Hello all first post for me so I hope i am in the right spot etc.
I have a 1997 7.3 with 230,000 had it for about 40,000 of those miles. Has run very very well up untill this point. I live in Maine and in the winter this truck fires right up plugged in or not. Once warmed up blows no smoke at all good mileage very quiet idle does not shake the cab at all. So onto my Problem. I was driving for about 1/2 hour and I pulled out onto a highway at didnt have a ton of room so I accelerated pretty good got 2 miles down the road started running rough. pulled into a gas station checked codes got p0344 so I continued to drive trying to make it the 4 miles home and got about 1 before I felt I wouldnt make it. Parked the truck at my friends and replaced the cps. was told it was a common problem. after replacement it would not start AZone part. returned it got a Napa part still no luck then bought the ford one still no start. it is very close to starting just about to but no dice. lots of white smoke. Fuel pressure while trying to start is over 30lbs. volts to icp while trying to start is 5 v. replaced fuel filter tried both tanks. Today I replaced the uvc harness on the drivers side(it was burnt on what appeared to be the glow plug wire) the only other thing that is wrong is the staering collum is in pretty rough shape. and it still is throwing the code p0344 after reseting them several times but I have to crank for a extended period to get a code. Any ideas?

 

currently working on same problem but 1996 model. This one runs and kills after entering closed loop, cools down and restarts. I`m getting the same code now after clearing up some other problems like IPC &back pressure sensor replaced IPC & cleaned back pressure sensor cleared the codes. problems went away but still kills after warming up good. I am currently waiting on anew pcm (computer). reason for that is it will not let me read datastream on my scantool so I decided to replace PCM before I went any further with diagnostics. I don`t trust the cam sensor code with A PCM acting up.but in your case the cam sensor san possible be keeping it from starting. Let me know how you make out and I will do the same in A few days when my computer comes in. But I`ll tell you if you replace the cam sensor and it doesn`t start it is most probbably going to be the PCM. just for fun spray A little gas in the intake if it starts it may just be injector control module. hope this help you out some your problem could be a number of things I`ll let you know more as I go please do the same. It allways helps to talk it out with someone.
allways, STUCK IN DIAGNOSTICS

 

Will do thanks for the reply. I have given it some wd 40 squirts but still not starting will let you know how I make out

 

check you idm and pcm fuses in the fenderwell and be sure you here the relays click. I had a bud with a bad idm relay changed it and fired right up.

 

Your 0344 is probably just from extended cranking... very common.

 

wich one is the idm relay and when does it click when I try and start it?

 

fuse 8 idm
9 pcm i
dm relay #2
should click on when you turn the key.
check the voltage on the glow plug relay (both big terminals) for voltage.

 

Never had much luck with wd-40 put a little gas in a spray bottle. I think you will like the difference between this way verses wd-40.

 

I say check your IDM. If you have a buddy that has a good running diesel, then borrow his idm and see if your truck cranks.

 

Thanks very much everyone really appreciate your help!!!! Put a new IDM and it fired right up and sounds great!!!!