VSS buffer makes sense, especially since the speedometer is different than it would be in an S-10 and the VSS output might be different than the ECM expects.

Or, it could be the Flux Capacitor.


2000 Mitsubishi Montero Endeavor, "Katsumi", 138k
1993 Toyota Tercel, backup vehicle, 93k
1989 Isuzu Trooper, "Beniko", R.I.P. at 233k

My 'Genuine Isuzu Parts' decals - for sale