11-21-2006, 08:19 PM
Join Date: Aug 2002
82 crossfire 305--why won't fuel pump run when ignition turned "on"???
Here's my setup:
1982 Camaro w/305 cross-fire injection, auto tranny, completely stock.
My fuel pump will not operate when the ignition switch is turned to "on" as it is supposed to. Obviously, this makes hot-starting the car impossible, due to vapor lock. When the "G" terminal on the ALDL is powered with battery voltage, the pump runs fine, and then the car fires right up.
Here's what I've replaced so far:
All rubber parts of the fuel lines
Fuel Pump Relay
All fuses in the fuse block are good. The computer diagnostic is not showing any stored trouble codes.
I've tried to decipher the engine control system schematic in the Haynes manual... and the "fuel pump/oil pressure switch sender" is the only other thing I could imagine is causing the problem. But if this were the case, shouldn't my oil pressure gage be inoperative? The oil pressure gage has worked flawlessly, and even registers plenty of oil pressure both when the engine is cranking and running.
The only other thing to check would be the 20A inline fuse... but I have no idea where it is. The only thing that looks like a fuse is an inline disconnect off an orange wire that comes off the battery and goes toward the engine computer.
Any help you all could provide would be greatly appreciated!!!