I have a Quadzilla rail/fuel pressure gauge. For about a week now it sometimes says that I have 0psi at idle but under heavy throttle it will go up to 5 or 6psi and then back to 0 when I let off. I still just have the stock canister mounted lift pump and know I should replace it just haven't yet. But anyways, what do you guys think the problem is? The fp sensor or has the lift pump finally quit? Thanks.

 

the fp side of that guage hasn't worked right since it came out, If it did ever work for you than you are like the only one. I just use the rp setting on mine and thats it

 

Have you installed the new sensor form Quad?

 

there isn't a new sensor from quad for the gauge out yet. They are working on it being out in another month or 2 from what i read. there is a new transducer out for the commander or whatever its called but not for the gauge

 

yeah, i only use mine for RP....my fuel pressure reading has been junk for over a year...tried 2 diff senders, no change.....

 

My rail pressure gauge quit after 2miles on the road and I sent it back. I looked at it first and it had no solder on the number 4 transistor. I called them and they told me they were discontinuing the quad rail gauge. WONDER WHY

 

My fuel press. has not worked in over a year also. Does any of your guys trucks rev up when you shut it off? Mine does when my rail gauge is hooked up. Quad says they have never herd of the problem. I can't believe mine is the only one that does this.