buddy26

After throughly detailing my engine and installing my Quad X2, A day later my truck wont run(rail/ fuel pressure sensor) Could the Quad or washing caused this?

tcr

I doubt it, if you had a bad rail sensor your truck would still run, but not very good. Your idle would be really rough. Try and dry everything out with a leaf blower or air tank if you have one.

bighornram

Unplug the RP sensor and dry it out good with compressed air. These connections seem to be very tempermental. Apply some dielectric grease and reconnect it and see what that does.

buddy26

I did the compressed air and dielictic grease, it did get better but was still bad, so off to the dealer.

tcr

Just buy a new sensor unless it's under warranty. $175.00 from Cummins.

blwnsmke

Is it times like this that a rail pressure gauge comes in handy?

blwnsmke

Mine has been running kind of sluggish also.. I thought it was my rv so I capped it and its still kind of sluggish. When I had my tst on it and I flooring it would start sputtering and stuff.. I got a quad rail/fuel pressure gauge on the way so maybe that will tell me whats wrong.. I don't trip any codes and my truck idles perfectly fine..

tcr

My rail gauge is exactly what convinced me to buy the pressure s/w(erratic readings). Everybody else was saying it's probably the FCA, just because they're more vulnerable and pressure s/ws never fail. Well, guess what, they do!

blwnsmke

Your pressure sensor was bad? What was your truck doing?

kruegerlouie

i just finished my 06 ive been building, it had a eng light on and ended up replacing the rail press sensor,ran good, symptoms were: hard starting,very underpowered,and ran rough& Loud the press was 27000+ at idle. after this was fixed and i was enjoying my new truck(only 520 act miles) i decided to install my guages including a pricol rail press. after a few days the light came on and ran same way, unplugged the Y harness for the guage and then it ran fine again???? anyone had problems with their guages or a chip tha uses this electrical connection?? or with guage also.

homewrecker

Read some post on Comp D about Dipricol RP gauge causing problems.Some how backfeeding something into the RP cicuit.

blwnsmke

Im just going to wait til my quad gauge gets here and see what both rp and fp are reading and go from there with my issue.. I capped the rv already so I know its not that

mxg342

Yep. My Quad RP gauge just goes along for the ride now. It hasn't been hooked up in about 4 months. I've narrowed it down to something in the quad harness that isn't making connection.

tcr

Idling really bad, it'd die all the time and it caused the fca to run wide open when rp couldn't be read. What convinced me to get a 200.00 fuel psi sensor was the fact that my rail psi gauge would work then quit then work for a couple seconds then quit.

blwnsmke

hmm mine when your under hard throttle it will kind hesitate and pick right back up about 2 or 3 times..