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2002 f350 AT, 315000 miles DRW 2WD
Assisting a friend with drivability issue.
truck runs out 100% then with no rhyme or reason runs like its on 4 cylinders lack of power and eventually dies
cold warm no difference
What we have checked
Fuel pressure 55 psi (swapped with a known good off my truck with no difference)
new filter no change
same if tank is full or below 1/4
Code for low boost pressure P1247
42 pin connectors / wiring checked for chafing
Connection / nut on IPR clean not oily
chip removed / reset to stock no difference (edge evolution)
Attached file is rough idle to stall after a 2 hour trip with no issues
P1247 can point to the MAP sensor. Its reading a normal 14.6-14.7 at idle though in this data. Check the hose to the MAP sensor for cracks/leaks. I would be good to get some normal driving data and WOT data to see how boost looks.
ICP looks well behaved, following IPR%, but RPM fails to respond.
Might have 2 different problems here, one for boost and one for the idle/stall.
With 55psi fuel pressure, I'd look at oil side and electrical side issues.
Is the oil level full?
Have the UVCH been checked - 50cent mod done?
Are the ICP and IPR original or replaced motorcraft brand?
You could try running with the ICP sensor unplugged on the next trip or two and see if the stall repeats. If it does not, suspect the ICP. If it does, suspect the IPR needs a rebuild or replacement.
That boost code might be due to a significant boost leak - though I'd think you'd see alot of black smoke when you get on it. Boost leak check of the intake side and soot check on the up pipes would be helpful.
Thank you for reviewing my data stream. will look into the recommended path to check. Injector cups were done about 6 months ago by a well respected local shop and UCVH were replaced at that time. What is so frustrating is the total randomness with no AH HA that's what makes it happen flags.
Oil level was first thing I had him check
Last edited by BCMO; Apr 23, 2021 at 02:03 PM.
Reason: check oil
I agree, these random failures are difficult to pinpoint.
Is the rig hard to restart once it dies, or does it start right up?
Good work using FORScan on this issue. You can change PID EOTV to EOT to get good engine oil temp data. Also can drop RPM.OBDII and just use RPM - that one is working fine.
Sometimes starts right back up other times
The PID tool is great many thanks to all for the work put into it, sure can relay a lot of info that cant easily put into words.
Unplugged ICP sensor idle smoothed out after a few minutes, connection was oil soaked.
Both ICP and IPR seem to have been replaced and new pigtails at some time prior. Unknown if Motorcraft will investigate further
Based on the chart, the FUEL PW and MFDES look erratic to me. This may be in an effort to stabilize the idle if the ICP is providing erroneous parameters to the PCM.
As for the MAP sensor, when you are checking the hose, make sure it has a gentle slope from the sensor to the port on the spider. There should be no rise or dip in the hose.
Quick update, ran truck without ICP connected, ran mildly better however still went into rough running ( it is still very random ). Replaced ICP as the old was seeping oil, still random rough lack of power. Working on getting logs via forscan. MAP hose was checked with no cracks noted. Inspect IPR next plan of action. will keep updated when available. Up pipes are leaking however that is a different issue to be addressed.
Mike, some FORScan logs would certainly help us help you.
Some key PID's you will want to log data for are below:
Also, please ensure your units of measurement are set correctly for PSI, Fahrenheit, etc... We can translate them later if needed, but it is sooooooo much easier if they are set correctly from the get go.
I am not sure how adept you are with FORScan, so here is a link to a Q&A created by FTE'r BWST a while back.
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.
will investigate further
