GordnadoCRD wrote:
P2294 FUEL PRESSURE REGULATOR 2 CONTROL CIRCUIT OPEN.
this code will pop up if you have an open circuit (disconnected or wiring problem related to the FQS on the back of the CP3.) The wire is a twisted pair all the way to the plug at the rear of the ECM.
Could Be:
-wiring problem
-connector problem
-bad solenoid.
If it disappeared when cleared and has not come back, it's almost certainly not a bad solenoid, could be an intermittent problem with one of the other two, or could be someone disconnected the FQS when running sometime in the past.
In bypassing the fuel filter head, you have lost the ability to bleed off trapped air. You should only have to do this 1 or 2 times at the most, but until you get it started it cannot purge the air by it's self. Once running the CP3 can finish the job.
Start there.
Have a charger or running jump on your battery.
Once you have clear fuel with no bubbles coming out,
Check that your fuel pressure sensor plug is fully locked in place (driver's side of engine where the air inlet for the intake manifold is) 3-wire plug.
Check that your fuel pressure relief valve at the rear of the rail wire is fully locked in place. (if your wiring loom hasn't been changed it will be a 2 wire plug that comes from the main loom along with a 4 wire plug that goes to the Cam Position Sensor at the rear of the exhaust cam.
Check that your Glow Plug Loom is connected, and all are plugged in.
Use the Snap-On tool in the proper mode (data only, no codes)
Set to fuel/turbo category, and scroll to where it shows Fuel Pressure Set Point and Actual Fuel Pressure. (they should be close together)
Use your foot or a block to have 2-6% accelerator applied. (as little as possible but Not dead idle)
Key on until all dash lights go off exc CEL
Crank until it fires OR about 10 seconds whichever happens first. If it doesn't start in 10 seconds, let it rest for at least 20, then key off, back on, and try again.
Have someone watching the fuel pressure. It should be around 3-4000 psi after cranking that long. It should also be very close to the set point.
To answer your Q.. IF a pressure regulator goes bad, and does NOT throw a code, you either have major wiring problems or a bad ECM. The good news is while possible, it's extremely unlikely.
One bit of good news is I find more and more fuel system parts on these that are shared with Dodge and Chev CRDs, both of which have lower prices than the Jeep.
Thanks for all the info. I bypassed the fuel head in hopes of getting it to start and ruling out an issue there. Before I put the lift pump on it would lose prime after 5 seconds of cranking. After putting the lift pump on it would be primed and as soon as you turned the key off if you pumped it manually it would lose prime after 3 pumps. (by prime I am referring to resistance when you pump the fuel head). It still will not start. It has less than 1000 miles on the new head, water pump, timing belt and glow plugs. I have all the paper work for the work that was done on it. It drove great during the test drive and died on the way home after buying it. It still has not thrown a code I can read. My friends SNAP ON picked up the 2294 when there was no CEL. I smoke tested the fuel system and there were no leaks. When it died on me going home it did not sputter. It died like someone just turned it off. That is what it did 4 times before it would no longer start. Due to work schedules it is going to be 3 weeks now before I can get to it again. I will check connectors and tell my friend what you said to check with his scanner. He is a diesel mech but has never worked on one of these.