mygirl'syotamechanic

My girl drove the truck home and it was empty. I put 5 gallons of gas that had been in my garage (w/stabil added) for a couple of months in my girl's 4runner. It wouldn't start. I added another 5 gallons of fresh gas and some B-12 fuel treatment. Still won't start. I feel like an idiot. Before I go and drain the tank and fill it up again in hopes of a miracle I was hopping for some advice or direction to guide me.

niall

When you say it was empty, like almost dry? When older tanks are run that low, lots of time they suck sediment into the fuel lines or pump.

Do you have gas at the motor? If not, is the pump running, and when was the last time the filter was changed.

Just some things to look at. If it hasn't ran with the bad gas in it, it's unlikley you caused any serious damage.

wyoming9

iTrader: (1)

Try the fuel filter.

i have had very bad luck with the gas stabilizer it was the only vehicle I put it in .

That I ended up pulling the pump and filter

All the others I never used it no real problems getting running after a few months or years.

mygirl'syotamechanic

it wasn't bone dry when i added the fuel. and the filter and the pump are pretty new (a little over a year old) I replaced them when the old fuel pump died. This one is still working.

niall

Do you have Fuel at the Motor? You May have just flooded it on the bad gas, maybe crank it with the plugs disconnected, or the fuel pump fuse pulled. That'll help clear it out a bit.

Dave the welder

find the schrader valve on the fuel rail and see if it squirts gas. hit the key and listen for the sound of the fuel pump. Check for clicking fuel pump relay. Then take off the air intake and squirt some carb clean in the t body and see if it fires. Then get a test light to see if your gettin power to the pump.

mygirl'syotamechanic

well, niall was right. Just flooded it on the bad gas. Or just flooded it period. Either way she's running again and my fears of having to replace injectors or filters are gone. Thanks guys.

scope103

I've never seen (or heard of) a Toyota truck with a Schrader valve on the fuel rail. Of course, I haven't seen every truck, so Dave may know something I don't.

With the key to "ON" the fuel pump should NOT be running. With the key to "START" the fuel pump will run, but I sure can't hear it over the sound of the starter.

Dave the welder

Now that i think about it your right again well kind of. If there is no fuel in the cold start injector wouldnt the pump have to run to prime the system? I have never had a issue with a toyota not starting but have had MANY issues with gm products and if you don't hear the pump for a couple seconds with the key "on" then thats a sign something is wrong.

My post was general field diagnosis and should have been more toyota realted.

scope103

On Toyota trucks, the Circuit Opening Relay (COR) turns the fuel pump OFF as soon as the engine stops sucking air through the VAF. If you get in an accident that breaks a fuel line, you don't want the pump running!

The COR will run the pump with the key in the START position, then the VAF signal takes over.

There is a check valve in the pump to hold pressure in the fuel rail with the pump off. If my truck sits for a week or so, that pressure will drop far enough that I have to crank it for a second or two to re-pressurize the rail. (There's no air in that line, so it isn't a matter of "priming" the line.)

I don't know anything about GM vehicles since the days of mechanical pumps, but I suppose that it's possible that some will run the pump (just for a few seconds) with the key to "ON" to re-pressurize the fuel rail. So you might be able hit the key and listen for the pump, but I don't know.

General field diagnosis is good, but telling somebody to "listen for the pump" when the pump is SUPPOSED to not be running may not be helpful.

Stuwy123

iTrader: (1)

Jumper the fuel pump. FP and B+, I believe, in the diagnostics. Best check that one in the service manual.