1998 Isuzu Trooper High Idle and CEL

1998 ISUZU
Avatar
CHADDER9
  • MEMBER
  • 1 POST
I have a 1998 isuzu trooper 3.5 liter. it has about 130,00 miles on it and the check engine light is on. ther were 2 codes one for egr and one for maf both were replaced to no advail. it also idles really high. i was wondering if you had any advise.
Mar 24, 2006 at 3:38 AM
Advertisement
Avatar
KENB79764
  • ✓Experienced Mechanic
  • 52 POSTS
may be a vacuum leak, this will set these codes and cause high idle. check all vacuum hoses and replace any dry rotted or cracking. you can also lightly spray carb cleaner around vacuum hose areas and listen for idle change to narrow down vacuum leaks.
Apr 5, 2006 at 1:51 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.

Suggested Repair

Check all vacuum hoses for dry rot or cracks and replace any damaged hoses. A vacuum leak can set EGR and MAF codes and cause high idle. Lightly spray carb cleaner around vacuum hose areas and listen for an idle change to locate the leak.

Conversation Summary

Owner of a 1998 Isuzu Trooper 3.5L with about 130,000 miles reports a check engine light and high idle. EGR and MAF codes were present and both parts were replaced without improvement. Expert suggests a vacuum leak may set those codes and cause high idle, and recommends inspecting vacuum hoses and using carb cleaner spray to locate leaks by listening for idle changes.

Related Repair Questions

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