HELP HELP HELP - need advice
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New User
Joined: Nov 2008
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From: Colorado Springs
HELP HELP HELP - need advice
I've got a 2003 7.3L F250, shortly after i bought it, i changed the oil with the Shell RotellaT and started experiencing some running/starting problems. It would start a bit slower and once it got to runnin, it took about 10 minutes of drive time for all of the injectors/pistons to be working properly. It seems to be most effected by cold. when its 80+ degrees outside, this only lasts for a minute or so, but when its cold as hell, it takes almost 25 to warm up. i bought the truck in Simi Valley, CA, so i'm sure the previous owner didnt even noticed. now that the military has moved me to colorado springs, the winters are touhg on it.
i changed to full sythetic rotellaT and that helped a bit, but it still does it. DOES ANYONE have any suggestions as to what it might be? ive already replaced the glow plugs, wiring harness and injector seals and it still does it.
ive heard the injectors are going bad, any thoughts? please email me at ryan.barbour@schriever.af.mil. i would really, really appreciate your suggestions and expert knowledge.
i changed to full sythetic rotellaT and that helped a bit, but it still does it. DOES ANYONE have any suggestions as to what it might be? ive already replaced the glow plugs, wiring harness and injector seals and it still does it.
ive heard the injectors are going bad, any thoughts? please email me at ryan.barbour@schriever.af.mil. i would really, really appreciate your suggestions and expert knowledge.
Elder User
Joined: Jun 2008
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From: Iowa
I'd start with a 203 thermostat....it sounds like the engine is overcooling, as in a thermostat stuck open..... I would tyhink the HPOP would either work or not work, not kinda work,, it may be a fuel pressure thing as well.
Smokin
Joined: Jun 2006
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I have a fully functioning stock thermostat and extra gasket I kept just in case. I can send it to ya and you can switch it out and see if that is your problem.
I also think he has a cold start issue, probably a bad glow plug relay.
I also think he has a cold start issue, probably a bad glow plug relay.
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New User
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From: Colorado Springs
i cant remember the weight offhand, but it was the full sythetic Shell RotellaT that comes in the large blue gallon bottles
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Smokin
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Ryan you said the truck ran great before it got cold?
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From: Colorado Springs
yeah, it seems to run a lot better when its warm/hot out. it starts better, runs 100% a lot quicker, and all 8 pistons/injectors kick in quicker too. it definitely seems to be temerature related. ive taken it to quite a few shops and everyone seems to be saying something different. so i am at a loss...
Smokin
Joined: Jun 2006
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yeah, it seems to run a lot better when its warm/hot out. it starts better, runs 100% a lot quicker, and all 8 pistons/injectors kick in quicker too. it definitely seems to be temerature related. ive taken it to quite a few shops and everyone seems to be saying something different. so i am at a loss...
Did they scan the truck for codes? Do any tests?
Hotshot
Joined: Aug 2006
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Did you say how many miles on it ?..
If it came from california ,,it might have a Glow plug controller ,rather than a Glow plug relay ..
A controller will tell you if there are any problems with the GP's
If it came from california ,,it might have a Glow plug controller ,rather than a Glow plug relay ..
A controller will tell you if there are any problems with the GP's
Hotshot
Joined: Feb 2007
Posts: 10,499
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From: Sterling Heights,Mi
https://www.ford-trucks.com/forums/7...pr-system.html
Reference this thread, do what test you can here, may/should help with the start.
Reference this thread, do what test you can here, may/should help with the start.
Hotshot
Joined: Aug 2006
Posts: 10,764
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THe only thing that comes to mind ,is may be the Engine Oil temp sensor thinks its still in california..
May need to get it scanned to get some live data on EOT & ICP & IPR DC% at cold start ,,
If you do have it scanned ,,may need to go to a dealer ,or a Diesel repair shop ,,for them to have the correct scanner ..
One test you can do yourself , is Unplug the ICP sensor 3 wire plug on the front of the left head ,,start it ,,see if it improves ,,,could be the sensor ,,or the IPR sticking when cold ...
Live data will help alot ...
May need to get it scanned to get some live data on EOT & ICP & IPR DC% at cold start ,,
If you do have it scanned ,,may need to go to a dealer ,or a Diesel repair shop ,,for them to have the correct scanner ..
One test you can do yourself , is Unplug the ICP sensor 3 wire plug on the front of the left head ,,start it ,,see if it improves ,,,could be the sensor ,,or the IPR sticking when cold ...
Live data will help alot ...