1999 Chevrolet Silverado 1500 "99 vortec misfire" Questions

...Vortec. our van did this also. only when it rains. we did 2 things to cure it. 1 expensive but huge difference. use GM oem cap, rotor, ignition module. 2 make sure your windsheild seal is watertight. ...

...99 CHEV SILVARADO 4.3 I had a 96 tahoe 5.7 that gave me hell with the Distributor sparking to the wrong terminal. These Vortec engines use computer controlled timing, but still use a rotating ...

...Vortec V8Check your FUEL INJECTOR HOUSING. The old style factory housing most likely has an internal crack. OLD style has the INJECTORS AT THE HOUSING with tubes running fuel to the engine. NEW ...

...99 Chevy Suburban 1500 it is giving me a random multiple misfire code however it seems to be running nice and smooth I've changed the cap the rotor button the plugs the wires I don't know what is ...

...vortec v6 chevy pickup 2wd. (C) gen4 truck, pick up not the Suburban C1500
no engine told and is engine question , no VIN told (has engine code)
4 engine , 3 gas, 1 diesel. gas 4.3,5.0-and 5.7 ...

...Vortec engine suddenly start backfiring? It was running fine, then almost home from work it started backfiring. Doesn't matter if you let up on the gas peddle or give it more gas, even parked it ...

Vortec engines that will cause the engine to load up and run rich.  Sometimes it is bad enough to cause driveability problems, but not bad enough to cause "Oxygen Sensor Rich" codes.  If you

99 tahoe 5.7 vortec with multiple misfires under load/accelerating. So far Ive replaced; plugs, wires, cap n rotor, coil, egr valve, fuel filter, o2 sensors. Tested; vacuum, fuel pressure, OBD 2 scan.