nlpy8b

Can't get my c6 corvette to crank during compression test.

I have the coils, injectors unplugged. Fuses/Relays removed just to be safe.

All plugs are removed.

Throttle body stuck WOT.

Attached compression tester to cyl #1 and then try to crank motor over with push button ignition......

Nothing!!!!

Can't get to the crank pulley with my procharger setup on it to manually crank.

Is there some kind of electronic safety device that is keeping it from cranking? Please help!!!

Thanks.

2xLS1

iTrader: (25)

No need to unplug the coils or injectors. It is probably setting codes with those unplugged. Just pull the fuel pump fuse. And if you are manually holding the throttle open instead of using the gas pedal that may be causing a fail safe issue. And holding the throttle open with the pedal should make it go into clear flood mode where the injectors don't even get pulsed.

nlpy8b

FYI- It was the throttle blade being blocked WOT.

Plugged everything back together and unblocked the throttle blade, then pulled the Fuel pump relay and it worked fine...

Too bad the motor had already cooled down by the time I figured it out.... still got the results anyhow but think they where erroneously low average based on the cold test.

Hope this helps someone else in the future, should have only taken 20min.