[Slade901]

Are you leaking oil or coolant a little bit (around the hoses), etc.

On my 1990 Oldsmobile Cutlass Supreme 3.1L V6, the coolant reservoir is in the middle (top) of the radiator and coolant reservoir cap is not tight and so it leaks the coolant around the cap intead of going to the overflow line from the coolant reservoir itself. The coolant leaks and splatter down below where the Ignition Module/Coil, Crankshaft Position Sensor wire, spark plug wires. It gave me a code 42. I have since fix the leak around the coolant reservoir cap and I don't have any code 42 anymore and the engine does not sputter or die anymore when driving.

Code 43 on the other hand is the knock sensor, if you think the knock sensor is fine, I would trace the knock sensor wire and make sure it is not rubbing on the engine block.

What I have done is purchased a Split Loom Tubing (1/4" diameter x 100-ft) and insulated the crankshaft position sensor wire and knock sensor wire.