350 CHEVY MOTOR HAS NO POWER WHEN DRIVING?

[Nick B]

ITS A 1981 CHEVY SILVERADO C10 TIMING IS GOOD PLUG WIRES AND PLUGS ARE GOOD CHECKED 10 TIMES ,,MOTOR STARTS AND IDLES GOOD,BUT WHEN YOU REV UP THE RPMS IT BLOWING WHITE SMOKE NOT ALOT JUST ENOUGH TO NOTICE,WHEN YOU PUT IT IN GEAR,RUNS BAD MAKES THE TRUCK SHAKE FEELS LIKE ITS GOIN TO DIE,,WHEN YOU DRIVE THE TRUCK IT HAS NO POWER CAN HEAR IT SPARK KNOCK /SPIT AND SPUTTERS,,HAD A NEW CRANK PUT IN IT AND ME AND ONE OF MY BUDDYS PUT A NEW CAMSHAFT IN IT,WE PUT A AFTER MARKET INTAKE USED DOESNT LOOKED CRACKED. A SET OF HEADERS AND A NEW CARB ,HELP ME FIGURE OUT WHAT IS WRONG WITH MY JUNK

 

[gdwrnch40]

Check the pickup coil in the base of the distributor.

 

[The best answer is]

Vacuum advance off the distributor that goes to the base of the carb is either cracked or off. Also air cleaner may need changing.?

 

[kelly_f_1999]

exhuast plugged maybe and your typing in caps so stop yelling could be its not getting fuel right