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2 Engine Stutters in 1 day! It's a sign of . . . . . ?

2282 Views 17 Replies 10 Participants Last post by  DarthSurplus
The first time the engine stuttered on my 2002 7.3 was this morning on the highway. I eased off of the pedal (my cruise is broken) as I started down a grade. The engine stuttered and then acted as if nothing happened.

The second time it happened was when I was working the throttle and clutch to start from a stop in first gear. It stuttered, I let off, it resumed operation, and I went at it again successfully.

I installed a DP Tuner 6 position chip about 3 weeks ago, and was in the 80 Econo setting at the time. A recent scan has shown that my clutch switch is defective, which is why my cruise control doesn't work.
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When does the under valve cover harness clip thing usually begin to rear its ugly head?

[/ QUOTE ] I am peripherally aware of this issue. What is it, and what are its symptoms?

I've got the spare CPS (hope it's a good'un /ubbthreads/images/graemlins/blush.gif ) and I've got the tools. /ubbthreads/images/graemlins/smirk.gif

What I may not have is sufficient luck to change it out on the side of the highway without getting run over. /ubbthreads/images/graemlins/rolleyes.gif

w w w w were you li li li li li listening to Mel T T T T Tillis on the radio wh wh wh wh when it Hap hap happened?

[/ QUOTE ] M M M Mel was up n n n next, b b b b but the CD sk sk sk sk sk skipped straight from Con con con con con Twitty t t t t t to Mer Mer Mer Mer Mer the Okie from Muskogie!



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Thanks, Ryan!

What a great resource.

It looks like it's fairly easy to check for this problem, and not quite so easy to get to it.

I believe that I performed a buzz test last week with the engine running. While it was doing the self test, it ran the idle up, and back down, and did some things with the injectors that made it run a little rough.

Would this problem, along with my newly-discovered rear main seal leak, be covered by my 5/100k engine warranty? With all of my fuel system mods, to say nothing of the intake and chip?
I changed the TPS 3 or 4 weeks ago.

The engine didn't stutter again for all of Thursday.

It did it once Friday.

I changed the CPS Saturday morning. What little driving I did on Saturday was stu- stu- stu- stutter-free. /ubbthreads/images/graemlins/wink.gif

Also, I noticed that the little dive-and-snort thing it does when I push in the clutch while engine-braking to a stop is much less pronounced. That might have been related to the clutch switch, though.
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I needed a deep-well 10mm socket, a 3" extension, and a long-handled socket wrench. And a screwdriver to get it to begin exiting the hole.
I wouldn't take your truck anywhere near a dealership! /ubbthreads/images/graemlins/wink.gif

I was faced with a similar decision with my Accelerator Pedal Position Sensor failure. I could deal with the logistics and scheduling hassle of taking it in, and pay a $100 deductible, or I could order the part from powerstrokeshop, for about $100, and put it in at my convenience.

If I were you (and I'm glad I'm not /ubbthreads/images/graemlins/tongue.gif ) I'd order two CPS's from powerstroke shop today and install one of them immediately upon receipt. It's far better to install it in a time and place of your choosing, instead of along a busy freeway in the rain at rush hour. /ubbthreads/images/graemlins/blush.gif

It's been four days now, and no more stuttering. I'd say I nailed it, but I would also not like to be premature.
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