1997 S10 4.3 P0300 random misfire Problem
I have a 1997 S10 with a 4.3 engine. It has a code P0300 random misfire on it. I have change about everything on it and still has the code and misfires and backfires. Spark plugs, timing chain and gear, distributor, ignition module, rotor, egr valve, PCM, MAF sensor and module checked out, Spider injector all changed and still same issue. Ran a compression check and have 150#s on all cylinders. Had catalytic convertor checked and not clogged. Fuel pressure is at 60 PSI. Checked timing out several times and is in time! Help!!