truck quits while driving
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Junior User
Joined: May 2007
Posts: 64
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truck quits while driving
Hi I'm new to this site and have an ongoing problem. I have a f350 late '99 4wd. 7.3. It will quit like you turned the key off if you; hit a small bump on the pass.side tire, shut pass. side door, or turn right. It dosn't happen all the time but, it happens quite often. This can be dangerous because you lose power steering and brakes when it's not running.
When this happens, I have to shift to nuetral, turn the key off, then it restarts right away. I've gotten good at doing this fast but it's really irratating. If you don't turn the key to off pos. first, it will not restart.This has been going on for a couple of years and we can't figure out what the problem is.
Have replaced the CPS a couple of years ago and that didn't stop it. Awhile back we went trough the wiring harness to look for bad conections or chaffed wires. Didn't find any problems but, the truck did not quit for almost a year after that! So we might have hit the problem without knowing it. If someone could solve this for me, it would be greatly appreciated. Thanks in advance Dave B.
When this happens, I have to shift to nuetral, turn the key off, then it restarts right away. I've gotten good at doing this fast but it's really irratating. If you don't turn the key to off pos. first, it will not restart.This has been going on for a couple of years and we can't figure out what the problem is.
Have replaced the CPS a couple of years ago and that didn't stop it. Awhile back we went trough the wiring harness to look for bad conections or chaffed wires. Didn't find any problems but, the truck did not quit for almost a year after that! So we might have hit the problem without knowing it. If someone could solve this for me, it would be greatly appreciated. Thanks in advance Dave B.
Logistics Pro
Joined: Mar 2004
Posts: 4,221
Likes: 3
Welcome to FTE, Dave! 
The CPS can go out over and over again. Some guys have gone through three or more. I'd replace the CPS again if it's been a couple years. The way it is dying on you sounds an awful lot like a CPS issue.
The CPS can go out over and over again. Some guys have gone through three or more. I'd replace the CPS again if it's been a couple years. The way it is dying on you sounds an awful lot like a CPS issue.
Elder User
Joined: Sep 2006
Posts: 627
Likes: 0
From: Middleton, Idaho
When you replaced your cps what type did replace it with? several members have had to replace the replacement part with an oem. Ford is now selling the cps as of today for 25.00 part # f7tz12ko73b. Might be worth replacing and seeing if that helps.
Jeff
Jeff
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
Have you checked for any faults codes? Did you fixed the badly designed 9 pin UVC connectors?? If not, they will separate and become loose. I fixed mine a couple of months ago with a homemade shim under the plastic locking tabs.. The following website the cps is $15.23 + shipping.. I read they are out of stock already.. looks like everyone is buying the new cps... anyway see:
http://fordparts.com/cart/?pn=F7TZ-1...&submit=Search
http://fordparts.com/cart/?pn=F7TZ-1...&submit=Search
Last edited by clintbonnie; May 1, 2007 at 05:53 PM.
Fleet Mechanic
Joined: Feb 2005
Posts: 1,797
Likes: 1
From: Northern Colorado
Originally Posted by F350long
.........Awhile back we went trough the wiring harness to look for bad conections or chaffed wires. Didn't find any problems but, the truck did not quit for almost a year after that! ......
