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94 toyota paseo - fuel delivery
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neutronscott
New User
Sep 17, 2011, 3:50 PM
Post #1 of 9
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94 toyota paseo - fuel delivery
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car was running and stopped. would not restart. towed it home. began to start next day, stopped after a couple seconds. using accelerator drowns it quicker.. i guess mixing more air with no fuel would do that. i bought a 3-step fuel system cleaner thinking just some clog from gas tank (it was about 1/8 full when happened). car stayed running with the cleaner attached to intake PCV hose.
i removed back seat and can hear fuel pump. couldn't remove fuel filter, but removed the lines and was able to blow through it.
i have not / can not test pressure, but no fuel sprayed when removing lines from filter.
i am far from a car mechanic, i'm a computer geek. but on the far end of the fuel bar across top of engine i removed another fuel banjo fitting (?) and no pressure, but gas is there...
thusly, i suppose there is no clog and it is the pump, although i hear it run. sound reasonable, should i just try replacing it next?
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 17, 2011, 4:13 PM
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Re: 94 toyota paseo - fuel delivery
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Fuel pumps don't clog. You are going to have to test the fuel pressure and the electrical circuit so if you don't feel capable of that, you need to send it to someone else to do that.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Sep 17, 2011, 4:16 PM
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Re: 94 toyota paseo - fuel delivery
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Your probably on the right track. If no fuel is coming out of the line when the pump is running, you should pull the pump out and take a look. Hopefully you have enough fuel in the tank. If you do end up replacing the pump, look in the bottom of the tank for any contaminants. Any metal shavings or other foreign matter can take out your new pump. There is also a rubber hose that attaches to the pump outlet and to the sender supply pipe that could have rotted away.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Hammer Time
Ultimate Carjunky
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Sep 17, 2011, 4:45 PM
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Re: 94 toyota paseo - fuel delivery
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I guess we're ignoring the electrical?
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
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Sep 17, 2011, 5:34 PM
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Re: 94 toyota paseo - fuel delivery
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Well, you could do a volume test if you don't have a gauge.
Remove the line from the fuel rail and turn the pump on. You can activate the pump without starting the engine or turning the ignition on. Just go to the diagnostic connector under the hood and use a jumper wire and jump FP to B+. That will send power to the pump to turn it on.
DLC1 looks like this:
Measure the amount of fuel that comes out of the hose. The pump should move about a quart of fuel in 30 secs. You'll need something to allow the gas to drain into, so you can make your measurement.
If nothing comes out, pump is running, and fuel filter isn't plugged, time to remove the pump from the tank. If you have enough volume, you'll have to have someone check the pressure.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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neutronscott
New User
Sep 18, 2011, 8:46 AM
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Re: 94 toyota paseo - fuel delivery
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i was beginning to think an electric problem could keep all the EFI's from operating, i guess. so your method was a great idea and verified it's fuel delivery. i got out this morning hoping the diag port was labeled and it was.
i took the line coming off the filter to the fuel bar and put it into a 1gal gas can, and collected maybe between 1-2cup in 30sec.. 
it dripped out smooth and steady. just slow. so if this is the incorrect amount, i'm left with just filter, supply line, pump,and maybe a screen?
the free flow of air through the filter has me guessing it ok. so time to move toward the ass-end of the car..
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neutronscott
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Sep 18, 2011, 11:21 AM
Post #9 of 9
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Re: 94 toyota paseo - fuel delivery
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i couldn't get the supply line off the fuel pump. i give up. in 12 days i'm leaving for 6 months anyway. meh.
thanks for the help.
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