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So... I finally got my Exy where I want it (drive-train wise), and out of the blue, she starts randomly dying and giving me some 'hiccups' from time to time. The time frame is variable. It can get so bad its almost undrivable, then 10 minutes later, stop acting up and run like a champ for an hour or even a day.

I have been going thru the possible causes one at a time, starting with the low-hanging fruit, a new fuel filter. With no change in the issue, I next checked out the ICP sensor. Sure enough, there was oil in the plug. Changed it and it 'seemed' better at first, but maybe not. At any rate, it still hiccups badly sometime. At low speed, I seem to see a puff of white smoke out the exhause that sometimes accompanies the hiccup. Gotta be honest, I'm sure this is playing hell with my u-joints and pinion gear.

I don't have a clue what CPS is in the truck. I have a new purple one on the way. We have a big camping trip coming up (leaving next Saturday) , so I order a new IPR valve to boot. All sensors are genuine Ford. I have learned that aftermarket sometimes is junk when it comes to sensors. I went through the wiring harness with a fine-toothed comb. If there is a problem there, I could not find it.

My gut says IPR valve, with a strong 'maybe' on the CPS. I don't have access to any code reader except a $60 basic one. I have yet to scan codes, but my CEL has been on for a couple years now due to the chip.

I'm running outta time to work on this thing before our trip. Anybody got any ideas on other rocks I can look under?

Thanks!

Tim
 

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What chip do you have? You might start by pulling it out and see if the problem is still there. If you could watch ipr duty cycle and icp pressure wile you have the problem that could help to point you in the right direction.


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I was afraid to remove chip with Single Shot injectors. I have a DPTuner chip (F5?)

Tim
 

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Check the Tin nut on the IPR. You might need a new IPR. A Scangauge II would be a worthwhile investment to help you see the ICP and IPR values when the problems happen. Did you cut the wiring back a ways when you relaced the ICP pigtail making sure to get back to good wiring?
 

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New to these trucks but had a bad cps that came from the Ford parts counter questioned my research but warrantied it and all was good afterwords also mimicked my bad tps might sound stupid but they were very similar how it would die but always restart
 

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When is your new cps due to arrive? That is the first thing that I would try.
 

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New CPS (and IPR) are both in-hand. I got sidelined with a case of Vertigo on Monday, so I have not had a chance to install anything yet. I'm feeling better today, so I'll put in the new CPS tonight and take if for a test drive. If all is good, I'll leave the IPR in the glove-box till I get back from my trip. If that don't cure it, I'll let it cool down and put the IPR in on Friday morning.

Tim
 

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New CPS (and IPR) are both in-hand. I got sidelined with a case of Vertigo on Monday, so I have not had a chance to install anything yet. I'm feeling better today, so I'll put in the new CPS tonight and take if for a test drive. If all is good, I'll leave the IPR in the glove-box till I get back from my trip. If that don't cure it, I'll let it cool down and put the IPR in on Friday morning.

Tim



Please post your results, nothing worse than following a forum post and never getting an answer to problem.
 

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Please post your results, nothing worse than following a forum post and never getting an answer to problem.
Of course! Looks like CPS was it. It appears it was the original black one. I guess 16 years aint a bad run, eh?

New CPS installed, she fired right up, ran a 20 mile loop to a buddys house and back. Never missed a lick.

Thanks for the help guys!
Tim
 

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Thanks for the update. You said earlier that you had ordered the purple one. Could you post the part number of the one you put in and where you ordered it from?

Did you qualify for a new one via the recall back in 2008-9 time frame when Ford was forced to address this matter?

Let us know if the new CPS helps your mpg.

Does anybody know: Can they make a CPS so they just don't fail?
 

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Thanks for the update. You said earlier that you had ordered the purple one. Could you post the part number of the one you put in and where you ordered it from?

Did you qualify for a new one via the recall back in 2008-9 time frame when Ford was forced to address this matter?

Let us know if the new CPS helps your mpg.

Does anybody know: Can they make a CPS so they just don't fail?
16 Years is about as close to forever as one can hope for and this failure had nothing to do with the reason for the recall.

The Black was the BEST and offered the very smoothest out-of-the-box performance of any CPS model ever made.

You can still find them “New Old Stock” (NOS) on EBay for $80-$100 new in plastic package. Thats a darn good price for possibly the best single part to improve performance.

The Blue/Purple is supposed to be the next closest Motorcraft and the Grey is a distant third.

Your Ford Parts Counter is going to tell you that the Grey one is for your ‘97-‘03 7.3 but the Purple is better and for pre-‘97.5’ish.

I have 5 spare Black CPS to split between 2 trucks. If mine last even 10 years each then they are going to outlive me.
 

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That F7TZ-12K073-A is the one that just failed on me at about 13 years.

Just wondering though: what was the issue with the recall if not that they were dying too soon and why is the new one used after the recall if it is not better than the black one?
 

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That F7TZ-12K073-A is the one that just failed on me at about 13 years.

Just wondering though: what was the issue with the recall if not that they were dying too soon and why is the new one used after the recall if it is not better than the black one?
Exactly, a few had apparently died too soon, potentially stalling the truck in traffic.

Any CPS that lasts more than 10 years has not died too soon.

It has lived a long & prosperous life.

All electrical sensors eventually fail and many of those failures occur while the vehicle is in operation, i.e. “in traffic”.

As for “Better”...there are various definitions.

Ford considers “Better” to mean one that results in fewer lawsuits at the cost of performance.

Many 7.3 owners consider “Better” to mean a CPS that makes their engine run smoothly, quietly, and with better fuel economy and performance (based on all of the various forum threads on the topic) even if it has a slightly higher risk of failure.
 

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Thanks ArcticDriver.

So from what you said before, is it true that the black one (F7TZ-12K073-A) gives the better performance but is no longer manufactured and sold by Ford, that the Grey one is the one they replaced it with, and the blue/purple one is better than the grey one but Ford won't say it it approved in the 2000 7.3 truck? If I got that right, what are the characteristics of the grey one that makes it worse than the black one? Is it the grey one that lasts longer?
 

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You summed it up well.
I don’t know which one lasts longer. These recent posts indicate Black CPS lasting in excess of 10 years...I don’t know how anyone can have greater expectations than that?

People choose the Black for performance. Changing a CPS requires a 10-mm wrench and a skinny forearm and 15 minutes.

When using the gray, I had issues with #8 (and I think #3) when scanning PERDELS with my AuroEnginuity and just an overall noisier engine.

For an extra $30 over Ford Parts counter, you can get a NOS Black CPS off EBay and see for yourself.i sent you the link. The plastic packaging appears crisp so that CPS has not been boucing around in a glove box for 12 years...its been sitting on a shelf.
 

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My first CPS that came with the truck got replaced under the 100k warranty after about 5 years of use, so I got hit with their $100 deductible. I know the one they put in was black. But I don't know the color of the one they took out. It would have been whatever came with the truck. After that initial failure, I got an extra black one and that is the one that lasted about 13 years. I am now running on the black one that was put in under warranty and which was only used for about 1 year. If they fail based on age and not on usage, I possibly am vulnerable. I hope not, but I fear that these magnets they use just deteriorate with age, in which case mine might fail pretty soon with very little use because it was manufactured over 14 years ago. If anybody has any idea about that, please post.
 

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Yes, CPS eventually fail.
Thats why it is common practice to carry a spare in the glove box.

The magnet in the Black CPS has been tested by multiple forum members and the plastic casings have been cut apart and compared. The Black CPS has the largest and strongest magnet based on those observations.

I guess I don’t understand your continued concern. A CPS, like all electrical sensors eventually fail and require replacement.

Good luck in your quest.
 

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