I just picked up this '01 Tacoma 2.4 5sp. I have been driving it for a few days with no problems whatsoever. Today I stopped at the Suzuki (motorcycle) place for about 10 mins and when I came out my truck would not start.
I figured maybe I had run it out of gas since the gauge only works sometimes. I fill it up with a spare can the owner of the shop had laying around and it still wouldn't start.
So fast forward 9hrs and I have a new fuel pump, filter, made sure I was getting gas to the fuel rail, my injectors are firing (noid light and auditory test confirms).
If I spray starter fluid into the intake, the truck will run perfect for a sec then dies. This tells me my ignition system is fine.
The fuel pump was a warranty item from a few months ago so it cost me nothing to replace and the bed is off the truck, so it literally took 5 mins to do. After the new fuel pump I can start the truck and if someone blocks all air coming into the intake with their hand, it will run but just barely. If air is left to suck into the engine, it dies. If you tap the throttle, it dies.
I am not getting any fuel through my fuel return line off the bottom of the FPR, should I be? (if I take off the FPR I can see gas in the rail) Could the FPR be the problem? I'm thinking it might be fuel pressure, but I do not have the tools to confirm that.
Here is what some people have told me: vacuum leak (massive), catalytic converter, TPS, FPR, even the MAF. I'm getting really frustrated with this now and I hate leaving it in a parking lot somewhere. I'm gonna go back and fiddle with it more tomorrow morning, but I need some ideas of what to do. I'll try searching some more on the forums, but any help is greatly appreciated.