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

92,685

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.
3,495

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?

92,685

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

Add photo

Related Questions

Trooper

Looking for a Used Trooper in your area?

CarGurus has 91 nationwide Trooper listings starting at $2,950.

ZIP:

Search Isuzu Trooper Questions

Isuzu Trooper Experts

#1 N8dogg
N8dogg
Reputation 650
#2 tennisshoes
tennisshoes
Reputation 400
#3 DerekW85
DerekW85
Reputation 210
View All

Related Models For Sale

Used Toyota 4Runner
237 Great Deals out of 20,380 listings starting at $1,800
Used Isuzu Rodeo
243 listings starting at $1,800
Used Mitsubishi Montero
125 listings starting at $1,900
Used Toyota Land Cruiser
19 Great Deals out of 1,114 listings starting at $3,700
Used Nissan Pathfinder
263 Great Deals out of 22,565 listings starting at $1,995
Used Jeep Wrangler
271 Great Deals out of 18,084 listings starting at $2,950
Used Jeep Grand Cherokee
1,041 Great Deals out of 74,668 listings starting at $750
Used Ford Explorer
946 Great Deals out of 72,548 listings starting at $1,499
Used Jeep Cherokee
415 Great Deals out of 52,538 listings starting at $1,800

Used Cars For Sale

2001 Isuzu Trooper 4 Dr LS 4WD SUV For Sale
4 listings starting at $2,950

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.