Customer came in with a misfire with no codes. a tune up with new coils/plugs was done as well as new valve covers. after repair cylinder 1 started to misfire much more violently. misfire only happens when driving above 4000 RPM for approx 30+ seconds,...

FIX posted 4/21/2023

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle