Steenracing

Hello i have a 89 civic si and my fuel pumps not priming. 1st My main relay is good clicks when key is turned on, @2nd checked all fuse's and every one is good,3rd All grounds are good,4th I checked the connection that the pump plugs into and I'm getting a reading of 7.5volts W/ a semi drained battery. also the car had the pump replced with a walbro 190lph about 10 years ago . Do you guys think the pump is bad?? Any help is appreciated.

woodenchef

Well if your getting power to your fuel pump and it still is not priming when the key is in and you said your main relay is good. Then bam you solved you own problem replace the fuel pump. If you have power there and all the electrical is working your fuel pump SHOULD work. 10 years also the fuel pump is probably pretty old by now. I'd start there.

Steenracing

Ok thanks wasnt sure if it could be anything else didnt want to have to drop tank hehe

Steenracing

UPDATE!! Replaced fuel pump and still nothing, i have to pm6 computers ive tried and nothing anybody have any ideas ??

Steenracing

Bump anyone? ... I really cant find the thermostat ground anywhere .... idk if its because the swapped motor (dohc zc) but any suggestions would be appriciated.

jlicrx

Steenracing

Found it , looked good .. id like to say again im getting power to the connector where the back seat would be ... so could the wiring going to fuel pump be bad ?

Steenracing

Bump!

Steenracing

Bump really trying to get this going

jlicrx

which connector are you checking? - 5-pin or 2-pin?

Steenracing

I couldnt tell you off hand ill find a diagram and get back to you ... if you dont mibd me asking whats the difference ?

jlicrx

the 5-pin connector has the wiring for the pump - the 2-pin connector has the wiring for the gauge sending unit - you could have power for the gauge sending unit and have no power for the pump