Take the 2-minute tour ×
Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It's 100% free, no registration required.

What should I be looking at to diagnose my Ford Ranger which surges when stopped? This typically only happens while the vehicle is warming up. After that, it's fine.

share

2 Answers 2

up vote 5 down vote accepted

My first thought is to clean the throttle body and Idle Air Control (IAC) motor passages with carburetor or throttle body cleaner. They get a black buildup on the edge of the throttle plate and IAC passages that interferes with the idle speed regulation.

share
    
Thanks, I'll give that a try. –  Valdis R Jul 12 '11 at 19:29

As Larry said, check the throttle body and the IAC, but I'd also check for vacuum leaks.

share

This site is currently not accepting new answers.

Not the answer you're looking for? Browse other questions tagged .