callum

I just put my mechinical isspro fuel pressure gauge in. I put it in the post filter port on the top of the fuel canister. At idle i'm getting about 7psi and when i touch the go peddle i go to 0psi!!! You think this is right?.... i don't have any leaks in the line i installed! If this is my FP what do you suggest i do???????????Thanks guys!!'
Callum

gaRam

i have the same problem. there is a post in engine and drivetrain where someone just put in their gauge and he has that problem. we need new lift pumps. mine is going in tomorrow. i hope that one will be a good one and last a little while. gauge should be good.

callum

what kind are you putting in??

gaRam

i have put in isspro gauges. the lift pump? one from napa. they are giving me one free because the last one i bought had a one year warranty.

callum

is there any use in getting a new lift pump ? or should i just eliminate it and o with a FASS? The lowest price i can find is $549...i'm assuming that comes with everything i need???or what else do i need to buy too? Also how would i bypass the stock LP?? Thanks!!

Please do not say "search posts" , Ive been searching for 2 hrs now!!!

Shovelhead

With your current mods, I'd replace the Stock lift pump.
If your plans include larger injectors, and/or a more agressive "Box" I'd go with an Aftermarket upgrade.

callum

Yeah i plan on going with some bigger injectors and a mad ecm here in the not so distant future!!! So what do ya think??

Shovelhead

Drop the BIG bucks now, or have to do it again later.

Your wallet, your choice.

callum

okay i just as well go ahead and do it.......what else will i need to buy with it?bigger fuel lines? and how do you set it all up where it doesn't go through the factory lift pump?

Shovelhead

DieselDude4X4 has the FASS system.
He might have the answers you're looking for.

You can send him a PM here.
DieselDude4X4's PM Box

callum

i sent him a PM! thanks shovelhead!

Patrick Campbell

Guys,

I just installed an AutoMeter electronic fuel pressure gauge. I am trying to figure out if it's the gauge or my lift pump. I was reading 1 PSI at idle and 0 PSI at anything other than idle (YIKES!). Changed my fuel filter and vacuumed out a bunch of sediment crap at the bottom of the fuel cannister (have been running a lot of biodiesel for the first time lately ) and now it shows a whopping 1.4 PSI at idle and again 0 PSI at any speed. The gauge DOES do its calibration routine at start up (flips back and forth from 15 to 0 a couple times). Any way I can tell if my gauge is good? Can I get a cheapo mechanical pressure gauge and hook it up under the hood to see the idle pressure on that vs. the electronic one?

I recently bought a Carter 4601 HP fuel pump that I was going to mount aft towards the tank and put AFTER a nice Racor fuel filter but if my fuel pressure is really 0 PSI I will throw this thing in the stock LP location and worry about modifying it later ... Anyone know what I need to put my 4601 in the stock LP location?