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Tom Lea
Tom Lea

(3 posts)

04/11/2012 11:28PM

Main British Car:

1994 GM 3.4SFI V-6 PCM/Fuel Pump question
Posted by: Tom Lea
Date: December 06, 2018 08:24AM

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
Columbus, Ohio
(548 posts)

10/25/2007 11:30AM

Main British Car:
1968 MGB GM 5.3 LS4 V8

authors avatar
Re: 1994 GM 3.4SFI V-6 PCM/Fuel Pump question
Posted by: Scott68B
Date: December 06, 2018 12:35PM


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


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