My big fuel pump mystery / problem.

[FeaRpb]

I pulled the pump, rewired it to the bulk head. Hooked a fuel hose up to the out going line on the pump and nothing came out during the cranking. It sounds like the pump is spinning really slow. I am looking up the relay info right now.


EDIT:

I went and followed this http://www.stealth316.com/2-fuelpumprelaybypass.htm Nothing changed, the pump still sounds the same. I will take a break from it tonight and go BBQ some food. Get back at it tomorrow.

And I wouldn't say I am throwing parts at it. When I said I went through 3 pumps that is in the lift time I have owned this car. 1 is the stock pump, the 2nd was a knock off walbro and the 3rd was a used walbro to get the car running (lasted longer than I thought) and now I am where I am at. Seemed logical to buy a pump since the last one stopped flowing.

On that note, anyone want some BBQ and beer?

[J. Fast]

You get what you pay for. Don't buy cheap knockoff performance parts or used parts for critical components. 9 times out of 10 there's a reason why someone is trying to get rid of them.

Buy a new pump and doublecheck the wiring to make sure it's been installed correctly, also check and make sure none of the wiring posts on the hanger are damaged. I've literally seen the posts snap which can result in shorting the pump in the gas tank (which is a bad thing).

A few other things to note... Do you drive with your gas light on often? High flow pumps get really hot and need adequate fuel levels to keep them cool so they don't overheat. Second, the gas tank also needs to have adequate ventilation so as not to turn the gas tank into an oven. If you've done a vac reduction and have the tank vent blocked it could lead to problems in the long run.

Cheers.

Jeremy

[GTOJOE]

Actually there is a fuel pump diagnostic port in the corner near the firewall [pass side for UDM market] which allows you to power up the pump. I believe it's the blue connector and you just jump the 2 pins to create a circuit..... check your sevice manual first though to make sure that's correct.

Steve - do you know the formula for the fuel flow calculation cus I posted he same suggestion above but don't know the correct flow rate.

[GTOJOE]

LOL didn't think of that hahaha

[wraith]

Its probably the pump just replace it. I went thru the same issue but had a Denso Supra and felt it could not be the pump and replaced relays 3 times and somehow it would work for a little while and the relays did go bad for some reason. The pump ended up failing for good after a year or two of this.

Sam

[FeaRpb]

I emailed them, hopefully they get back to me soon. But I did end up modifying the fuel pump housings bulk head which I think is pretty cool now. I think I can fully swap my pump in 8 mins now.

[J_Parker]

As for the formula guys, all you have to do is get your L/H and divide by 60, then half it for a 30 second cranking time at full voltage. Pretty simple lol.

I would say your pump is probably shot, try the new Aeromotive pump with the hotwire kit, I hear very good things about them!