1997 Chevy S10 OBDII P0300

Question

1997 chevy s10 obd11 po300

Answer 1

P0300 Random misfire

Random misfire are mainly cause by ignition system if there are 2 or more cylinder that are not contributing. What can also cause random misfire are unmetered vacuum leaks that are measured by the MAF (mass airflow) this can be from slightly open EGR valve to to split vacuum hose (especially at the PCV valve).To worn sparkplug wire and sparkplugs.