7.3 cps constantly failing

jameson731 · Aug 3, 2016

Hey everyone, i have an 01 f250 with the 7.3. I have changed the cps over the last 2 years 5 times. Today being the 5th. When i change it the truck runs great and i have bo problems for about 5-7 months. Then out of nowhere the random stalling, stutter at low rpm, and other common cps symptoms. Ive never had one fail though to the point where the vehicle wont start again. To me it seams crazy that the sensors are failing like clock work every 5-7 months. Ive tried using several different ones and none have had a difference in life span. Ive used ford oem replacement, tried advance auto/autozone ones, and the one i just took out was for the older style powerstrokes that people have been using in the super duties. Is there something else i should be looking into that could be causing them to fail so quickly? Ive searched around but havent found anything with failures like this. Any help is greatly appreciated

Arisley · Aug 3, 2016

Are there any marks on the front face of the CPS when you pull it out. You could have a loose cam gear.

jameson731 · Aug 4, 2016

I will check the one i pulled out today, when i get home tomorrow.

TyCorr · Aug 4, 2016

I personally don't understand how they fail even. Isnt 8t a ***kin magnet and the wires complete the circuit created by the tone gear and magnet?

Justin@DP-Tuner · Aug 4, 2016

Arisley said:
Are there any marks on the front face of the CPS when you pull it out. You could have a loose cam gear.

These are my thoughts as well. Have seen it a handful of times.

I have also seen trucks go through cam sensors for no apparent reason. Just bad luck I guess.

Also check the wiring harness for the cam sensor. Make sure you do not have any breaks or corrosion anywhere. That can cause problems.

79jasper · Aug 4, 2016

Arisley said:
Are there any marks on the front face of the CPS when you pull it out. You could have a loose cam gear.

Didn't Lincolnlocker (jake?) Have that problem?

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mandkole · Aug 4, 2016

yup..

jameson731 · Aug 4, 2016

Got a chance to look at the old sensor. No marking on the outside of it anywhere. I did have a couple small stutters and surges though today with the new cps. They werent nearly as bad as they were with the last cps though. I must have another problem this time. I will have to look into possible icp or ipr.

jameson731 · Aug 4, 2016

I don't have any codes either

Luke@MillerPerformance · Aug 4, 2016

Untape the pigtail right at the connector, the wires get damaged right there for some reason.

Justin@DP-Tuner · Aug 4, 2016

Luke@MillerPerformance said:
Untape the pigtail right at the connector, the wires get damaged right there for some reason.

Yes I have seen this first hand. Caused a whole bunch of run-ability problems.

79jasper · Aug 4, 2016

Justin@DP-Tuner said:
Yes I have seen this first hand. Caused a whole bunch of run-ability problems.

Any chance it could be the fan blowing it back and forth causing a break in the wires?

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TyCorr · Aug 5, 2016

79jasper said:
Any chance it could be the fan blowing it back and forth causing a break in the wires?

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I wouldnt think thats plausible. You have air coming through without the fan. You have more if its on but not where it'd be pulsing in that it could oscillate the pigtail.

But who knows. Id probably just inspect it and possibly repair it.

79jasper · Aug 5, 2016

That's what I was maybe thinking.
But if a person had too much slack in the wire or missing the loom holder on the water pump bolt.
Who knows, just something I was looking at the other day. Lol

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Justin@DP-Tuner · Aug 5, 2016

79jasper said:
Any chance it could be the fan blowing it back and forth causing a break in the wires?

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I don't think that would cause issue, but maybe. Any little tiny fault in the CPS system can cause problems, as many people have found out throughout the years.