i am no mech, but i had the same problem in my 85 westy.......drove me
nuts, and could not find a dam mech that knew what the hell he was doing
to fix the problem.....i finally installed a used computer gizmo, (or is
that the ecu) thats on the left side of the engine compartment, and that
solved the problem........picked one up at a junk yard for
$100........they wanted something like $400 for a new one.......james 89
westy (farf)

Charles McGehee wrote:

> Okay, here's the deal.  I've got a 1985 Westy, automatic.  She's running
> well until yesterday when all of a sudden on the freeway she develops a
> stutter at 2800-3000 rpm (about 45-48 mph in drive).  Below it okay; over
> it okay.  Only does it when engine warm; cold okay.  Starts fine,
> too.  I've got a new AFM, 02 sensor, new-used ECM.
>
> Extra info:  It had been sitting for the winter.  This was the first time
> out.  I put a thing of NAPA injector cleaner in the tank.  After about a
> three-fourths of a tank I stopped for more gas, thought I'd better add
> another can, this time of Gum-Out injector cleaner.  The stuttering
> started
> about fifteen miles down the road after that.  Just chance or
> significant?  Since then I've run most of the gas through, but the
> stuttering continues.
>
> Any thoughts?  Thanks in advance.
>
> Charles
> '85 Westy
>