Fuel pump not running. - ZR-1 Net Registry Forums

mmkkpro · 05-31-2020

Hi guys, I have a question about the fuel pump/pumps.
Shouldn't FP1 be on with ignition switch on?
I have been chasing a miss, so I figured I would test each fuel injector by way of MH, procedure,grounding each pin at ecm connector A. However my fuel pump does not power up with switch on. When I start the car both FP1 and FP2 are working and I have 46 lbs. Idling. I have the FSM and have been studying it, and it says both pumps are energized on start. Every car I have worked on the fuel pump comes on with switch to the on position and shuts off when correct pressure is reached. Any help would be appreciated, thanks.

05-31-2020	#1
mmkkpro Join Date: Apr 2019 Location: Supply NC Posts: 123	Fuel pump not running. Hi guys, I have a question about the fuel pump/pumps. Shouldn't FP1 be on with ignition switch on? I have been chasing a miss, so I figured I would test each fuel injector by way of MH, procedure,grounding each pin at ecm connector A. However my fuel pump does not power up with switch on. When I start the car both FP1 and FP2 are working and I have 46 lbs. Idling. I have the FSM and have been studying it, and it says both pumps are energized on start. Every car I have worked on the fuel pump comes on with switch to the on position and shuts off when correct pressure is reached. Any help would be appreciated, thanks.