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

116,055

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 people found this helpful.
4,495

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?

116,055

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 47 nationwide Trooper listings starting at $2,500.

ZIP:

Isuzu Trooper Experts

  • #1
    N8dogg
    Reputation
    770
  • #2
    tennisshoes
    Reputation
    480
  • #3
    DerekW85
    Reputation
    220
View All

Related Models For Sale

Used Toyota 4Runner
268 Great Deals out of 34,348 listings starting at $1,995
Used Isuzu Rodeo
139 listings starting at $2,380
Used Toyota Land Cruiser
14 Great Deals out of 1,160 listings starting at $5,500
Used Jeep Cherokee
354 Great Deals out of 70,600 listings starting at $2,995
Used Jeep Wrangler
226 Great Deals out of 16,663 listings starting at $3,000
Used Nissan Pathfinder
286 Great Deals out of 24,031 listings starting at $1,995
Used Mitsubishi Montero
96 listings starting at $1,650
Used Isuzu Amigo
5 listings
Used Ford Mustang
266 Great Deals out of 37,716 listings starting at $1,350

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.