I need help
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Joined: Feb 2022
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I need help
My truck has been having a long crank over and smokes cold or warm. Feels like I have loss of power. Every once in awhile it will blow white/blue smoke but then goes away instantly. When I get on the highway seems like it loses power and just blowing smoke until I let off the gas then goes away. Will die at idle a few times before it stays going. I checked fuel bowl everything looked good. Will cut in and out until fully warm. It will stall a lot unless it’s plugged in if it sits till it’s cool.
Hotshot
Joined: Mar 2014
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From: Douglassville, PA
More info on the truck would be helpful. Like mileage, how well it's been maintained. Do you have a code reader for it? TorquePro or ForScan are cheap and effective with ForScan being better for diagnostics.
Hotshot
Joined: Mar 2014
Posts: 10,750
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From: Douglassville, PA
278 could be injectors going bad. Intermittent problems are usually loose electrical connections or wires chafed on the harness on the driver's side where it rides up over the valve cover. Also check for tinnerman nut on the back of the IPR. Make sure it's there and tight. After all that, get some numbers on your IPR and ICP when running.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
First thing that comes to mind for me is a failed o-ring on one or more of the fuel injectors for the HPOP galley. Long crank times indicate it takes a while for the HPOP pressure to build enough to be able to drive the injectors.
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From: Muskogee, Ok
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Tuned
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From: Lake Oconee Putnam Co. Ga
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Laughing Gas
Joined: Oct 2008
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From: Kansas City KS
I think id monitor icp. Like everyone has suggested. Your icp sensor could be false high (mine just did this). Monitoring icp and ipr i could see icp seemed unusually high even though i was just cruising or light throttle. And ipr wasnt maxed out. That told me it was seeing enough icp so no more was commanded. But i knew from seat of pants when i stepped on it esp on a hill it would sorta give up. So i unplugged icp and its a different truck or van in this case. So i ordered a icp.
Lucky for you your rig isnt a van and you can get to all of this almost flat footed with the hood up. No so much on the van. Takes some houdini strech arm strong to get to anything.
Your hard starts could be related to this. Or could be glow plug solenoid. In 5 minutes you can diagnose this and icp sensor. Disconnect icp sensor, and jump your gpr. If it fires off easier and less smoke you are onto something.
Lucky for you your rig isnt a van and you can get to all of this almost flat footed with the hood up. No so much on the van. Takes some houdini strech arm strong to get to anything.
Your hard starts could be related to this. Or could be glow plug solenoid. In 5 minutes you can diagnose this and icp sensor. Disconnect icp sensor, and jump your gpr. If it fires off easier and less smoke you are onto something.
FTE Leadership Emeritus
Joined: May 2014
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From: Lake Hartwell, GA
In addition, if you are looking to shim the injectors as a bandaid, that is fairly cheap.
Due to the cost and work involved, injectors should be positively identified as the cause, not a suspect.
That us my opinion anyway.
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