truck just dies

Before you do that, take the fuel line off, and put it into a bucket. Turn the ignition to the on position and see if your fuel flow changes. I don't know if the Tacomas have a timed pump shut off or a back-pressure shut off, but if it keeps flowing I wouldn't bother dropping the tank.

 

I saw your post where you said you changed the filter and checked the pump and lots of gas was coming down the fuel line (make sure you installed the filter with the flow in the right direction). That would suggest your tank pickup is not clogged. If this were an old beater that might be a possibility, but if this is a decent pickup, it's not a likely thing. I still think it's in your fuel delivery system, but I'm not much good on EFIs. I would start looking at the fuel injection system. Not the injectors themselves, but the high-pressure delivery from the low pressure fuel line on. There may be a faulty solenoid or sensor that heats up then fails, shutting off the fuel delivery. Like I said, I'm not much good with EFIs. Gimme a carb and I can figure it out.

 

I agree that it most likely a fuel delivery problem but don't rule out your air. I'd check your bypass valve, if it's dieing at idle it may be sticking, just take it off and give it a good spray down with some carb cleaner.

 

changes how what do you mean?

 

what solenoids are on the fuel rails?

 

I don't know. This is my first Taco and I haven't even looked at the injection system. I just figured that since it has electronic fuel injection, there must be some sort of electronic regulation to it. It wouldn't be on the fuel rails, but there must be some sort of fuel block between the low-pressure fuel line-in and the fuel rails that has some sort of electronic regulator, but this is outside my experience. Somebody else will have to help with that. Sorry.

 

I mean that if the flow isn't constant or consistant your problem could be the pump. Some pumps have an auto shut-off, but I don't know if the Tacomas have one or not. In my old 74' Scout, you could take the fuel line off, put it to a bucket, turn the key to the "ON" position, and you would have a constant flow of fuel into the bucket (or gas can).

I agree with thenrie, though. I think your problem is further forward.

 

I FOUND IT
the problem is moister got into the computor and arched on the curcit board i am going to try and clean it up but i think i need a new board

 

Boy, I'm glad we solved that one! Next?

Just kidding. I never would have thought it would be the computer. I'll have to add that one to my bag of tricks..er..experience. Glad you got it figured out.

 

I can't speak for Taco fuel pumps but I had something similar happen with my old S-10 (when on Fuel pump number 3). You could hear the fuel pump, it was obviously pumping, however it was not pumping with enough pressure. It was producing about 50% of the required pressure needed for the injector lines to charge and run the engine properly.

You should be able to have a mechanic check the fuel pressure fairly enexpensivly. Also, the way it was acting before essentially failing all together is similar to my experience with fuel pump number 2 when it died (on the truck).

 

thanks for your help

 

Sorry we didn't figure that one out earlier...