1992 Toyota Truck 4X4 -does not stay started

Tiny
DAP1848
  • MEMBER
  • 1992 TOYOTA PICKUP
My 1992 Toyota Truck 4x4 22 RE 4 cylinder 5 speed, about 90k miles has been stalling for approximately 3 months.

In the beginning, the truck would start and would stall when the AC was turned on. I replaced the Mass Air Flow meter as it would stay running if we moved the flapper door. It ran for about a week and then began having problems again. Regardless of anything being on, the truck will start and die after about 5 seconds. It will only stay started now if you hold the ignition in the start position, or if you put a good amount of starter fluid in the intake.

I have checked for vacuum seals/leaks but there are none. I've replaced the fuel pump, filter, ignition coil and ignitor. I've checked the throttle position sensor and maf-both tested fine. I've cleaned the throttle body with a tooth brush. I've replaced the distributor (though we aren't sure about the timing). I've checked the computer and it does not show any coding. We have ordered another computer but it has not been installed yet.

My son is a mechanic and we are both stumped as to what else we could do to try to fix it (except paying 300 for a diagnostic at Toyota). Could it be a sensor? Any ideas?
Wednesday, March 7th, 2007 AT 10:05 PM

4 Replies

Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Try a main EFI relay? What is it losing when it dies?Fuel, spark, injector pulse?
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Thursday, March 8th, 2007 AT 7:58 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
EFI relay goes bye-bye on you-equals to No Spark/Fuel/Injector Pulse

Check the EFI and Igniton fuse-these two powers up the EFI relay and then to the circuit opening relay-then to the main sensors. This is how it goes in Toys.

These checks out-am hinting a problem with the red/white wire going to the ECM pin 1A
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Thursday, March 8th, 2007 AT 8:41 AM
Tiny
FISHERMAN
  • MECHANIC
  • 937 POSTS
Quote:
"It will only stay started now if you hold the ignition in the start position"

How about as simple as the ignition switch?
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Thursday, March 8th, 2007 AT 9:16 AM
Tiny
DAP1848
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  • 2 POSTS
Thanks for the suggestions. Turns out raz was right-it was the circuit opening relay! It's running great now!
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Saturday, March 10th, 2007 AT 2:27 PM

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