Need help using AutoEginuity to track down rough running Excursion v10. Misfire quest - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 02-16-2014, 02:59 PM Thread Starter
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Need help using AutoEginuity to track down rough running Excursion v10. Misfire quest

Hey all,

2000 Ford Excursion v10. 156k on it. Don't have an idea on the previous maintenance history.

Bought it about 2 weeks ago and it ran flawless on a 2 hour drive home.

Recently I have been noticing a rough idle. Tach bounces slightly and I can feel it vibrate the Ex.
It also started running very rough while driving the last couple days. Feel like it is misfiring severly and vibrates the entire vehicle while driving. I can hear it running rough also, seems like there is more chatter from the engine.

What is weird though is that it does not always do it. Yesterday it ran perfect, smooth and quiet. Driving it today to church also had no issues until coming back home. Started it up and it was idling rough, driving home it ran worse than ever. I even thought I could smell a slight burning smell coming from the vehicle (most likely from the rough idle causing it to not burn as clean).

Long story short. I have the 2013 version of Auto Enginuity. Should be updated with a pretty currrent version. I have the enhanced Ford bundle also (thanks to dealing with 6.0s).
I cannot seem to find a cylinder contribution test though. I thought I would be able to use AE to track down a cylinder(s) that is not preforming correctly.

Any ideas on how to run that test or any test that will help me track down the issue. Would like not not start throwing parts at the truck.


2003 Ford F250 6.0 powerstroke 4x4.
ZF6 manual trans, ext cab short bed
deleted, 4 inch exhaust, gauges, traction bars
16x10 Weld wheels wrapped in 33s

Early 1999 Ford F250 7.3 Powerstroke 4x4
Crew cab short bed
straight pipe, intake
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post #2 of 3 Old 02-23-2014, 03:25 AM
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Sounds like coil pack issues to me. but i'm not familiar with the auto enginuity tool that you have so i'm no help there.

03 F250 XLT
182,000 and still goin strong
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post #3 of 3 Old 02-23-2014, 04:57 PM
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Not familiar with that equipment either but a new set of coil packs and plugs would be a good start. Coils are cheap online, less than $100 for set of 10, and autolite double plat about $3.50 ea at advance.

I replaced all mine due to similar issues and also after having a plug pop out on me driving down the road.

Mis firing issues are now gone. 2 or 3 of my plugs were rusted. Water seeped down into the back cylinder's plug sockets
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