I have a 93 4runner 3.0 AT, the problem is I can start it and drive it five miles a day then park. Once I get back in it to go somewhere it will not start, but if I pull the little hose off of the air intake and pour some fuel in it will start up. If it sets for hours it will usaully start up with no problem. Here is a list of what I have done to try to solve my proble.
1) timing set
2) igniter
3) coil
4) temp sensor
5) MAF
6) computer
7) replaced fuel pump and filter twice
8) plugs,wires,rotory button,cap, and air filter
9) tested cold start injector and timer,EFI relay, and TPS
Also I have a led test light and I grounded it to the engine and connected the other side to both of the injector wires while truck is running one wire at a time of course and the light stays solid and never fluxuates. When I test the cold start injector with it running the light fluxuates, I can hit the throttle real fast and the light get brighter as the engines rpms go up but as the rpms drop back down the light goes off, when it reaches idle the light is back on fluxuating. the light never turn off at all while at idle. If anyone has any suggestions I would be thankfull, this has been a problem for over two years. I forgot there are no codes showing up in the computer.

 

There is a small "choke" style injector mounted on the passenger side of the plenum. Look for the banjo fitting on a fuel line running towards that location. I have forgotten the specific name for that particular part, but it basically adds fuel to the intake.

Try this: Get a rattle can of starter fluid and the next time the motor wont start, spray some of that into the intake (i.e. just above the driver's side head lamp). It'll probably start right up!

 

thanks for trying to help but I have tried that, but I use gas instead of starting fluid to start it.

 

See:
- http://www.4crawler.com/4x4/CheapTri...shtml#FuelPump

 

Symptoms sound like vapor lock on fuel system.

 

I figured it out finally, the cold start injector harness were it plugs into the injector was bad, thanks for the suggestions.