I don't know for sure, but I doubt that a new harness will solve the problem
since it is just a bunch of wires. The 'fix' had an electronic gizmo that
took care of the problem. Worked for me years ago.
----- Original Message -----
From: "Paolo" <got_art@TELIS.ORG>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Tuesday, January 02, 2001 1:56 AM
Subject: Re: hiccups/hesitations-update-new AFM

> >This has just started happening with my 87 (123,000). In my case, it
> >happens when I'm going peddle-to-the-metal uphill in third
> >(3,500-4,500 rpms) and I shift to fourth. One time it happened in
> >shifting from second to third but in similar circumstances.
> >As soon as I upshift, it feels like the engine cuts out, though the
> >tach shows nothing abnormal. I immediately downshift and everything's
> >fine. It doesn't stall but just _seems_ like it's died. After the
> >third time on three separate trips, I've been taking the hills more
> >slowly and waiting like a gun-shy dog for this hiccup to kick in.
> >
> >Seems more fuel-related than electric. Like Paul, I'd welcome any clues.
> >
> >Nolan
> Jan 2, 2001
> 12:53 AM PST
>
> Nolan,
>
> Yes Nolan it is electric.
> I feel exactly the same as you when it happens. Your symptoms are a ditto
> to mine.
> Something is telling the ECU to cut the voltage to the injectors because
> the air/fuel mixture is off and therefore shuts the gas down. But only
> momentarily -
> Man- alive what a mystery.
> Well I'm gonna change my ignition switch tomorrow- only $16 and it's
> worth it. My tach does move down a bit when it cuts out- so just maybe
> there is a short in the switch.
> I'll tell you what happens.
> Here is a post I just posted to another member.
> Let's share info-- IT IS NOT HAPPENING AS MUCH WITH THE NEW AFM- me
> thinks.
> Cheers,
> Paul
>
> >as I recall the afm has a defect in that it can build up static energy
and
> >the afm design has not changed. the harness was the patch for this
> >problem...... my best guess is to get the harness. once I got mine no
more
> >bucking.
>
> >ed
>
>
> Hey Ed -thanks for the reply
> Bear with me on this. I bought a new AFM and when the van was new it had
> a new AFM.
> I have never had this problem so now after 88k the van is hiccuping and
> bucking, I installed a new AFM as if it was a new van- why should the new
> AFM need the harness fix. Any ideas?
> All ground connections are good, it's never been in salt or snow in fact
> it's never been in weather colder than 30� - so I'm ruling out corrosive
> stuff and cracked and broken wires.
> any ideas,
>