1999 F350 7.3 diesel 150 k miles. Service engine soon light comes on at start up. Run smooth at 750 rpms. If I push on the accelerator peddle the rpm will shoot up to 1500 rpms and go back down to 750 with the peddle held down. After approximately 1 minute the engine will serge (kind of catching itself from stalling) and then will run with a miss rough at idle 750 rpms. The SES light goes off at this serge. I have recently changed glow plugs, valve cover gasket/wire harness, added anti gell to fuel with a full tank of fuel and changed the Fuel filter (which didnt look bad but I did it anyhow. Starts good now with new g plugs in the cold. At times the engine just quits at the serge when the Truck does not catch itself. Some times the ses light is on from start up and I will drive it down the road and all of a sudden its like a potato gets blown out of the tail pipe with a serge in power and the SES light goes off. Will then run OK. It also was as though I was running out of fuel even though showed 1/4 tank and I filled it up and ran OK for the rest of the trip approximately 1 hour more. Does this sound familiar to any one.

 

Moved to the 1999 - 2003 7.3L Power Stroke Diesel forum.

 

Obvious question would be what is the code...Kinda sounds like an injector or 2 not firing while cold, will it do this if it has been plugged in for a few hours, or after the motor is up to operating temp?

As for the 1/4 tank acting like it is running out of fuel, that is pretty common if the intank duckbill is cracked, or the pickup foot is missing or broken.

Is the engine oil full?

 

The engine oil is full changed 100 miles ago. I have the truck inside warm and will see this morning how it runs and then over for the codes. I will post when I return.

 

These are the codes that were pulled:
p1280
> p1690
> p0500
> p1670
> p1316
> p1248
> p0470
> p1211
> Abs memory codes
> C1145
> C1230
> C1237
> C1148
> C1229
>C 1226
> Gem sjb memory
> B1840
> B1371
> B1318
> B1446
> B1476
>B 0500
> B1203
> B1201
The truck ran the same today. Started out as I have listed above and then when warm ran quite perfectly :-)
What's up with these codes?
Where is the link to the list of Descriptions for the codes?
Thanks for the help.

 

Did you clear the codes, and those are what came back?

 

These were the codes that were there. They cleared them and then I drove it for the remainder of the day. When running bad, runs like running out of fuel, shaking serging violently then when warmed up runs fine. I guess I need to go get the codes checked again in the morning to see what still comes up.

 

the P1316 means that the IDM has stored codes, here is a link to codes

Welcome to guzzle's Diagnostic Trouble Code list Web Page

you have some codes for injectors as well as high pressure oil, I would clear them and see what comes back first. Can or have you performed a functional test Buzz test, or cylinder contribution test?

 

Sounds like a loose UVCH. With P1316, that is where I would look.

 

I have checked the uvch on the pass. side yesterday and all was tight. I have been reading a lot of info on the ipr and the hpop leak. I have an indication of a rear seal leak but I replaced it last year while changing the Torque converter that disintegrated. Maybe the hpop. I don't have the capability to do the functional tests listed above. I will have the codes checked in the morning and check back. Sounds a lot like the IPR valve based on my reading of the forum pages.

 

My initial guess would be worn injectors, but in no way am I suggesting you go purchase new ones until proper testing. How many miles on them? What is your location? HPOP is not a common failure really and could be verified with a scanner if someone was near you.

 

I am in the Ann Arbor area Michigan. Would the worn injectors be intermittent? 150 k miles. How about the ipr valve

 

Is your issue intermittent or every cold start? IPR is a more common issue than HPOP thats for sure.

Maybe someone will see this that is close and could run some tests for you. Little far of a drive for me.

 

What is the actual test for the IPR? Seams like the last four cold starts the same. Also remember last year the same cold problem then worked itself out when warm than I forgot about it because I didn't use the truck that much in the cold months.

 

You could use mechanical gauges plumbed to the oil rails to watch Injector control pressure while accelerating but you would not know the duty cycle of the IPR. So the best way to view those is with a diagnostic scanner that can view live data.