Why does my Vortec 5300 have a misfire?
Why does my Vortec 5300 have a misfire?
MISFIRE MYSTERY!!! I have a misfire that cannot be diagnosed!!!! 1999 5.3 Sierra. My engine has been rebuilt because of a dead #7 cylinder at 167800 miles. We figure a weak coil caused this.
What causes a misfire on a Chevy Silverado?
Driving with a misfire can damage the vehicles catalytic converter. The engine is also not firing all of the fuel, so raw fuel is also passing through cylinder 3 into the exhaust. Mileage may suffer as well when your Silverado has P0303. P0303 is a cylinder specific misfire code, which means that Cylinder 3 is misfiring and causing the code.
What kind of engine does a 1999 Silverado have?
Problem vehicle, 1999 Chevrolet Silverado 1500 5.3L V8 2WD with 351,000mi. I’ve read numerous threads on the rough idle cold start and the engine having some sort of intake leak and I don’t believe I have this problem, but I could be wrong.
When did GM start using Vortec on the Chevy Silverado?
In 1996, GM began implementing the vortec features on there engines. This included redesigned heads for improved combustion and an intake that has better air flow. It also brought about sequential fuel injection that allowed more precise control over the air/fuel ratio.
MISFIRE MYSTERY!!! I have a misfire that cannot be diagnosed!!!! 1999 5.3 Sierra. My engine has been rebuilt because of a dead #7 cylinder at 167800 miles. We figure a weak coil caused this.
Driving with a misfire can damage the vehicles catalytic converter. The engine is also not firing all of the fuel, so raw fuel is also passing through cylinder 3 into the exhaust. Mileage may suffer as well when your Silverado has P0303. P0303 is a cylinder specific misfire code, which means that Cylinder 3 is misfiring and causing the code.
What happens if you misfire the catalytic converter on a Silverado?
Unlike a lot of the OBDII codes, this code has to do directly with engine combustion. Driving with a misfire can damage that catalytic converter. Raw fuel is also passing through the cylinder into the exhaust. Mileage may suffer as well when your Silverado has P0302.
What is the trouble code on a Chevy Silverado?
P0303 is certainly a cause for concern, and can be a threat to the drivability the Chevy Silverado. The nice thing about P0303 is that it’s a cylinder specific trouble code, which makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring. It will often be accompanied by codes P0301, P0302, etc….
