2002 chevy z 71 what makes it run rough
Asked by Guru9FXS7S Nov 28, 2022 at 06:06 AM about the 2002 Chevrolet Silverado 1500 LS Extended Cab 4WD
Question type: Maintenance & Repair
when it starts raining it starts running rough and the servese engine light starts
flashing and no power
3 Answers
beatupchevy answered about a year ago
Sounds like an ignition problem setting off a limp mode , I'd get it fixed before you burn a valve or something
The truck's twenty years old and likely has the original ignition wiring. Often, and I mean most often, when you have this kind of problem, it's plug & coil wires that are brittle and cracked. They allow moisture to migrate inside and interfere with firing. Try this: on a dry day, find a dark place and spray a mist around your running engine. You'll see sparks moving between wires and grounds.
Yep sounds like your ignition wiring is in need of replacement, better check those coil towers for carbon tracks.
