JRush89

i have a 2001 silverado 1500 5.3L and i am having problems with a random/multiple cylinder misfire. ive changed the spark plugs (AC Delco), replaced the intake manifold gasket, and checked the fuel pressure and checked for moisture in the fuel. the misfire also seems to be occurring on the drivers side only. any ideas on how to resolve this?? thanks.

country_09

Changed wires too? Could be messed up in the boot and not even know it

JRush89

The wires are fairly new. (2-3 years)

oldchevy

Are you getting a check engine light? The wires could still be bad with 2 or 3 years on them. I always say do not overlook the obvious!

JRush89

Yes. My light flashes to show misfire.

country_09

If it's flashin, then that means a big misfire. I'd pull the plugs and inspect the wires just to be sure. Check the cats as well. My stock ones were clogged and caused a flashin SES light to come on

JRush89

I just put new plugs in last week hopin that was the problem. I am also gettin a low voltage to O2 sensor code

JRush89

Wires are very clean and no damage. Good connections to all 8

country_09

Check that o2 code....is it driver side?

JRush89

It don't specify for some reason