About 50% of the time, when I shut off the engine on my 82 S10 2.8 L V6, it backfires. I replaced the check valves in the smog part of the engine, no change.
So, what to try next? Catalytic converter, smog pump, or that complicated and expensive electric valve next to the carb, on the passenger side?
Lee K. Gleason N5ZMR Control-G Consultants snipped-for-privacy@houston.rr.com