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Old 04-15-2008, 06:38 AM #1
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Fuel Pump Problem?
Any suggestions on how I can tell I have a bad fuel pump, without just changing it?

I pulled the cold start injector, and jump the diagnostic port, I get nothing.

I checked the fuses. Could it be a bad ECU? Or Relay?

HELP!!!!

1989 V6

thank you!
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Old 04-15-2008, 06:52 AM #2
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what leads you to think you have a fuel pump issue?
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Old 04-15-2008, 07:40 AM #3
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I pulled the cold start injector, and jump the fule pump on the diag. port.

No fuel.

the truck won't start.

I can get it to sputter if I use starting fluid, so I assume it is not spark.

Is there a common problem with the 3.0 that would keep it from starting?
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Old 04-15-2008, 08:14 AM #4
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Well, you could run 12V directly to the pump, put your ear to the tank, and listen for the hum.
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Old 04-15-2008, 02:00 PM #5
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FYI - I had some rust around the windshield, apparently leaking H2O into the cab, it got on the EFI relay under the dash and rusted it out.

$35 later from NAPA, and the truck fired right up!!!!

thanks everyone (and Toyota's factory service manual) for your help!

Vinny
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