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2005 AC won't start - fuel system problem?

Discussion in '1st Gen Tundras (2000-2006)' started by drapp, Sep 21, 2022 at 1:29 PM.

  1. Sep 21, 2022 at 1:29 PM
    #1
    drapp

    drapp [OP] New Member

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    I have a 2005 AC. It's been parked up a mountain for a few months while I was distracted with other things.

    Symptoms:
    - Won't start. Battery is good, engine cranks, no start.
    - Gas tank shows empty even though it has fuel in it (and I added more to be sure).
    - P0441 - EVAP System incorrect purge flow
    - P0452 - Evaporative Emission Control System Pressure Sensor / Switch Low Input
    - P0455 - Evaporative Emission Control System Leak Detected (Gross Leak)

    I'll bet $100 that the underlying issue is that mice chewed wires .... I've had that problem once before. If it matters, it's also parked on a bit of a slope, front end uphill.

    Bluedriver suggests replacing the vapor canister purge solenoid and vapor canister purge valve assembly. But what about the fuel tank showing empty?

    I'm 2 miles up a steep gravel road and a long way from a tow truck. Any suggestions on wiring to examine or parts to try replacing? Diagrams to help me find my way?

    Thanks.
     
  2. Sep 21, 2022 at 2:28 PM
    #2
    shifty`

    shifty` Push the envelope. Watch it bend.

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    Why bother with what Bluedriver says? They're having you treat the codes, but that won't help you get the truck starting, it'll just help with emissions and possibly smooth idling, eh?

    I think you probably pinpointed your problem: Mice. But don't just suspect chewed wires, they like to chew the plastic lines coming off the fuel tank, under the bed and cab also, it's not just the wires.

    No fuel signal = likely chew-through of the sender wire. If you have a way to check for fuel pressure while cranking that would be helpful.


    Here's a good video on fuel diagnostics:


    Another great video on starting diagnostics, maybe not as applicable:

     
    Aerindel likes this.
  3. Sep 21, 2022 at 6:30 PM
    #3
    shifty`

    shifty` Push the envelope. Watch it bend.

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  4. Sep 21, 2022 at 6:51 PM
    #4
    drapp

    drapp [OP] New Member

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    Thank you. I will take a look this weekend and report back.
     
  5. Sep 21, 2022 at 7:17 PM
    #5
    Jack McCarthy

    Jack McCarthy Navigating the luminiferous ether to see the light

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    AAA+ might be helpful to have. 4 tows/year up to 100 miles max anywhere.
     
  6. Sep 22, 2022 at 7:43 AM
    #6
    shifty`

    shifty` Push the envelope. Watch it bend.

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    @drapp this document may also help with regards to how the fuel system works. But it doesn't cover chewed wires, unless rodents also chewed up your crankshaft position sensor wiring. Given the gas needle stopped working, it makes more sense that they chewed something on/around the pump, or between the cab and pump.
     
  7. Sep 24, 2022 at 12:07 PM
    #7
    drapp

    drapp [OP] New Member

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    Well. It’s good-news bad-news.

    good news: not a complicated diagnosis.
    Bad news: the mice chewed A LOT down there.

    photo attached, looking in on top of the gas tank from the drivers side.

    Am I right to think that I have to drop the tank to get at the damaged wiring and sort it out? If so I think that’s going to be beyond me.

    Thanks again for your advice and help.

    415814E6-AE51-439A-BB49-244E8ECE76BC.jpg
     
    w666 likes this.
  8. Sep 24, 2022 at 12:13 PM
    #8
    drapp

    drapp [OP] New Member

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    Whoops. Looks like they got a vent line as well. See this photo. Ugh.

    i think I’m looking into a tow truck at this point.

    B9F3DF0B-126F-4FD8-8CFA-608BDCC17C35.jpg
     
    w666 likes this.
  9. Sep 25, 2022 at 12:28 PM
    #9
    drapp

    drapp [OP] New Member

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    Or maybe lifting up the bed would give me enough room to work on it? Less work than dropping the tank?
     
    w666 likes this.
  10. Sep 25, 2022 at 6:00 PM
    #10
    w666

    w666 D. None of the above

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    None yet
    It's pretty easy to drop the tank...especially if you don't have to be careful of the wires :)
     
    Aerindel likes this.
  11. Sep 25, 2022 at 8:42 PM
    #11
    Aerindel

    Aerindel New Member

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    DO NOT REMOVE THE BED.

    It's a waste of time on access cab, the fuel tank port is under the cab, not the bed. Not to mention, there area lot more bolts and wires to removing the bed, than dropping the tank.

    It's not hard. I had to do it last winter, in the snow, which sucked because of the snow, but was not difficult until I broke a bolt. If the bolts that hold the tank straps are not seized, its a simple job, even by yourself, with a helper, it would be MUCH easier.

    The trick is, to make sure the bolts turn, before you drop the tank. Its easy to knock out the strap pins with the bolts tight and drop the tank, but to put it back in, you have to be able to unscrew those bolts because they are what tensions the straps and hold the tank in.
     
  12. Sep 26, 2022 at 6:18 AM
    #12
    shifty`

    shifty` Push the envelope. Watch it bend.

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    Start hitting any related bolts now with PB Blaster, Kroil, your your preferred similar penetrating oil.

    Dropping the tank is probably easiest. Complete the wiring work, and replacing any needed parts. then wrap the bejesus out of it with something that rodents won't eat, or will kill them if they do.

    This has to be the worst I've seen yet :D Good thing they hit the tank sender wire, else the diagnosis wouldn't have been so easy :D
     

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