what do u mean?

 

Id like to know if my fuel pump was actually pumping fuel myself, so I'd rent a fuel pressure tester and see if it's actually doing just that.

 

Try bypassing the ballast first.

 

ballast been bypassed

 

Okay, time to "rent" a fuel pressure gauge. You can rent them from AutoZone* or O'Reilly's.




*I wouldn't recommend replacing your fuel pump with one from AutoZone. They sell AirTex and AirTex are $#!Te. Get it from NAPA or find someone who sells Bosch.

 

Agreed, pick up a fuel pump and kill two birds at the same time. Hope it works for you.

 

ok got me a test gage from Vatozone, hooked it up, cranked it and had 0 pressure

also tested the plug going to the pump for voltage and got 6.58volts

so now my question is should i get Carter brand from my local Napa which costs 75$ with a sock or Bosch which costs 110$

or just one from Vatozone for 89$ with lifetime warranty?

 

6.58 volts with resistor bypassed don't think that's enough juices test b4 and after by pass connection first .

 

This might wanna be done ....

 

I'm on my phone and can't see a profile so I don't know what year you have, but maybe you just have a clogged fuel filter?

 

Could be bad or you just have a bad blockage somewhere or the injectors aren't working etc. Did you spray some starting fluid in the intake just to see it fire up? That would confirm a fuel delivery problem is to blame but I guess air and 0 psi fuel pressure already confirms that.

 

I've heard no horror stories about Carter. Bosch is obviously the most popular and there's a reason for that but I would guess that you'd be fine with a Carter.

On our Renix the fuel pump relay is located under that black plastic cover behind the battery. There is some debate as to which relay it is but there are four in a row and most say it's the first or second from the front. However, you mention that you can hear the fuel pump running/priming so that means the relay is probably okay.

A clog is certainly possible but the odds suggest it's the fuel pump. Mostly because I've never read of a clog in the fuel line or filter causing a fuel pressure reading of zero. I have, however, read a hundred accounts of a failed fuel pump causing it.

 

I just climbed under mine and probed the fuel pump plug. I get a constant 6.84v on the center pin and an initial 12v on the outer pin but within a second or two I hear the click of a relay (somewhere?) and the voltage drops to 0 on the outer pin. Center pin remains at 6.84v.

 

That's right, the jeep hasn't started so it's been either turned off probably by the ASD relay ( just guessing don't have a schematic) or the pump pulses on/ off. Your pump is working as it should.

 

Any progress?