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Engine miss at very light coasting throttle?
1974 Chev 350, standard points ignition. Heads, intake, and carb replaced recently. Old heads were 1.94 intakes & 76cc chambers. New heads 2.02 with 64cc chambers. Old Comp. ratio --8.5 to 1 Now 9.5 to 1. Stock cam retained. Valves are adjusted properly, motor is timed @ 8*BTDC, dwell@ 29*. Carb is adjusted correctly. No vacuum leaks. Car misses at light throttle coasting down the street at about 30mph. Also misses at higher speeds. It's not a dead miss from one cylinder. What am I overlooking???
3 Answers
- 2 decades agoFavorite Answer
i would think carb problem (off idle circut not functioning right... float setting or plug ports) or worn dist shaft causing points to "float" try to install a direct ignition see if problem goes away....atleast u will eliminate the point thing! try another carb too! even wrong plugs may be cause! stay directed to ign area.
Source(s): <<<licensed mechanic - 1 decade ago
block all wheels and put in drive and adjust the timing. then put in park and set the idle then put in drive then re-check the timing.
Source(s): david_strickland31@yahoo.com
