No start

1990 TOYOTA PICKUP
130,000 MILES • 2.2L • 4 CYL • 2WD • MANUAL
Avatar
RICH135
  • MEMBER
  • 2 POSTS
Truck turns over but will not start. Jumping B+ and fuel pump at diagnostic port will not do it, but jumping from fuel pump directly to battery positive post will start the truck. Took out circuit opening relay and attached a twelve volt source to STA and E1 which closes points and allows continuity between B+ and fuel pump . Without the twelve volt source have continuity between STA and E1, B+ and FC. No continuity between B+ and fuel pump.
Oct 30, 2017 at 2:32 PM
Advertisement
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Apart from the circuit opening relay, there is the main relay which supplies power to the fuel pump.

A faulty MAF can also cause the problem.

Check out the link for the wiring circuit diagram.

https://www.2carpros.com/questions/toyota-pickup-1990-toyota-pickup-fuel-pump-relay

Oct 30, 2017 at 4:23 PM
Avatar
RICH135
  • MEMBER
  • 2 POSTS
I found that the problem was the fuel injector relay. I seemed to test OK, but putting in a new one did the trick. Thanks
Nov 8, 2017 at 3:43 PM
Avatar
KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
Glad to know you have the problem solved.

Have a great weekend.
Nov 10, 2017 at 10:31 PM
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