99F-250 Powerstroke help!
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4wd Low
Joined: Mar 2007
Posts: 10
Likes: 0
99F-250 Powerstroke help!
I have a 99 F250 that has been bullitproof until last week.
Going to work it felt like it was hesitating, but so violently I thought someone had a chain hooked to my trailer-hitch. The check engine light would come on and the truck would die. Pulled over cut the key off then on again, and the light went out and fine for a day or so. I have an Evolution programmer and the codes I have seen are: P1670 E F Feedback not detected, P 0344 CPS circuit error, P 0340 CPS circuit malfunction, P 0470 Ex back pressure circuit malfunction and P 0478 Ex pressure control valve high output. I replaced the CPS (from Autozone) and when I turned the key on I got an error: K A M Keep Alive memory, but the trruck drove great. Next day we are back to the same old story and the truck will go 4 miles and start missing again and die. Then will start up and run fine.
The ford dealer said I need a new ignition.
Any help from you Pro's would be awesome.
David
Going to work it felt like it was hesitating, but so violently I thought someone had a chain hooked to my trailer-hitch. The check engine light would come on and the truck would die. Pulled over cut the key off then on again, and the light went out and fine for a day or so. I have an Evolution programmer and the codes I have seen are: P1670 E F Feedback not detected, P 0344 CPS circuit error, P 0340 CPS circuit malfunction, P 0470 Ex back pressure circuit malfunction and P 0478 Ex pressure control valve high output. I replaced the CPS (from Autozone) and when I turned the key on I got an error: K A M Keep Alive memory, but the trruck drove great. Next day we are back to the same old story and the truck will go 4 miles and start missing again and die. Then will start up and run fine.
The ford dealer said I need a new ignition.
Any help from you Pro's would be awesome.
David
More Turbo
Joined: May 2005
Posts: 704
Likes: 2
From: Thousand Oaks, CA
sounds like you need a new CPS (cam position sensor). those are classic indications. hopefully a moderator will come along and move this to the 7.3 forum.
EDIT: sorry david i just realized you already changed the CPS. woops!!
EDIT: sorry david i just realized you already changed the CPS. woops!!
More Turbo
Joined: May 2005
Posts: 704
Likes: 2
From: Thousand Oaks, CA
Sorry David, i dont know what my deal is tonight. what did the dealer mean by a new ignition??? that was all they told you??
do you think it is possible you got a bad batch of diesel?? maybe water in it??
do you think it is possible you got a bad batch of diesel?? maybe water in it??
New User
Joined: Mar 2007
Posts: 1
Likes: 0
i know u replaced the cps but never buy electrical parts from advance or auto zone go to ford yes its expensive but they will work, thats exactly what it sounds like as soon as the truck heats up and heats the sensor it stops running just dies, then leave it sit and cool down will start right up and run perfect till the sensor gets real hot again!!
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