My 89 Trooper 2.6L 4 cyl has 159,000 miles on it. It runs great but after it warms up and I stop at intersections, the engine idles up and down between 1500 and 2000 rpms. Any ideas?

Asked by Feb 16, 2013 at 04:22 PM about the 1989 Isuzu Trooper

Question type: Maintenance & Repair

When warm the engine idles up and down, 1500 to 2000 rpms.

1 Answer

Several things can cause loping like that. egr valve stuck, timing, vacuum leak

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

  • Isuzu trooper 88 4 answers

    I have isuzu trooper 1988 the engine is working great but its looping 1500-2000 rpm when its worm.and i want to change it with mercedes 240d engine will it fit on it or ? please help me!!!

    Isuzu Trooper

    -

    Maintenance & Repair

  • ticking/knocking noise 6 answers

    Hi, i have an isuzu trooper 2000, with 73k miles,I have a ticking/knocking noise which i hear iat about 2500-4000 rpm, can hear it in neutral when pressing gas pedal. One mechanic told me lower engi...

    2000 Isuzu Trooper 4 Dr LS 4WD SUV

    -

    Maintenance & Repair

  • cant turn engine off 1 answer

    trooper starts but when i turn ignition off engine keeps running i got to put in reverse to stop engine any ideas?

    1999 Isuzu Trooper

    -

    Maintenance & Repair

  • 1999 Trooper. Brake lights flicker, front turn signals flicker, and dash lights dim when brake applied. What is it? 1 answer

    NOTE: all problems listed started at the same time. Problems: Noise is constantly coming from shifter and brake lights flicker..... Happens when: Ignition is in ON position, running or not running, b...

    1999 Isuzu Trooper 4 Dr S 4WD SUV

    -

    Maintenance & Repair

  • when started rpms fluxuate between 1000 and 2000 rpms but when warm its fine 30 answers

    when started rpms fluxuate between 1000 and 2000 rpms but when warm its fine, is that normal for a golf gl? its an 1988 i just bought it and no nothing about vw's.

    1988 Volkswagen Golf

    -

    Maintenance & Repair

Search Isuzu Trooper Questions

Isuzu Trooper Experts

#1 N8dogg
N8dogg
Reputation 560
#2 tennisshoes
tennisshoes
Reputation 370
#3 DerekW85
DerekW85
Reputation 170
View All

Related Models For Sale

Used Toyota 4Runner
402 Great Deals out of 20,535 listings starting at $2,499
Used Mitsubishi Montero
154 listings starting at $2,499
Used Jeep Cherokee
378 Great Deals out of 54,518 listings starting at $2,495
Used Toyota Land Cruiser
29 Great Deals out of 1,200 listings starting at $4,500
Used Nissan Pathfinder
584 Great Deals out of 26,938 listings starting at $1,795
Used Jeep Wrangler
517 Great Deals out of 17,540 listings starting at $2,990

Used Cars For Sale

2002 Isuzu Trooper For Sale
20 listings starting at $3,489
2001 Isuzu Trooper For Sale
26 listings starting at $3,500