2003 6.0 psd cutting out
#21
08-08-2011, 08:09 AM
I know it's frustrating, and made even worse when you have technicians working on it who couldn't diagnose squat to begin with. Let's think about this rationally, and I bet we can get you an answer in a few days (depending on how long it takes you to respond to questions, cause I'm on this site way too much!) 
Please give me the exact codes the truck is throwing, and we need to know what mods are on the truck.
It's an 03, with an egr delete...
Programmer?
How does the truck start in the morning? Does it crank long? Does it smoke once it's started?
Do you have any gauges? My first step here would be to hook a fuel pressure gauge up to the fuel bowl and see what you're getting. Ideally you'll need to see fuel pressure with a load on, so not just sitting idling in the driveway.
How is the truck primarily used? Grocery getter, or hooked to a 5'er all the time? Did this issue arise out of no where, or has this been some sort of gradual thing? Any parts replaced recently?
Cam is gear driven from the rear of the motor, motor would need to be pulled, or if the trans is dropped you can access the rear too. (just an FYI thing).
What are you reading codes with? If it's just a handheld programmer I would certainly be getting it hooked up to Autoenginuity or IDS from a Ford shop. Who is doing the work on the truck now? Not a Ford house? (can't really blame ya).
Answer these questions and lets go from there.
Please give me the exact codes the truck is throwing, and we need to know what mods are on the truck.
It's an 03, with an egr delete...
Programmer?
How does the truck start in the morning? Does it crank long? Does it smoke once it's started?
Do you have any gauges? My first step here would be to hook a fuel pressure gauge up to the fuel bowl and see what you're getting. Ideally you'll need to see fuel pressure with a load on, so not just sitting idling in the driveway.
How is the truck primarily used? Grocery getter, or hooked to a 5'er all the time? Did this issue arise out of no where, or has this been some sort of gradual thing? Any parts replaced recently?
Cam is gear driven from the rear of the motor, motor would need to be pulled, or if the trans is dropped you can access the rear too. (just an FYI thing).
What are you reading codes with? If it's just a handheld programmer I would certainly be getting it hooked up to Autoenginuity or IDS from a Ford shop. Who is doing the work on the truck now? Not a Ford house? (can't really blame ya).
Answer these questions and lets go from there.
#22
08-08-2011, 09:27 AM
Arp suds no programer now took off codes 2614 2617 not much pulling mainly empty and the prob started instantly while I was passing a car. Had my foot in it. Just did the studs and egr also 2 new injectors. Ran fine for two weeks then bang prob. Sorry about typing on phone not computer
#23
08-08-2011, 09:48 AM
Since it happened out of no where, and I've seen those two codes before...
Those are output circuit codes. The CMP and CKP signals are provided to the FICM from the PCM for injector timing.
Those circuits are located in the main engine harness which would be the larger of the 3 plugs on the ficm. you may want to trace that harness back to the pcm looking for chafes or even an unseated ficm connector.
It is really rare for either of these sensors to go bad, and the chance of both of them going bad the same time... about as likely as me building a condo on the moon.
Did the truck have any stalling issues or hard starting issues before this? Usually these codes will get thrown when a truck has stalled or died and a lot of cranking ensues trying to get it going again. My guess is neither of them were ever bad, and were just a side effect of something else.
Are these codes on all the time? What happens if you clear them, do they pop back up instantly, or only when you hit some boost? If it's strictly boost related, I'd pop the EPB tube off, and the sensor, clean both of them really well, and reinstall. I've seen this cause issues like this as well. I recently had the EPB sensor wire harness chaffe on me, it caused issues similar to a sticky turbo, it would take forever to spool, would often fall to 0 psi driving 55mph down the road and I could leave a cloud 3 miles long of black smoke. Taped up the wires and good to go.
Those are output circuit codes. The CMP and CKP signals are provided to the FICM from the PCM for injector timing.
Those circuits are located in the main engine harness which would be the larger of the 3 plugs on the ficm. you may want to trace that harness back to the pcm looking for chafes or even an unseated ficm connector.
It is really rare for either of these sensors to go bad, and the chance of both of them going bad the same time... about as likely as me building a condo on the moon.
Did the truck have any stalling issues or hard starting issues before this? Usually these codes will get thrown when a truck has stalled or died and a lot of cranking ensues trying to get it going again. My guess is neither of them were ever bad, and were just a side effect of something else.
Are these codes on all the time? What happens if you clear them, do they pop back up instantly, or only when you hit some boost? If it's strictly boost related, I'd pop the EPB tube off, and the sensor, clean both of them really well, and reinstall. I've seen this cause issues like this as well. I recently had the EPB sensor wire harness chaffe on me, it caused issues similar to a sticky turbo, it would take forever to spool, would often fall to 0 psi driving 55mph down the road and I could leave a cloud 3 miles long of black smoke. Taped up the wires and good to go.
#25
08-08-2011, 10:20 AM
Check that wiring harness on the FICM going to the PCM. Also pull and clean the EPB tube.
Go here: DTS Articles - Coffee Table Books
2nd row down, 3rd picture over is the "coffee table" for your truck. It's PDF, and I would suggest doing this on a desktop, not your phone. It will show you where all of this stuff is located if you're not familiar with it. It's really handy to have anyways.
Try those simple things first.
Go here: DTS Articles - Coffee Table Books
2nd row down, 3rd picture over is the "coffee table" for your truck. It's PDF, and I would suggest doing this on a desktop, not your phone. It will show you where all of this stuff is located if you're not familiar with it. It's really handy to have anyways.
Try those simple things first.
#27
08-08-2011, 11:45 AM
Did it quite completely or did it switch to defrost... could just be a simple vacuum leak? Does your auto 4x4 work? When you have A/C on, and you turn the 4x4 switch to 4x4 high, does it go to defrost?
#29
08-08-2011, 12:21 PM
Probably completely unrelated. Focus on the cutting out first, and we can worry about the A/C later, since that's not quite as important.
When it's cutting out as boost is coming on, does it still build boost, or just choke out and no boost gets built? Is there any smoke coming from the exhaust when this happens?
When it's cutting out as boost is coming on, does it still build boost, or just choke out and no boost gets built? Is there any smoke coming from the exhaust when this happens?
