2000 Chevy S-10 Engine surge

2000 CHEVROLET S-10
162,000 MILES • 6 CYL • 2WD • AUTOMATIC
Avatar
ONEICGOD
  • MEMBER
  • 2 POSTS
Engine surges from an idle to about 35 mph. Also surges when under load to about the same mph. New distributor, TPS. Map approx 9 months old. Tune up about 60000 miles ago. Truck idles fine, runs great above 35 mph. Plenty of power on the highway for passing. What other problems could cause this surging issue?
Aug 14, 2009 at 8:58 AM
Advertisement
Avatar
RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
Aug 14, 2009 at 10:05 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle