Misfiring
Asked by GuruTRYZY Jul 14, 2018 at 01:34 PM about the 2011 Chevrolet Silverado 1500 LT Crew Cab 4WD
Question type: Maintenance & Repair
Have a 2011 Silverado engine light came on took it to parts store hooked it up
to computer it said #7 was misfiring the engine light went off the next day two
weeks later the engine light came back on said the smarting #7 is misfiring
going to change plugs Wil this solve the problem and what is it with the #7
every thing I've read it's been on the #7
5 Answers
Might be a bad plug, plug wire, or more likely a bad coil. Swap the coil to one of the other cylinders and see if the problem follows. That way you can know for certain what was causing the issue. Hopefully for you it's a minor enough problem a tune up will fix it without getting into injectors or more serious issues like valves or head gasket.
Thanks for the feedback ill try that and hope it's not something more serious thanks again May GOD ride with you
The easiest thing to check would be the coil, each cylinder has it's own (called a COP or "coil on plug"), unplug the one of the missing cylinder and swap it to one of the other cylinders, and wait for problem to reoccur. If problem shows up on that other cylinder, then you can safely assume it was a bad coil.
Thanks for the advice will try that May GOD ride with you
I had the same issue and it turned out to be high resistance on one of the injector connectors. replaced the connector and all good now. pour water over the connectors and see if it get worse to find the bad one.
