1992 Toyota Pickup No Power to Injectors

2012 TOYOTA PICKUP
Avatar
SEAN1073
  • MEMBER
  • 4 POSTS
hi...i have a toyota truck..2wd..1992...170+ miles.. reg cab..stick..what the prob..is it wont start..i check for 12 volts and not geting any at the fuel injectors or cold sensor..but if i put a 12 volt generator at the cold start injector the one on top of the throttle body...it would run...but then die when i could not keep up with the timing...!!! i replaced the O2 sensor and the fuel pump three times and the battery..now some one on justanswers.com said it might be the electronic starter relay and gave a schmatic and it shows the injectors coming off the relay..but is that true and could it be something else before i pay them...can you help...??? thanks sean
Apr 18, 2006 at 3:47 PM
Advertisement
Avatar
LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Sean , it is a good idea to ALWAYS go back to basics when trying to solve a problem like you have and not replace a lot of parts.. Before you do anything check ALL fuses.

The power to the injectors come directly from the ignition switch on a red/black wire.. It is a separate portion of the switch that is fed 12V from fuse AM-2. It is either one of the following.

1 Bad fuse
2. Bad ignition sw (rare)
3. Broken connection where the wires split to go to the ignitor. Check the red/black wire on the ignitor. If that has 12V then the problem is the connection where 4 wires are connected. If not the problem is either the switch or the fuse.

Good luck
Apr 19, 2006 at 10:55 AM
Avatar
SEAN1073
  • MEMBER
  • 4 POSTS
thanks for your help and i will try this way...again thanks.. sean
Apr 19, 2006 at 12:59 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.

Suggested Repair

Check all fuses first, especially AM-2. Injector power comes from the ignition switch on a red/black wire. If that wire has 12 volts at the ignitor, inspect the splice where the wires split; if it does not, suspect the fuse or, less often, the ignition switch.

Conversation Summary

A 1992 Toyota truck will not start and has no 12 volts at the fuel injectors or cold-start sensor. It runs briefly if 12 volts is applied to the cold-start injector, then dies. The owner replaced the oxygen sensor, fuel pump, and battery and was told an electronic starter relay might be involved. The expert advised checking basics first: fuse AM-2, the ignition switch, and the red/black injector power wire and its splice at the ignitor. The owner said they would try that.

Related Repair Questions

Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle