Where is the OCR relay

[smallstar]

I'm hunting for my fuel pump problem. Got a new pump, it works but only when I jump the FP to the battery on the test terminal. Jumping the B+ to the FP doesn't send juice to the pump. When I go straight to the battery, the pump starts and the engine will turn over and run for a few seconds. I'm trying to figure out what the deal is.

I've been told I could have a faulty Open Circuit relay, or a bad EFI relay, or...... a bad ECU modual

any help would be great!

 

[fourwd1]

Are you putting the Ign in the RUN position when you jump when you jump the +B and FP terminals?
That energizes the EFI relay which supplies the 12V to the +B terminal and the COR relay, which in turn supply +12V to the Fuel Pump.

 

[smallstar]

ignition in run

Yes the ignition is in the run position. b+ to FP, produces no volts to the fuel pump. But, FP straight to the battery does.

 

[fourwd1]

That points to either a bad EFI relay or an open in the wiring on the +B side of the relay to the COR/Engine Check Connector.
OR, if that 7.5A IGN fuse is bad, the EFI relay won't energize, so no +B to the COR/Chk Conn.

 

[fourwd1]

Oh yeah, the COR is located above the ECM behind the pass side kick panel.

 

[smallstar]

THankyou Thankyou... I'm gonna go straight to that in the morning.

 

[4Mogger]

I have been through 2 EFI relays-- I would replace that first.

 

[smallstar]

Yes!!!!!!!!

That points to either a bad EFI relay or an open in the wiring on the +B side of the relay to the COR/Engine Check Connector.
OR, if that 7.5A IGN fuse is bad, the EFI relay won't energize, so no +B to the COR/Chk Conn.

Thank you. It was the 7.5amp fuse, not the relay. I finished up replacing the line with fuel injector line, replaced the fuse and it started right up, no leaks.

:thanks::thanks::thanks::thanks:

 

[fourwd1]

Thank you. It was the 7.5amp fuse, not the relay. I finished up replacing the line with fuel injector line, replaced the fuse and it started right up, no leaks.

:thanks::thanks::thanks::thanks:

Glad I could help.

 

[Fixxer1956]

Howdy yall, same kinda problem, no power to EFI, not sure where the 7.5 ign or efi fuse is, this is a 95, checked every fuse I can find, initial problem was kind of intermittent in nature by the way. If I jump the efi relay it runs find but no power to the efi relay, the COR is functional but havent checked if its getting power. At wits end!!

I have no clue where the various test points everybody keeps talking about lol, guess I need a pressure washer first, everythings grimy!!