Ok so here's the story.... I was driving down the road one day and it just all of a sudden died on me. it would turn over but wouldnt fire. I got it towed home cuz i was close and looked at it the next day. I noticed the efi fuse was popped, so changed it, went to start up, and it popped again. So I came online looking for suggestions and I found that there were some wires coming from the O2 sensor after the cat that got hot from the exhast and melted together. So I repaired these wires, also I noticed a plug like a foot away that had rubbed on the framerail and was corroded, so I cut out the plug and hard-wired it. It ran great for a couple weeks. The other day I drove around town all day, came home and parked it everything was fine. took a nap and came out a couple hours later and it starts up, runs about 2 seconds, then dies. No popped fuses. I checked all the wires for both O2 sensors again all is good. Checked the plug for afm several times its clean and seems to have a good connection. No trouble codes. I'm getting spark. Please someone tell me what to do next I'm pretty stumped. How do I test the fuel pump and does that seem like a likely culprit?

 

My question is: which one is it? I can see it on the schematic, but no location. Same general issue: it will crank all day, but no fuel to the injectors. Chased wires for a bit and have no voltage going to the pump. Swapped the EFI relay (it was toast as well), and now have good voltage coming from there...so I'm down to the COR...but don't know the physical location.

Thanks!

 

http://www.ncttora.com/fsm/1990-1995...c/relayloc.pdf (page 19)

 

Thanks, Scope! Very handy.

 

@razed: Yeah, I jumpered the COR yesterday while I was playing (after I read your earlier post), and the pump comes on. Have to swap the relay today, weather permitting. (I hate apartments...)
However, I had no idea of the physical location until I saw the FSM link that scope put up. I'd previously swapped the head gasket (which started this mess), and still have the kick panel torn apart from pulling the harness out of the way. I've pretty much looked right at it a hundred times, & if it were a snake it would have gotten me good.
290,000 miles and everyting seems to be dying at the same time...
Thanks again, y'all.

 

Thats totally my cold start problem as well.
where were you guys on my thread???
I'm going to pull the relay and clean it tonight.

I'll call toyota but I'm sure they will want $478 for the part or something stupid like that. That is exactly what they wanted for the cold start injector timmer sensor. I'm glad I didn't buy it because thats not my problem.

 

just got off the phone with Toyota. they want $175 for that relay.

 

check all your grounds,
chassi, ground
the ground on the back of the head.
the efi ground the bolts to the intake... highly important.. engine wil start but then die, and only stay running if you stay in the gas pedal...

you may have differnt issues but it never hurst to check..

keep to the basic's and you should have no issues you cant handle...

 

Could fouled spark plugs and bad wires cause it to die after running for a min or 2? I am having the same problem, but I have fuel pressure and everything electrical is good!

 

Bad Ground for the ECU. Check your ground on the intake manifold. I had the same problem on my 22R-E Celica

 

Thank you for the ground wire recommendation, my 91 22re was intermittent withits acting up. The ground wire at the back of the engine attached the firewall was broken. It would run when the bare wire was touching the motor . Hysterical but thanks for the easy fix