No power to injectors

Asked by Aug 13, 2015 at 04:52 PM about the 1992 Isuzu Trooper 4 Dr LS 4WD SUV

Question type: Maintenance & Repair

I have a 92 trooper that was running fine. One day it would not start. I checked all
fuses and wires and found no voltage to injectors. While trying to trace down the no
voltage issue it started and ran fine for a day. Now it is back to no voltage to the
injectors.
It has spark/power to ignition control module.
Power to fuel pump.
No power to fuel injectors.
Does anyone know how or what pins to test on ECU for the fuel injectors?

4 Answers

105,305

The ECM only provides the trigger signal to the injectors and that signal is a ground, I have ran across some of these rig loosing connection at the voltage dropping resistor for the injectors, might be worth a look and make sure it is connected properly and the case is grounded properly.

2 of 2 people found this helpful.
4,025

Do AGREE with #tennisshoe, ground on injectors kept me busy for days.

Great thought, but I don't think it is the case here. I tested (with ohm meter) the wires from injectors to exterior resistors, resistors to ECU and then ECU all the way back to the injectors. All measure good. Any other thoughts?

105,305

I think this would be a situation where the wiggle test would be the best thing to try and watch for power dropping in and out as you go down the harness.

Your Answer

Trooper

Looking for a Used Trooper in your area?

CarGurus has 81 nationwide Trooper listings starting at $1,895.

ZIP:

Isuzu Trooper Experts

  • #1
    N8dogg
    Reputation
    730
  • #2
    tennisshoes
    Reputation
    460
  • #3
    DerekW85
    Reputation
    210
View All

Related Models For Sale

Used Isuzu Rodeo
220 listings starting at $1,350
Used Toyota 4Runner
339 Great Deals out of 26,034 listings starting at $1,800
Used Toyota Land Cruiser
16 Great Deals out of 1,039 listings starting at $3,995
Used Mitsubishi Montero
118 listings starting at $2,950
Used Jeep Cherokee
497 Great Deals out of 60,770 listings starting at $1,995
Used Jeep Wrangler
462 Great Deals out of 19,209 listings starting at $2,500
Used Nissan Pathfinder
480 Great Deals out of 25,077 listings starting at $2,388
Used Isuzu Amigo
10 listings
Used Ford Bronco
209 listings
Used Ford F-150
3,179 Great Deals out of 218,651 listings starting at $1,200
Used Land Rover Range Rover
67 Great Deals out of 4,325 listings starting at $2,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.