The Diesel Stop banner
1 - 11 of 11 Posts

·
Registered
Joined
·
1,639 Posts
Discussion Starter · #1 ·
First time it's ever stalled on me while driving (first time for everything). Wouldn't fire after initial cranking, waited several seconds, tried again and it worked and got me home. No codes -- no other warning (that I could tell). Started fine a couple of times after that.

I've had a CPS go out before, but after it was already parked. My current one is under 5 years old, about 65K miles on it. I have 209K on the truck. I don't think I've ever changed the fuel pump, but I do also run an Airdog, which works. I'm having both changed, unless I discover something else in the next day or two.

Ideas?
 

·
Registered
Joined
·
1,842 Posts
Do you have a tach? From what I've read, when it wont start, the non movement of tach, while cranking, is a tell tale sign of bad CPS.
 

·
Registered
Joined
·
1,639 Posts
Discussion Starter · #3 ·
Yes have a tach... but in a bit of a panic at the time, so didn't get to check. I'll remember that for next time (that better not happen), thanks...
 

·
Registered
Joined
·
230 Posts
This may sound crazy but have you added any bluetooth devices or have more than one device on your obdII port? I had my scangauge and a driving monitor from Progressive through an obdII splitter. Van started to randomly cut out on me shortly after startup or sometimes after driving. Changed my CPS....no change. Unplugged the fuel bowl heater...no change. Thought it was my PCM or IDM or dp tuner....they all checked out just fine. Randomly unplugged my scangauge while re-installing my dp tuner and forgot to plug it back in along with the driver monitor and bam....no more issues since. Just a thought.
 

·
Registered
Joined
·
1,639 Posts
Discussion Starter · #5 ·
No, I have nothing that fancy.... It was the CPS more than likely. I had 65K+ on it and have every reason to believe (so far) that was it. My last one lasted around 70K and I changed it before it went out...
 

·
Registered
Joined
·
1,842 Posts
So you already changed CPS? & no recurrences?
 

·
Registered
Joined
·
2,945 Posts
Did you at least buy the International one ?
 

·
Premium Member
Joined
·
7,934 Posts
It's a classic cps failure symptom as well as a failing ipr coil.
I'm a fan a replacing them every 5-6 cheap reliability insurance. Synthetic like Rotella T6 really helps with the hydraulics. It keeps the components like the ipr clean, the engine clean. Hydraulic pumps started having lifespans expand exponentially in the 80s when synthetics went mainstream. That was Royal purple and Mobil ones break out. Other followed then it became mainstream in engines. The valve plate and slippers on Pistons, the tiny passages an the Pistons in he pump stay clean. The electromagnetic coils break down after a while, they fail and work again after they cool.
 

·
Registered
Joined
·
1,639 Posts
Discussion Starter · #9 · (Edited)
It's already changed, no recurrences ... not that I would necessarily have one right away. It's a Motorcraft part, I didn't want to make my shop track down an International since I needed it back sooner than later, and at the time I wasn't 100% sure it was (only) the CPS, and possibly neither were they.

The IPR coil has me curious though.... I have also had symptoms of a "cough" or hesitation during acceleration, usually when cold, almost as if I lose throttle - but it would idle fine. Like I said, this happens occasionally when it's cold, almost at any speed, but my stall happened when it was hot. No one here locally has pinned it on anything, but the IPR was mentioned to me here before...

Oh, and I have historically always used Amsoil, but am currently on Delo as an experiment (have been for a while). Planning to go back to Amsoil in a few hundred miles.
 

·
Registered
Joined
·
1,842 Posts
The shop changed it? Do you know how to change in an emergency, and hope you carry a spare. You only need a 10 mm socket to change, practice during day at home & then you'll be ready, for the worst. Its better to be prepared & never use it, rather than the alternative.
https://youtu.be/wTsoRDZ2axo
 

·
Registered
Joined
·
1,639 Posts
Discussion Starter · #11 ·
I do carry a spare (one of the original ones), and know "how" to change it basically, but never have, and probably couldn't do it physically in an emergency situation, which is why I've had them changed proactively in the past. This time it just caught up to me, with too many things going wrong on this 15 year old rig....
 
1 - 11 of 11 Posts
Top