Clutch in, motor off! - Ford Powerstroke Diesel Forum
 
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post #1 of 10 Old 08-13-2012, 09:14 AM Thread Starter
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Clutch in, motor off!

Firstly, this is my first post on here as I just got my first diesel 2 weeks ago. I'm no stranger to forum boards and the vast info they provide has kept my dailys, hot rods, etc. running for years and this is no different. That being said, here's my problem.

My truck, '2000 F350 7.3 6pd dually, has just developed an issue of shutting off when the clutch is pressed down inbetween shifts. I haven't noticed it being any particular shift or any particular speed as it seems pretty intermittent. I've done some research, both here and elsewhere, suggesting it could be anything from the CPS, to the ICP, to the IPR. Also read it could be the accel. pedal and the idle validation switch.

The truck is basically stock, with a TC Performance programmer on it running the 75 hp setting for fuel economy, and 5 inch exhaust dumping in front of the pass side rear wheels. When this problem occurs the tach just hit's the floor instead of dropping down to idle before coming out of the shift. Once in a great while it has done it without dying, but rpms drop so low the cel comes on along with the wait to start light which goes right back off. The truck always starts right back up immediately with no issues so I'm stumped. Trying to narrow down possibilities before I start replacing everything I can think of....Any ideas?
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post #2 of 10 Old 08-13-2012, 11:14 AM
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the truck shuts off when shifting? Thats crazy.....
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post #3 of 10 Old 08-13-2012, 11:17 AM
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what happens if you put the chip on the stock setting? what if you are not moving and you rev it up and let the RPM's drop back to idle, does it die then?

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post #4 of 10 Old 08-13-2012, 11:27 AM
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does it matter how full your fuel tank is?


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post #5 of 10 Old 08-13-2012, 12:19 PM Thread Starter
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Originally Posted by 85_305 View Post
the truck shuts off when shifting? Thats crazy.....
4000+ posts and that was the best you could do for my first post? Disappointing bud...

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what happens if you put the chip on the stock setting? what if you are not moving and you rev it up and let the RPM's drop back to idle, does it die then?
Actually hadn't thought of doing that but I'll try it and see what happens. If I'm not moving and rev it and let it drop it performs normally.

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does it matter how full your fuel tank is?
Not that I've noticed, no. It started doing it yesterday morning and I was between a 1/4 and a 1/3 of a tank so I brought it up to a little over a half tank but the problem persisted.

I will say that when I drove it this morning I didn't push the clutch to the floor between shifts and the problem never repeated itself. Also took the fuel filter out and drained the bowl awhile ago to eliminate the possibility of water.
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post #6 of 10 Old 08-13-2012, 12:22 PM
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4000+ posts and that was the best you could do for my first post? Disappointing bud...
Somehow I could feel it in my bones you'd have something snide to say.

the truck doesn't know when you push it's clutch in... thats why that is mind boggling to me. There's a neutral safety switch... thats about it.
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post #7 of 10 Old 08-13-2012, 12:28 PM
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Check for loose or low hanging wires or bare wiring behind the clutch pedal. Being you said that it doesnt do it when you don't push the clutch all the way in makes me think that you got a circuit grounding out when pushing the clutch pedal to the floor and it contacting a bare wire causing it to ground out. That's where I would start looking also maybe your neutral safety switch could be going bad.

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post #8 of 10 Old 08-13-2012, 12:34 PM Thread Starter
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Quote:
Originally Posted by 85_305 View Post
Somehow I could feel it in my bones you'd have something snide to say.

the truck doesn't know when you push it's clutch in... thats why that is mind boggling to me. There's a neutral safety switch... thats about it.
I reacted with a 'snide' comment because you initiated with one....no harm no foul....

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Originally Posted by Tuscany View Post
Check for loose or low hanging wires or bare wiring behind the clutch pedal. Being you said that it doesnt do it when you don't push the clutch all the way in makes me think that you got a circuit grounding out when pushing the clutch pedal to the floor and it contacting a bare wire causing it to ground out. That's where I would start looking also maybe your neutral safety switch could be going bad.
Hadn't thought of the NSS but I will definitely look into it. Actually didn't realize it even had one being as this is the first manual I've owned in awhile but makes sense given the symptoms...
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post #9 of 10 Old 08-14-2012, 04:00 AM
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Quote:
Originally Posted by 85_305 View Post
the truck doesn't know when you push it's clutch in... thats why that is mind boggling to me. There's a neutral safety switch... thats about it.
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Originally Posted by Beefcake77 View Post
I reacted with a 'snide' comment because you initiated with one....no harm no foul....



Hadn't thought of the NSS but I will definitely look into it. Actually didn't realize it even had one being as this is the first manual I've owned in awhile but makes sense given the symptoms...
No problem. thats the only possible thing, in my mind, that it could be.
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post #10 of 10 Old 08-14-2012, 09:13 AM
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When you go to start the truck with the clutch pushed in, does the starter seem to bog when cranking, or is it fast and strong as expected? Also, do you feel any vibration through the clutch pedal when you push it?
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