[OJ1988]

Previous owner complained of idle issue after driving a distance.

First thing I found, pcv port on tb was plugged with carbon.
Removed throttle body, used a few cans of cleaner on it, reinstalled with new gasket. Old pcv valve stuck replaced with new.

I then ran some seafoam through the engine.
Replaced spark plugs with new ac delco units. Old ones were pretty bad. Replaced cap and rotor with new, ok'd ones pretty worn.

Scanned ECM, code 44, replaced original O2 sensor with new unit, cleared code.

Drove around block, idle stayed high. PO reported low rough idle.
Checked idle air control valve. It was not functioning. Replaced with new unit.

After breif test it seems much better, idles lower, smooth. Can't say perfect, but it's much better.

Changed oil and filter. Truck has great oil pressure, over 40 at idle when warm.