Truck died now only very rough idle
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Joined: May 2006
Posts: 12
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From: NH
Truck died now only very rough idle
Hi All,
My son borrowed the truck and it died while driving at highway speed. It will crank and restart after a bit but will only barely idle very rough like it is running on 2 or 3 cylinders. lift pump pressure is normal 11 - 12 psi pump cycles normaly. I cracked open a couple of injectors they are spraying fuel but not as much as I remember when I have to bleed the system after a filter change. I also opened the line from the filter to the VP and fuel volume there looks fine. I plugged in a code reader and have the following codes P0252, P0251, and P1688. Any help will be much appriciated.
My son borrowed the truck and it died while driving at highway speed. It will crank and restart after a bit but will only barely idle very rough like it is running on 2 or 3 cylinders. lift pump pressure is normal 11 - 12 psi pump cycles normaly. I cracked open a couple of injectors they are spraying fuel but not as much as I remember when I have to bleed the system after a filter change. I also opened the line from the filter to the VP and fuel volume there looks fine. I plugged in a code reader and have the following codes P0252, P0251, and P1688. Any help will be much appriciated.
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Joined: Jan 2003
Posts: 4,179
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From: The "real" Northern CA
Look hear http://forums.dieselpowermag.com/70/...ing/index.html but I think your VP is failing.
....your VP is definitely done! Had the exact same scenerio!
I wish I was as fine, as those who work the pipeline!
Joined: Dec 2008
Posts: 1,639
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From: Wyoming
Hi All,
My son borrowed the truck and it died while driving at highway speed. It will crank and restart after a bit but will only barely idle very rough like it is running on 2 or 3 cylinders. lift pump pressure is normal 11 - 12 psi pump cycles normaly. I cracked open a couple of injectors they are spraying fuel but not as much as I remember when I have to bleed the system after a filter change. I also opened the line from the filter to the VP and fuel volume there looks fine. I plugged in a code reader and have the following codes P0252, P0251, and P1688. Any help will be much appriciated.
My son borrowed the truck and it died while driving at highway speed. It will crank and restart after a bit but will only barely idle very rough like it is running on 2 or 3 cylinders. lift pump pressure is normal 11 - 12 psi pump cycles normaly. I cracked open a couple of injectors they are spraying fuel but not as much as I remember when I have to bleed the system after a filter change. I also opened the line from the filter to the VP and fuel volume there looks fine. I plugged in a code reader and have the following codes P0252, P0251, and P1688. Any help will be much appriciated.
P0251 Fuel Injection Pump Mechanical Failure Fuel Valve Feedback Circuit
P0252 Injection Pump Fuel Metering Control "A" Range/Performance
P1688 Internal Fuel Injection Pump Controller Failure
Hate to say it but Your VP has failed. Sorry buddy.
Lots of guys suggest these folks for a replacement. This is probably where I will go to get mine. http://www.bluechipdiesel.com/vp44diagnostichelp.html
Thread Starter
Registered User
Joined: May 2006
Posts: 12
Likes: 0
From: NH
Thanks for all the info. I knew that the VP was toast just wanted to confirm that I wasn't missing something that would be less costly? I will most likely go to Blue Chip for the replacment. What do you suggest for a lift pump? The truck is stock and the lift pump that is in now was the direct replacment from Blue Chip it's a couple of years old and seems to be as good as new but I will not take a chance and not replace it with the new VP.
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