Car Problem Solver

A rough idle can be caused by vacuum leaks, ignition misfires, fuel delivery problems, or sensor faults. This guide explains how to diagnose unstable idle step-by-step and isolate the real cause instead of replacing random parts.

An engine misfire can be caused by ignition failure, fuel delivery issues, vacuum leaks, or mechanical problems. This guide explains what misfire codes mean, how to isolate the affected cylinder, and how to diagnose the root cause without guessing.