fuel problem HELP!!!

when i try to start the truck it runs for a few seconds under moderate throttle then the fuel pressure drops and it dies.

its a new harness
new walbro 255 pump with ractronix hotwire kit
using an autometer gauge

when i turn the truck on it primes to liek 49 psi when i crank it starts to drop and sometimes will run 2-10 seconds then the pressur drops to about 20 psi and it cuts off. if i leave it on after priming while not trying to crank it sits there and creeps down maybe 1 psi every 10 seconds or so. could the regulator be bad?

before i pulled my old motor i ran it with this pump and it seemed to hold up fine but under high boost i was having pressure drop so i dont know where to start really.

i wouldnt think a brand new walbro would be bad?

need some help on this one

edit: its also smells like its pumping out a good amount of fuel when it is running

click the video and it will show what its doing.

http://img.photobucket.com/albums/v1...1-11-57-43.jpg

bad regulator?
i had a similar issue on mine and once it was the fuel pump, once it was the regulator. btw.. that truck sounds beastly in the garage..

Quote:

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Originally Posted by MidwestSS

bad regulator?
i had a similar issue on mine and once it was the fuel pump, once it was the regulator. btw.. that truck sounds beastly in the garage..

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haha yeah it rang my ears with just the open headers and scared a few dogs.

so how do i check the regulator? i tried hooking it up and unhooking it and it seems to make no difference. it was all pulled and ran before i bought the engine could it have went bad just sitting there or maybe because it was dry for so long with no fuel in it?

i checked the voltage to the pump and the ground and both are fine so i dont think thats the problem.

is there a way to check the regulator without having to go get another one? i googled it but all i found were people testing while the engine was running and mine wont run that long lol.

i think you can remove one of the lines of the regulator and see if it pisses fuel..

well i dunno what was wrong but talked to alan and he sent me a diff tune and i got it running now! joker is so loud though!!!! cant wait till friday and i have my exhaust put on!