Yeah I went to my dealer and asked for an "IPR for a 7.3L"

"No IPR. You must mean FICM."

Nooo.. I meant IPR. There is no FICM on a 7.3.

He proceeded to try to convince me that I was wrong and that clearly I needed a very expensive FICM.

 

keep us informed on your progress.

Don't worry about injector #8. too much info from the 'shop' that is not causing your shut down problem. The 'shop' seems to want to show you that 'they' found 'something', when 'they' did not.

If the connections are not good at the CPS the truck will shut down and not start . Water in the CPS connections will also cause a shut down. People will change out the CPS time after time when it is not the CPS it's self, but electrical wiring/connections or sealing that are around it.

The 7.3 is a very good truck and sometimes a 'bug' will show up. The up side of this is that when 'we' do fine the bug 'you' will know 1,000% more about your truck that when you first started. A little maintenance and you should look to get 500,000 miles out of your truck. Getting that many miles should show you that it is more on the road than in the 'shop' or 'truckers' would have discarded the 7.3 a long time ago. Keep the faith and 'we' will find the problem.

 

Got a call today from the shop that I could come pick up the truck. I talked to the diesel mechanic and he said that they haven't been able to get the truck to die since replacing the CPS. Looking at the odometer, they seem to have put 30 miles on the truck since having it this last round. So, they've replaced the ICP, the CPS, and the back pressure sensor. Is it possible that I got 2 crappy CPS's? The first one (black fat one) was an older unit that sat in my friends tool box for a few years. The second one (grey skinny one) was bought from the Ford dealership. He says the one they put in is a fat grey one. He tested the electrical side of the IPR and states it "has 10.8 ohms, new has 12.6 ohms. Amperage pattern shows nothing out of the ordinary.Power wire capable of powering a headlight." But, he also states "If problem persists, recommend replace the IPR." They told me they didn't want to replace the part since it hadn't died on them. Saves me money, I suppose, but it could still be the mechanical part of the unit.

I'm still not real confident in the truck yet, although it does run much quieter and seems to run just fine. My son in law has loaned me his car and I think I'll drive that to work for the week (don't feel like sitting on the side of the freeway at 5:15 in the morning). I'm thinking I'll order the IPR from Riffraff tonight or tomorrow and take the truck for a drive on Saturday. If it dies, I'll swap out the IPR myself. I think I've done enough reading that I can get it done. I may just switch it out for my peace of mind. Besides, I don't like my truck sitting anywhere else besides my driveway.

On a side note - while looking at IPR removal videos/web pages, I came across A/Ox4's channel. Lots of good videos you got posted, Trey! I'll be checking them all out soon enough.

 

If you end up replacing that IPR, be sure to save the old one and re-build it for a spare, as there's virtually no hard parts inside that go wrong.

Guzzle sells an O-ring kit to do that very thing!
Injection Pressure Regulator Repair Kit

The coil has been known to get intermittent, however, and could be a difficult problem to pin down.

Pop

 

Will do, Pop. It'll make a good learning session if nothing else. Just ordered the new part. I have a gut feeling it's going to boil down to that, too. I just can't see the CPS being the only issue I was having with it dying. Especially, having thrown 2 new ones in already. If I'm wrong, I'm that much closer to a brand new engine!

 

What a coincidence. I just sent you a PM
Thanks for the compliment!

 

I believe Greg, FTE's "shake n bake", fought an intermittent IPR coil a couple of months ago. You might want to contact him about what his initial symptoms were, and compare notes.

Just a thought.....

Pop

 

Mine was intermittent as well. We had it on an AE and all measurements were well within spec for the duration of the test.

 

Bam!



I'm on it on Saturday! Eh, maybe tomorrow...

Thanks, Clay!

 

Here's hoping for success with finality!

Pop

 

When I did mine I was in a time crunch. I fronted $319 to the dealer for mine, then bought another one from Riffraff and returned that one to the dealer a week later when I got back from my 3 days at work. My plan worked great

 

Nice, did you get the correct tool to pull it out? I think its a 28 mm deep well socket or you could go to lowes and buy a plumbers shower faucet removal tool kit for cheap.

 

I recall using a 1 1/8" very deep socket... and I think it's a 29, but going from standard to metric could make it a 28.

 

Thanks, Pop. I hope.
I like your plan, Trey. Very nice! $319? Well, it's not the worse I've seen. I was looking at one for $509.
Tugly is correct, Rob. It's a 29mm. I grabbed an axle socket from O'Reilly's - fits perfectly. Now, my quandry (as small as it may be) is I'd like to drive it around until it does die just to prove to myself that the shop didn't fix it. Or i could just replace it and say to heck with it. Decisions, decisions...

Well, I could drive it around til it dies and then just swap out the IPR coil to narrow things down. And then swap the rest of it when I get home. Hmmm...

 

So, I drove the truck untouched all over the neighborhood today for about 30 miles with no failures. I thought I felt a little warble one time but that was it. It ran fine, otherwise. It was mixed driving of normal 25 MPH residential and longer get-up-some-speed streets. Nothing except that one little thing as I was coming up to a stop sign. I think I'm going to let it cool down and swap out the IPR anyways. I just can't see that the things the shop replaced (ICP, EBP sensor, and CPS) were the cause of the stalling. My luck - if I had driven 31 miles, it would have died...

Edited: I figured I would take some resistance measurements before it cooled off to much. New IPR coil reads 10.6 ohms cool, the old IPR coil reads 29.6-29.8 ohms hot. And it is hot in there!