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1992 Isuzu Truck fuel injection

Tiny
BRANDYWTR
  • MEMBER
  • 1992 ISUZU TRUCK
  • 6 CYL
  • 4WD
  • MANUAL
  • 100,000 MILES
My 1992 isuzu truck would at times start fine and at times would turn over but would not start. I left it sit idriveway 6 months + and now wont start at all. After checking a few thing s I found out im not getting voltage to my fuel injecters when I i turn motor over, so what would cause this?I have already replaced the computer. Its a TBI Fuel injection unit.
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Friday, June 5th, 2009 AT 9:31 PM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi brandywtr,

Thank you for the donation.

I need the following info to get the correct diagnostic data to assist in solving this problem.

1. Engine type.
2. Vehicle model.
3. Vehicle Identiication Number.
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Saturday, June 6th, 2009 AT 12:36 AM
Tiny
BRANDYWTR
  • MEMBER
  • 2 POSTS
Engine type---V6 4x4 Vehicle Model---1992 Isuzu pickup truck Vehicle ID----4S1CR11ZXN4225265
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Saturday, June 6th, 2009 AT 3:00 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
At the injector there are 2 wires, 1 for each injector that receives power supply from the ECM relay.

From ECM relay wire color is Light Green/Black and at injector it is branched into Light Green/Black and black/Blue.

Test the ECM relay and its power supply. since problem is intermittent, I would suspect the relay or its circuit to be faulty.
Item # 9 is the ECM relay.


https://www.2carpros.com/forum/automotive_pictures/192750_CompEng92Isuzu6cyl_1.jpg

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Sunday, June 7th, 2009 AT 2:42 AM

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