What does the truck do when the rail pressure sensor goes out. I installed my stage three cp3 and the truck ran better than ever. Rail pressure was way up, idled smoother, and there was a lot more power. I took the truck down and washed the engine and it still ran great all the way home(about 5 miles.) An hour later I went out to dinner and about 3 miles from the house the truck started fuel knocking and died. I restarted it and it was still fuel knocking and would hardly idle and the cel was on. I checked the codes and found p0192, p0251, and p0524. 192 is rail pressure sensor voltage to low. 251 was a code for the fca. 524 my smarty said unknown code. cleared the codes and checked the connections. found water in the rail pressure sensor so I blew it and the plug out untill they were dry and no change and the 192 code came back. bypassed the rail pressure gauge and my pressure box and pluged the original harness into the rail pressure sensor and still runs the same and the p0192 came back again. Any help would be great and sorry so long. Thanks, Joe

 

Joe, put di-electric grease on all RP connectins. Should help!

 

Call Floor it!

 

I did the same thing last spring, washed the engine, drove home and a few blocks away from the house, it would barely run. Checked the codes and sure enough, a rail pressure sensor. The factory electrical connection is sealed, but the plug on my Quadzilla harness wasn't and when the water got in, the sensor went out. It's a 2 minute job to change it, but pretty costly. The guys at Rochester Fuel Injection were great when it came time to order a new one.

 

Put di-electric greese in all connections and still the same problem. Hooked the rail pressure gauge back in and it says the rail pressure is 5 to 6k. When I started it this morning it loped like it has a huge cam and when I tap the throttle it revs like I floored it. It also smokes black at idle. Any more help would be great. Joe

 

Sounds like your FCA took a dump...Call John!!!

 

Doesn't sound like that to me. He has a Quadzilla rail pressure gauge and he washed his motor.

You probably have the same harness most of us did with the RPG and it lets water in thru a spot on the connecte where 2 wire come out of 1 hole. Tends to fry the sensor.

Do a search for quadzilla rail sensor and you'll get all the reading you need.

 

Does any one know how much a rail pressure sensor is, and if they are available anywhere besides dodge? After chasing ghosts all day and checking every connection on the darn truck. Also swaping the stock cp3 back in I was left with the p0192. I had 2 codes for cam sensor, a water in fuel code which the **** stock fuel canister with that sensor isn't even in the truck any more. All the codes went away for no reason except the p0192. POS dodge computers.

 

I think you need to unhook the DR.P its wet and thats where your problem is, I had the same thing happen

 

I unhooked the dr p box and the rail pressure gauge and it didn't make a bit of difference. Thanks for the thought and reply.
Joe

 

I also had a code 192 engine quit after washing it. Cleaned the sensor terminals, blew it out with compressed air and cleaner, packed it with dielectric. It may run half the day then quit. No start code 192. Wait 5 minutes and it would start and run fine. After 3 days of not knowing when it was going to quit again I replaced the rail pressure sensor. The problem is now gone. I bought the sensor from Dorman $285.

 

Oh yeah, it would only quit while idling or if your foot came off the accelerator pedal when going to a stop, then quit code 192. It left me sitting in traffic 3 times before changing it

 

you can get one at genosgarage.com for $207

 

FCA Valve

 

What was the fix I’m having issues and a p0192 code also
new FCA no improvement