JW wrote:
> Hello;
>
> I posted a message a while back about my truck. It has a
> driveability problem that I can't get a handle on. The truck will
> idle roughly and buck and cough on acceleration. Check engine light
> does not come on. Makes it a real pain to drive! Then the problem will
> clear up mysteriously for a short time and then return.
>
> 89 Isuzu Pickup 2WD 5-Speed 2.3L 2bbl. carb 135K miles mech fuel
> pump
>
> rebuilt carb, new dist cap, rotor, plugs, wires, have swapped out
> the ignition coil with no results, tested compression (low), replaced
> timing belt, set ignition timing, checked fuel pressure (little low
> ) 3.5 normal - 3.0 tested
>
> The truck ran fine when I started it today so I took it for a 12
> minute run around the neiborhood. It ran perfectly (good idle and
> smooth acceleration with no bucking) until I got home and then started
> to idle roughly and stall when I stopped in the driveway.
>

Is your driveway steeply sloped? Maybe you've got a carb problem? My
race car had a sticking float from trash in the float bowl that would
cause the carb to literally overflow.

It's also about the only thing on the list you haven't replaced...