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From: kludge@panix.com (Scott Dorsey)
Newsgroups: rec.autos.tech
Subject: Re: 1998 Ford 4.2L V6 idle issue
Date: Thu, 19 Jun 2025 19:13:08 -0400 (EDT)
Organization: Former users of Netcom shell (1989-2000)
Message-ID: <10325i4$47o$1@panix2.panix.com>
References: <d4dfef03090f2ae91c59680f6a20d6e89f623105@i2pn2.org>
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UFO <techforce@nospam.gmx.com> wrote:
>Just got a 1998 Ford F150 with the V6 / Auto about 100K miles. Not sure when 
>its had a tune up, but occasionally at a light the idle will reduce as if 
>its about to stall, then it recovers.

Well, first step is to do a basic tuneup, do a check for vacuum leaks,
clear the codes, drive around and see what codes get set.  With a '98
you get computer control but without so much ability to look inside the
computer control.

But... if you don't know what the plugs are like and you don't know if there
are vacuum leaks and the fuel filter might be the original one that came
with the car, you should at least get the car up to good driving condition
before attempting any diagnosis.

>Some internet research says it could be an EGR valve and other things like 
>the coil pack module?

Maybe a plastic Jesus might help too.  Do actual diagnosis.
--scott
-- 
"C'est un Nagra. C'est suisse, et tres, tres precis."