Re: help ford techs ...idles rough ..no miss fire codes
well thanks Jim , year i don't remember , 97-99 , once i find the mp
learn , can it be reset from scan tool ?..or just go and check the ground
strap as you mentioned ... doubt i'll see this van again , he was trying to
sell it ..
Thanks or your advice
"Jim Warman" <email@example.com> wrote in message
> Not knowing the year makes a bit more of a guess. I have seen a couple of
> Windstars that would not set misfire codes because misfire profile wasn't
> learned. You'd have to check the PIDs and see the "MP_LEARN" status. The
> learns the progile of the crankshaft trigger wheel to take into account
> manufacturing variations.
> The two that I saw would not learn this profile. The cure for these was to
> replace the factory ground that runs from the alternator mount to the rad
> support with a continuous wire ground strap - the factory strap has a
> plastic "box" containing what I assume is a capacitor.
> "Chevy" <firstname.lastname@example.org> wrote in message
>> Hi all ...any ford techs out here... i had a windstar in the shop few
>> ago , running on 5 cylinders , no spark on one cylinder (3.8 lite
> engine )..
>> but PC wouldn't set a missfire code , customer said its been like that
>> over 2 months , he fiduard it was do to having over 260,000 miles , but
>> found a bad plug wire on one cylinder ...so my question is why didn't
>> pc pick up the missfire and set a code ? what triggers a missfire code ,
>> thought it was off the crank sensor , seeing RPM decrease ...when it
>> should be an increase .... i know fords are slower at setting missfire
>> than other manufactures but this was 2 months , guy drives alot , other
>> fords with 4.6 and 5.4 with coil on plug pick up missfire faster with
>> minuets long minuets have had them take ove 5 mins to set a code , dodge
>> hate to say is way faster , any ideas ?