My big fuel pump mystery / problem.

[FeaRpb]

Wall of text incoming!

So last night I replaced my fuel pump for the 3rd time. The other 2 went out on me, not sure why but I am thinking its because I ran it with low on fuel and it possibly seized or something. (Im not really sure if thats possible, just an idea) But last night I replaced it again (I am using walbro's, the other 2 pumps were walbro's also).

On the drive home the car stalled out about 50 yards from my apartment complex (My guess is from fuel as there was only about 2 gallons in the tank.) But I was able to start it back up by popping the clutch when I was coasting very slow. I parked it and went to a friends house to help him find a boost leak.

This morning I go outside and see if it starts up, It gets a few chugs and then just cranks. Turn the key back, turn it back on, few chugs and then crank crank crank. WTF I tell myself, this is a brand new pump installed last night. Hmmmm

So on that note, would anyone have the slightest idea of what is going on? Is it that I am messing up the pump by only having 2 gallons in at the time? Or am I just cursed with bad luck?

Any information would be helpful as I am moving at the end of the month and my car needs to make it to my new place and my job once my carpool buddy resigns.

Thanks in advance guys.

[GTOJOE]

is it hotwired? maybe your wiring is bad and frying your pump? Have you confirmed it is infact the pump?

[FeaRpb]

I don't have it hotwired. And I haven't even had time to really check. I am just guessing its the fuel pump as it seems to be the same symptoms as the last time it died. Also the car mods just for note are bpu at best. Just trying to get some ideas on what to check for when I get home from work today.

(Also the reason I think of the low fuel thing burning up the pump is because this has only happened when my low fuel light was on)

[GTOJOE]

When you replaced your last pump did you apply power directly to the last pump to see if it was working? Maybe your problem is not the pump but the relay or resister thingy [sorry can't remember the correct name lol]. I would do the hotwire and try again.

[FeaRpb]

I will go with the hotwire idea and see if that helps. But would you have any other suggestions before I spend the money? (Basically broke until the 15th =(, Damn stage 2 heads and security deposit)

[GTOJOE]

You can do the resistor bypass with will cost you like 5c LOL this will bypass the low voltage setting for the pump and run it at full power 100% of the time. However it will still use the stock wiring. You need to do the bypass for the hotwire anyway so start with that. Otherwise get someone to crank the car and listen to the pump. It's a Walbro so you should be able to hear it even when cranking. If it's running then your problem could be something else. Check spark? There is also a way to measure fuel flow by removing the fuel line off the regulator and cranking for 30 seconds and measuring the fuel that comes out in a jug which will tell you if it's flowing enough. However I cant remember the formula for this. Obviously this will only work if the pump is running hahaha.

[FeaRpb]

I will remove the high pressure line and see if anything comes out. I may rewire the assembly and see if that helps. I honestly wouldn't care about the problem as I am in the progress of a build for it, but it is my DD right now. :facepalm:

[FeaRpb]

Bumping this for anyone else that might have information to add or another idea. I took the rest of the day off work to figure this out. So any other help our thoughts on what might be the issue would be nice. I am going to start working on this soon.

[mb3000]

MFI relay?

[stealthee]

Low fuel is not your problem. 2 gallons of fuel is more than plenty to keep the car running. I've put 19.5 gallons in the Stealth before and it only chugged and almost died on a sharp curve once.

As has been previously mentioned you need to do real diagnostics before you keep throwing parts at it.