1994 GM 3.4SFI V-6 PCM/Fuel Pump question

Started by Tom Lea, December 06, 2018, 08:24:16 AM

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Tom Lea

Connector A of the 94 Camaro PCM has two fuel pump system connections. Pin 8 and Pin 6. Pin 6 looks pretty straight forward. Voltage TO that pin should be battery voltage as soon as the relay is engaged. Then, I assume, Pin 8, "Fuel Pump Request" is voltage OUT to energize the relay and the blk/wht connection on the relay is to a good ground. SO, Pins 85 & 86 on the relay coincide with Fuel Pump Request from the PCM and Ground. Pin 30 would be B+ and Pin 87 would be power to the pump. Am I correct in assuming that the PCM initiates a Fuel Pump Request as a function of turning the key from OFF? Phew..................... ALMOST THERE with the project.............. Thanks in advance............


Scott Costanzo

Tom,

What does your wiring diagram say? It should be detailed there.

Scott