VIR.

All grounds good?

And stupid question, but is the TB servo connector hooked up and tight?

wallyman424

Fixed it. I'm smarter than the GM manual.


SEE ALL YOU SUCKERS AT VIR

BERETTA

Check the throttle actuater fuse (tac) in the underhood fuse/relay box first..

davidfarmer

2 of the wiring harness's have the same connectors, and I've plugged them opposite before. Cranks but no fire.....

Bills Z06

Glad you got it going!

Jason

That's what I'm talking about.

sperkins

I say it's a bad ground connection.

wallyman424

Put out 2 more "fires" this AM.

1. Forgot to put those little water crossover plug blocks on the back of the head. Luckily they can go on without removing anything

2. Was overheating at idle. Required very aggressive burping maneuvers to get the air bubbles out. Now idles cool.

At work now. Car should be ready after a couple more hours of labor this evening, then I can haul out to VIR.