93 CHEVY 4X4 350 - RUNS FINE EXCEPT WHEN IDLING IN GEAR FOR AT LEAST 15 SECONDS IT STARTS TO HAVE AN INTERMITTENT MISSFIRE. ONE HICCUP, THEN FINE FOR A FEW SECONDS, THEN MAYBE TWO. ITS NOT A BIG PROBLEM BUT IRRETATING WHEN SITTING AT A LONG STOPLIGHT. PROBLEM STARTED WHEN NEW MOTOR WAS INSTALLED, ALL NEW PLUGS AND WIRES, CAP AND ROTOR, DISTRIBUTOR. I SWAPPED ALL PARTS BACK OUT AND STILL DOES IT.

SOURCE: 96 s10 misfire, has new plugs, new distributor

Check the injectors. They are really bad about leaking on the 4.3's.

Ned C Cook

• 3433 Answers
• Posted on May 10, 2009

SOURCE: Glowing exhaust manifold on passenger side

was this a direct rplace engine? why , how and when is this "glowing determined? Need to know.

SOURCE: 94 chevy k1500 5.7L engine won't run properly.

It could and most likely is a faulty Fuel pump.

SOURCE: code 43 . my alt stayes at about 11 12 volts when

CODE 43 IS ELECTRONIC SPARK CONTROL -.KNOCK SENSOR.LOOKS LIKE ALTERNATOR NOT PUTTING OUT ENOUGH VOLTS TO CHARGE BATTERY.YOU NEED 13.5 TO 14.5 VOLTS.CHECK ALTERNATOR FUSE AND ELECTRICAL WIRES.MAKE SURE BELTS NOT SLIPPING.IF ALL IS GOOD.REMOVE ALTERNATOR.LET AUTO ZONE CHECK IT.TO MAKE SURE.TURN OFF RADIO BEFORE MOVING BATTERY CABLES.SO YOU WONT LOSE RADIO CODE.YOUR CAR IS NOT GOING TO RUN RIGHT IF THE ECM DONT RECEIVE 12 VOLTS OR 13 VOLTS.

SOURCE: Shakes while idling and sometimes stalls.

check for minor vacuum leak and map sensor,pcv,egr valve