New CPS does not work, help
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Junior User
Joined: Feb 2007
Posts: 81
Likes: 0
From: Eureka, CA
New CPS does not work, help
My truck engine was hiccuping and then acting like nothing was wrong. From this forum I determined that the CPS was going bad. I replaced it today and now the truck wont even start. I bought the part from Autozone (wrong part or defective maybe?) for $150 and it looked the same as the one I removed. What do I do now?
Should I reinstall the old part that I kinda mangled with the channel locks to get it out, or return the new part and try another? Has anyone else had this happen? Thanks for the help, this is a great forum
99 F-350 SD 7.3 diesel 4x4
Should I reinstall the old part that I kinda mangled with the channel locks to get it out, or return the new part and try another? Has anyone else had this happen? Thanks for the help, this is a great forum
99 F-350 SD 7.3 diesel 4x4
Thread Starter
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Junior User
Joined: Feb 2007
Posts: 81
Likes: 0
From: Eureka, CA
Originally Posted by Pocket
It could be that you got a bad cps out of the box.
It could also be that your UVC harness has gone south. It causes some of the same symptoms as a failing CPS.
It could also be that your UVC harness has gone south. It causes some of the same symptoms as a failing CPS.
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
IMO...you may have gotten a DOA part. Take it back...and ask for another. I would do that...before trying to install the old CPS.
Or make certain that you connected the new CPS. Did you hear a nice "clip" for the plug?
biz
Or make certain that you connected the new CPS. Did you hear a nice "clip" for the plug?
biz
Thread Starter
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Junior User
Joined: Feb 2007
Posts: 81
Likes: 0
From: Eureka, CA
It sounded like the plug "clicked" in OK, I even pulled and wiggled on it after the motor wouldnt start. Guess I'll try pulling the plug and reattaching, then returning the part if it wont work right. I suppose thats what I get for going to the cheapo auto parts store. Should have went to Napa
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Junior User
Joined: Feb 2007
Posts: 81
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From: Eureka, CA
What about disconnecting the battery for 10 minutes. Is that supposed to be part of the procedure to reset the computer?
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Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
Originally Posted by Kookadala
What about disconnecting the battery for 10 minutes. Is that supposed to be part of the procedure to reset the computer?
Originally Posted by biz4two
Reset PCM procedure:
Disconnect neg battery
Turn headlights On (removes residual left in system)
Wait about 20-45 minutes (the longer the better)
Turn Off headlight switch
Reconnect neg battery cable
Disconnect neg battery
Turn headlights On (removes residual left in system)
Wait about 20-45 minutes (the longer the better)
Turn Off headlight switch
Reconnect neg battery cable
Good luck...
biz
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Thread Starter
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Junior User
Joined: Feb 2007
Posts: 81
Likes: 0
From: Eureka, CA
OK, I got my money back from Autozone and went to the Ford dealer and bought a new CPS for $190. Put it in and the truck fired right up. The after driving for 1/2 hour on the freeway the engine hiccuped and the SES light came on and stayed on. I figured at least I could get the code read now. Then after stopping and restarting, the SES light was gone. Can a code be read without the service engine soon light being on?
Guess its time to buy a code reader.
Guess its time to buy a code reader.
Posting Guru
Joined: Jan 2007
Posts: 2,364
Likes: 3
From: Gilbert Az.
look real carfully at the cps you got i have actually opened the box from auto zone & found the sensor still in its fomoco bag complete with part number, in other words dont be suprised if there all made by the same vendor & sold to a variety of retailers ford included! check youre harness and plugs, bad sensors act bad all the time!
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
Originally Posted by Kookadala
Guess its time to buy a code reader.
But if you are going to purchase a code reader, I recommend the Equus 3130. The MSRP is $299, but I was able to find it on Amazon for almost half that price. Here is a link...if you would like to research...
http://www.iequus.com/
biz