spike_strip

Hello all--


I have a 91 runner, manual, 6cyld.


It is getting rather cold in the mornings. And recently I have not been able to start my truck.
On several attempts, it has started and ran for a second and then died; after repeated attempts to re-start her, she is obviously flooded. If I wait until the outside temperatures has warmed (11:00am)...she starts no problems and I have never had this issue, previous to these very cold mornings.


I have taken my truck to a local mechanic and he has confirmed, that when it will not start, it is flooding and he is not sure why.


Has anyone had this issue or could someone advise on what needs to be replace to allow my truck to start in the mornings?


Any feedback is much appreciated...

Tubbyfatty

you cant flood an EFI motor unless an injector is stuck. Im guessing something to do with the cold start injector on the intake plenum on the pass side.

spike_strip

Thanks for the response.


The mechanic has stated that there is a sensor on the back of the head that sensuous the temp and tells the injectors how much fuel is needed. It this sensor is reading incorrectly (to cold); therefore, supplying to much fuel...then it will flood.


I am not a mechanic and do not know what is need to fix the problem...just passing on what my mechanic said.


He wants to replace this sensor and he is not sure if this will fix it or not; he said... best guess for where to start.


I am reluctant to take this path because it could cost me much cash to guess what is wrong and fix it.

Tubbyfatty

Search on here for "cold start injector".

Also, if anyone else has an idea, chime in haha

DupermanDave

You can defenitely replace it yourself. The temperature sensor (and cold start injector) are on the front of the engine. Just buy the larger deep socket to fit ($15 at autozone) and the sensor ($15 on amazon) and fix it yourself. I did it last winter and it is as simple as unscrewing it and screwing in the new one. Just like a bolt.

Tubbyfatty

Isnt this on the 3vz? Isnt the temp sensor at the back on the 3vz? But you can do alot of things to this truck as long as you have a 10mm, 12mm and 14mm wrench and socket.

I just pulled off the intake plenum (it says 3.0 efi on it) in my garage twice the other week. I have basic hand tools and it only took me a few hours.

spike_strip

Yes, this is the engine type (3VZ-E) and that is where my mechanic said it was located.

DupermanDave

Ah, I assumed it was the 22re. Silly me. It should still be easy to replace yourself. I've done 3 temp sensors in 3 different engines and it was a cinch.

abecedarian

Also, if the auxillary air valve isn't operating properly, it may not be raising the idle high enough for the engine to burn the extra fuel injected with the cold engine, kind of like what happens with a carburetor if the choke sticks closed when the engine warms up.