Randomly stalls at idle - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 11-13-2013, 06:47 AM Thread Starter
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Randomly stalls at idle

Vehicle is a 1996 F350, 4EOD.

It will start and warm up just fine, but when warm the engine will randomly stall when it is not under load, usually at idle, but sometimes when decelerating. There's no rough idle or other warning -- the engine just dies as if you'd turned off the key. There's no CEL or other warning light. It normally restarts straight away without difficulty although occasionally it will hiccup a little if you try to pull off right after restarting.

I've recently added a DP-Tuner, although this happens in the stock tune as well as Jody's go-faster positions. At the same time I added a 3" downpipe/4" exhaust turboback system -- I have no idea how that might cause this, except that I guess I might have knocked something loose while removing the old downpipe.

I changed the fuel filter recently, so it's probably not that.

It also coincides with a recent cold snap here, so it's not out of the question that it's temperature related.

I did/do have a vac/boost leak, as I managed to knock my boost gauge loose when putting the switcher mount in for the tuner. I'm going to replace the crappy hard plastic line with some proper rubber vacuum hose and see if that helps.

This issue began the day after I added the tuner and the downpipe. However, I took the truck for a couple of shortish test drives immediately post-install and didn't experience any problems other than noticing the boost leak.

I plan to fix the boost leak and unplug the tuner altogether to eliminate that as a source of problems. What else should I be considering and/or testing?
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post #2 of 7 Old 11-13-2013, 03:49 PM Thread Starter
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Not the boost/vac leak -- fixed that, no help.
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post #3 of 7 Old 11-14-2013, 08:18 PM Thread Starter
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And not the DP-Tuner -- removed that, no change. I'm going to change the camshaft position sensor next and see if that helps.
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post #4 of 7 Old 11-19-2013, 06:24 AM
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Go to dealship. Get a cam position sensor.. change it.. takes 15min with a flat head and a 10mm wrench. Its $30 bucks.. theu can cause random stalls or rough idle.. kd try that

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97 f250hd 4x4 7.3l. TW 6 pos, Rosewood Stage 1 Injectors, gauges, DIY intake, 3in dp ti 5in exhaust, D66 turbo.. More to come
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post #5 of 7 Old 11-19-2013, 07:46 AM Thread Starter
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So it proved. New CPS and all is well.
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post #6 of 7 Old 11-19-2013, 07:49 AM
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Glad to hear it man.. id get a extra just to carry w ya.. they have issues and can be fixed quick if your on yhe road. Cheaper then towing it lol

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post #7 of 7 Old 11-19-2013, 07:52 AM Thread Starter
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Quote:
Originally Posted by 97bluepowerstroke View Post
Glad to hear it man.. id get a extra just to carry w ya.. they have issues and can be fixed quick if your on yhe road. Cheaper then towing it lol

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Yeah I think I will do that. A spare sensor is a lot cheaper than a tow. Thanks for the help!
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