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Hard to start 2001 4.7 engine

Discussion in '1st Gen Tundras (2000-2006)' started by Gray Hunter, Apr 7, 2021 at 4:47 PM.

  1. Apr 7, 2021 at 4:47 PM
    #1
    Gray Hunter

    Gray Hunter [OP] New Member

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    If outside temperature is above 75 degrees, engine will turn over but not crank. Cleaned throttle body, map sensor. Checked cam sensor and replaced engine coolant sensor. When it does start it will sometimes puff out black smoke from tail pipe. Does this sound like ECU problem? This is direction about to go down, plugs wires, fuel rail pressure is good. I know this sounds like a weird issue. Thanks in advance for any advice with this.
     
    YardBird likes this.
  2. Apr 7, 2021 at 5:07 PM
    #2
    KNABORES

    KNABORES Not so new-ish Member

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    Bilstein 5100's 16x8 589's with 265/75/16 and 1.25" spacers Flowmaster 50 series over the axle dump Westin bull bar with 20" LED Pioneer touchscreen with backup camera Full interior and dash LED conversion Trailer brake controller with 7 pin Bedliner coat bumpers trim and tool box
    Black smoke would be fuel? How many miles? how are the injectors?
     
    YardBird likes this.
  3. Apr 7, 2021 at 5:11 PM
    #3
    YardBird

    YardBird Native San Diegan

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  4. Apr 7, 2021 at 5:13 PM
    #4
    MS22

    MS22 New Member

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    Bad or low batteries can cause some wonky symptoms.
     
  5. Apr 7, 2021 at 5:23 PM
    #5
    Gray Hunter

    Gray Hunter [OP] New Member

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    The battery is new. Thank you for the welcome! Truck has about 277,000 miles on it now, I got it with 155,000. I had all service done, fluids, timing belt, tune up, rebuilt trans and replaced rear end. I do not think anything has been done to injectors.
     
  6. Apr 8, 2021 at 4:37 AM
    #6
    Professional Hand Model

    Professional Hand Model A.K.A ‘Golden Hands’

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    We had a member with about 160k miles on his 4.7L do a professional test and cleaning of his injectors. 6 out of 8 were dripping out of Spec.

    I’ve installed Reman’d 12Port Injectors on mine. Highly recco if thats your problem.
     
  7. Apr 8, 2021 at 5:37 AM
    #7
    SouthPaw

    SouthPaw The headlight guy

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    When’s the lag time the fuel filter was changed?
     
  8. Apr 8, 2021 at 12:37 PM
    #8
    Gray Hunter

    Gray Hunter [OP] New Member

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    Thanks for the feed back on this issue. Fuel filter is less than 6 months old. We are going to pull the fuel rails and see if the injectors are leaking. Ready to find the cure for this issue, running out of things to check and replace. The truck is sound and runs great except for this issue.
     
  9. Apr 12, 2021 at 8:36 AM
    #9
    peanut

    peanut making uneconomical choices about my truck

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    Did you check for vacuum leaks everywhere?
     

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