Fuel Delivery Problem

1996 TOYOTA AVALON
171,000 MILES • 3.0L • 6 CYL • FWD • AUTOMATIC
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CHEVYMAN47
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I car was running fine one day gas gauge stop working. I went to my local repair shop and they said it was the sending unit In the tank. The cost of repair is around $300.00 Dollars. I decided to replace it myself. A very simple process. I purchased a new sending unit and removed my old fuel pump and installed It on the new sending unit and replaced it. now I turn the ignition on and I can hear the pump run so I proceed to start the car and it starts, but it only runs for two or three seconds and then it dies. I checked all the fuses and relays all were good, I disconnected the positive cable to reset the alarm I still have the same problem. What else could It BE? Remember The car ran fine before repair. Ignition switch maybe? Thanks Tom.
Jun 6, 2016 at 1:52 PM
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CJ MEDEVAC
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Maybe you kinked a fuel line?

The Medic
Jun 6, 2016 at 5:38 PM
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CHEVYMAN47
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all Fuel Lines Are Perfect!!!
Jun 7, 2016 at 12:22 AM
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CJ MEDEVAC
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Check engine light on?

The Medic
Jun 7, 2016 at 9:07 PM
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CHEVYMAN47
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NO! Check Engine Light!!
Jun 7, 2016 at 9:53 PM
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CJ MEDEVAC
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Check fuel pressure, auto store may rent you a gauge

Ever change Mr. Fuel Filter?

Runs after the cranking for 3 seconds OR it only runs during the cranking?

Do this outside away from things you like and always have a fire extinguisher near by when you work on your rig. Can you make it run longer with a squirt, here and there of starter fluid (Not overboard soaking, just enough to nurse it to run/ cough/ spit/ sputter for a longer time period) Kinda to let us know whether it needs fuel or maybe spark (ignition) is getting lost after your 3 seconds

The fuel pressure would be a nice thing to know, before and during it running

The Medic
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Jun 8, 2016 at 4:12 PM
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CHEVYMAN47
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Runs While Cranking!! Fuel Filter Changed!! And I'll Try The Spray and Run and Get Fuel Pressure Checked!! Details To Follow>>> Thanks Tom.
Jun 8, 2016 at 9:00 PM
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CHEVYMAN47
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New Update !!! Today Removed And Replaced Fuel Pump Relay In Passenger Side Kick Panel And Started Car!!! it Ran For At least 60 Seconds Before Dying!!!! Left The Ignition In The On Position For About 5 Minutes And Did A Restart And Again Engine Ran For 60 Seconds Or More!!! Fuel Pressure? Bad Fuel Pump?? Clogged Fuel Supply Line??? I'am Stumped??? Your Turn :)
Jun 9, 2016 at 7:40 PM
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CJ MEDEVAC
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I'd say the next thing to do is check the fuel pressure (with a gauge)

Can't drive very far in 60 seconds!

The Medic
Jun 9, 2016 at 7:44 PM
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CHEVYMAN47
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OK But What Does Low Fuel Pressure Mean? Bad Pump? OR ?
Jun 10, 2016 at 12:15 PM
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CHEVYMAN47
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Today I Fiddled With it Again and When It Started I kept Pumping The Gas Pedal And It Ran @ High RPM's And Slowly Backed Off Gas Still Running then Died??? Your Thoughts On This??? Thanks Tom.
Jun 10, 2016 at 5:20 PM
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STRAILER
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It sounds like something got messed up with the wiring at the tank. Does the gauge work now?
Jun 11, 2016 at 12:27 PM
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JACOBANDNICKOLAS
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Tom, have you confirmed that the fuel pressure is within the manufacturer's specs? It sounds like you get pressure to start it, but then it's lost. As was mentioned, it could be a clogged line, bad connection at the wiring... Also, make sure you didn't switch the return and supply lines.
Jul 4, 2016 at 8:48 PM