Fuel Pump Issues

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project_evo

New Member
Messages
2
Hi there, I am a newbie so apologies if I am posting in the wrong place but I am need of a bit of help!

I have an Evo IV which needed the clutch replacing so to do this I removed the engine changed the clutch and cam belt while it was accessible. The engine is now back in and cannot start it anymore as the fuel pump doesn't appear to kick in. Below is a list of checks I have made with my findings:

Fuses ok
Checked both relays which are fine
Resistor measures fine
No errors on ECU
When turning key I am getting 8V to relay 2 but it will not switch over. Pretty sure this is due to the ECU because if I bypass it the relay operates.

Is there anything in the ECU that will allow relay 1 to operate but not relay 2?

Any guidance would be much appreciated.
 
RsvRob

RsvRob

Well-Known Member
Messages
2,882
Location
Beds
Hard wire it.
The relay is then used as a signal only and doesn't power the pump directly.
So it should all work.
 
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project_evo

New Member
Messages
2
Sounds like a plan I will give it a go, but a quick question about that. On the plug to the fuel pump there looks to be 6 wires, one being a live and another the ground but what would the other 4 be?
I would also like to figure out what's currently stopping it at the moment still as it ran ok before I took the engine out so would be nice to know what I have done wrong.
 
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