Fuel Pump?

[flyguy376]

Wanted to see if anyone has a thought...

My '01 SR5 T4R cranks, but wont fire. It did this once (while hunting in NE), then fired right up and drove 500+ miles w/no problem. Now it's dead again. Right when it happened, it would start briefly, lope @ a low RPM, then kill. It only did this twice and now only cranks.

I just replaced the fuel filter yesterday (hoping for a simple, cheap plugged filter), but still no fire. I left the 'upstream/in' fuel line loose and tried to crank it...no fuel sprayed.

This pretty much means no fuel is being supplied, i.e. a bad pump right?!! Just want to check my "math" and see if anyone has a better thought.

Thanks

 

[shootmymime]

turn the key to "on" position but dont start it and you should hear the pump kick in for 1-3 seconds inside the tank. helps to have someone else run the key while u listen. sometimes if you do it a few times (and it is working) it wont run because it has already built up pressure int he system.

 

[flyguy376]

turn the key to "on" position but dont start it and you should hear the pump kick in for 1-3 seconds inside the tank. helps to have someone else run the key while u listen. sometimes if you do it a few times (and it is working) it wont run because it has already built up pressure int he system.

Wouldn't this quick pump kick still cause a fuel dump @ the loose filter line (if it's working)?

 

[shootmymime]

Wouldn't this quick pump kick still cause a fuel dump @ the loose filter line (if it's working)?

maybe if you have an open line and its not building pressure. that would blast fuel all over the place.

 

[BlackCat914]

Wouldn't this quick pump kick still cause a fuel dump @ the loose filter line (if it's working)?

Yes, you're already a step ahead of what he's suggesting, so I'd disregard his advice. Your next step is to verify power and ground at the pump. If its there, then the pump is no bueno.

 

[shootmymime]

Your next step is to verify power and ground at the pump. If its there, then the pump is no bueno.

that's easier said than done.

 

[BlackCat914]

that's easier said than done.

most everything is easier said than done. Are you suggesting he somehow avoids a diagnostic procedure because it's too difficult or time consuming to do? I hate to break it to you, but if it does in fact need a pump, the tank has to come down anyways. I know you're young, but in most cases in the automotive repair industry (at least the 10 years I've been doing it in union GM dealerships), the diagnosis typically takes longer to do than it does to actually make the repair.

 

[Lavender Steel]

Your next step is to verify power and ground at the pump. If its there, then the pump is no bueno.

+1

Your 'math' pretty clearly suggests a bad pump - this will confirm that.

 

[Gerdo]

turn the key to "on" position but dont start it and you should hear the pump kick in for 1-3 seconds inside the tank. helps to have someone else run the key while u listen. sometimes if you do it a few times (and it is working) it wont run because it has already built up pressure int he system.

When I had pump issues, I tried this. I was never able to hear the pump.

 

[Drcoffee]

You can Hotwire the fuel pump thru the access panel under the rear drivers side seat. An easy test would be to energize the pump and then look for fuel leaking at the loosened fitting as before, or try to start the engine. If it starts, the issue is in the wiring if it still won't start, it's the pump.

There is also the crank sensor to consider

 

[flyguy376]

You can Hotwire the fuel pump thru the access panel under the rear drivers side seat.

Is there an access panel in the '01 T4R? Saw a youtube that showed one on a '00 Rav4, so I was hopeful that I might have one!

 

[5280nrg]

Go to the simplest fix first. Try replacing the Fuel pump relay. They do go bad. Had the same issue on a mustang I had. Spent a boat load of money on a new pump and it ended up being the relay... just a thought.

Edit: also check to see if the inertia relay has been tripped. There is one on all fuel injected cars. The fuel pump hot at start wire runs thru it before it goes to the fuel pump. If it is tripped, no power to the pump; this is a circuit "break" built into the system to keep the pump from running should the car be hit in an accident. Not sure where they are on a T4R but I would investigate.