livelifewideopen
OBS Enthusiast
1988 chevy k1500 TBI 350. Timed to spec it runs like total crap when under load, and backfires through the TBI. Timed by ear it runs best with advanced timing, but starts hard hot or cold, runs terribly cold, and occasionally backfires though the exhaust when under load. Any ideas? I suspect the distributor because it has un even resistance in it when you spin it by hand. Truck has good fuel pressure at idle, no vacuum leaks and no CEL. Any help is greatly appreciated.