changed CPS now stalling

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Jul 10, 2007 | 01:48 PM

rosa70

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Joined: Mar 2004

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From: Florida

changed CPS now stalling

Here is what happened. early 99 model year. Truck wouldnt start this morning so I changed out the CPS. At the same time I noticed the batteries werent turning over the engine as fast as normal so I changed them out under the 3 year free replacement warranty. Before this the truck ran fine just all of sudden wouldnt start. So I changed out the CPS to a brand new Belkin model as that what NAPA had and needed to get it going. Now every once in a while it stalls for no apparent reason. Runs great then stalls. Never did this before. Have you ever seen a brand new CPS do this? Have you ever seen a CPS just stop working after sitting overnight? Could it be a bad connection and should there be any dielectric grease on the fitting? I wiggled the connection after putting it on to make sure it was on all the way. Also prior to changing out the CPS I did a code scan and only got a PO603 code but nothing that dealt with the CPS.

Jul 10, 2007 | 01:57 PM

Joey455

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Joined: Nov 2005

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sorry this is probably a stupid question but my early 99 stalls occasionally so i was wondering what is this CPS your talking about?

Jul 10, 2007 | 02:03 PM

HKusp

Lead Driver

Joined: Jun 2007

Posts: 7,760

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From: Hampton, Maryland.

The CPS is a Cam Position Sensor.

Jul 10, 2007 | 02:10 PM

Texas Outlaw

Not a liberal...

Joined: Jul 2006

Posts: 6,635

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From: Cut & Shoot, Texas

Yes, brand new CPS modules can fail. Not likely but it has happened.

Are all of the wires going into the CPS plug good? Could one of them be bare or broken and causing an intermittent short?

Jul 10, 2007 | 02:16 PM

HKusp

Lead Driver

Joined: Jun 2007

Posts: 7,760

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From: Hampton, Maryland.

Quote:

Originally Posted by Joey455

sorry this is probably a stupid question but my early 99 stalls occasionally so i was wondering what is this CPS your talking about?

Check this out courtesy of Texas Outlaw, who's site is running a little slow today.....

https://www.ford-trucks.com/forums/1...finitions.html

Jul 10, 2007 | 02:44 PM

rosa70

Thread Starter

Senior User

Joined: Mar 2004

Posts: 358

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From: Florida

Im going to check the wiring again. The wierd issue is my brother has a 2001 model and also put the same brand of cam position sensor in it. We were pulling a trailer to Jacksonville a few months ago and few times while driving it just shut off and turned right back on. This was about a week after putting in the same brand of belkin CPS. His hasnt shut of since thatthat I know of. I just hope these belkin CPS's are good. If not Im going to return and get a Ford one.

Jul 10, 2007 | 02:45 PM

clintbonnie

Cargo Master

Joined: Jun 2003

Posts: 3,292

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From: Ardenvoir, Washington

I would make sure you are getting fuel to your fuel bowl.. If that looks OK..last resort, you might try another new grey cps from: http://fordparts.com/cart/?pn=F7TZ-1...&submit=Search for around $25 including shipping..