Help! Very strange starting

[EEvette]

TedC,

I will go test fuel pressure and run another spark test...perhaps try another cylinder and reducing the gap. I will post results later this afternoon. Thanks for all the help, greatly appreciated.

 

[EEvette]

Ok, Just finished doing th fuel pressure tests, I found the following:

Turn key to on position: pressure reaches 42 psi then immediately drops to 0

Turn car on: fuel holds a steady 41-42 psi

Turn car off: pressure immediately drops to 0

 

[TedC]

EEvette, I copied this from another post... Pressure should not drop like that...

"There is a check valve on the tank pump assembly that holds pressure This may be bad or your regulator may not be holding pressure or possibly a bad injector bleeding off pressure."

 

[TedC]

EEvette, Here is what the 1989 FSM states...
Pressure that continues to fall is caused by one of the following:
1. Fuel pump check valve not holding (in the tank)
2. Pump coupling hose or pulsator leaking
3. Fuel pump regulator valve leaking
4. Injector(s) sticking open
With the ignition on, fuel pump runs for 2 seconds. Pressure builds and should hold steady when pump stops.

 

[EEvette]

TedC,

Thanks for your help. I removed (tried) the fuel rail last night to check the fuel injectors for leaks. I encountered a small problem, one of the torx screws that holds the cross pipe broke when unscrewing, it might have seized in place. I am sure I can remove whats left in there but the problem is where can I get another one of those screws? Any ideas?

 

[TedC]

Chevy dealer or auto parts store???

 

[EEvette]

Im gonna visit the chevy dealer hopefully they have something. Thanks TedC.

As far as the troubleshooting goes, I will keep you posted I know someone has the same problem. It might take me some time as I just got assigned a big project at work that will leave little spare time to work on my car......but like I said I will post as soon as I find something.

Once again thanks for all the help.