zd30 common rail severe lose of power very hard to start

[happygu]

Have you checked the fuel lines for any moist spots, which would indicate a split or air leak?


Have you checked the fuel filter is sealing properly?


It sounds like you may have air in the fuel line, although then it might not run at all .... very perplexing

Mic

[pootrol07]

I have checked the relief valve and that is passing, trying too check current from prrssure sensor to ecu, i dont have a complete circuit there cozmy dp chip isnt lighting up, i have plenty of fuel comming back threw the return line so the pump is ruled out, doing my head in, will be for sale as soon as its running

[patrolman123]

if u havent fixed it yet try dissconecting fuel pressure reg and try start it and see how that goes. dont drive it though. doing this will give rail full fuel and eliminate any pressure probs with rail or injectors. will sound very noisy but dont stress its normal when u do this

[pootrol07]

Just replaced the whole rail....and still not winning. Sending the ecu off for testing as I have current going up the negative wire to the fps. Very costly exercise! Not a happy patrol owner

[patrolman123]

Have u checked for shorts? ? Where did u test that current from in the loom? Try checking it at ecu. If your any good with wiring try removing pin from ecu connector and test straight outta the ecu.

[patrolman123]

Also try disconnecting the dp chip and put it back to factory to eliminate a problem with the chip

[happygu]

I have checked the relief valve and that is passing, trying too check current from prrssure sensor to ecu, i dont have a complete circuit there cozmy dp chip isnt lighting up, i have plenty of fuel comming back threw the return line so the pump is ruled out, doing my head in, will be for sale as soon as its running

I would be looking for the problem where the DP Chip doesn't have power, or doesn't have the LED on .....

[pootrol07]

Sent the ecu off to get checked, ended up being fried.
Got a new ecu and programed the key ect, not have fault code p1625 which means i have to recalibrate the injectors to the ecu. Will be doing this tonite

[threedogs]

that's sounds good, did they say how it got "fried"
So you're keeping it now ???

[pootrol07]

They suspect the dp chip sent power down the earth wire which took out the earth on the ecu on the pressure sense side of things but they said they couldn't be 100% sure. Sent it to injectronics in Melbourne.
I couldn't get the injecterz calibrated as they scan tool i was using isnt up to date so i have to now take it to nissan.
Gonna keep it now as it owes me $4500 in the last 6 weeks