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1997 Tacoma 2.7 Won’t start

Discussion in '1st Gen. Tacomas (1995-2004)' started by Gordo88, Dec 11, 2021.

  1. Dec 11, 2021 at 7:29 AM
    #1
    Gordo88

    Gordo88 [OP] Member

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    I have a 1997 Toyota Tacoma 2.7 that will not start unless you spray fuel into the intake with a squirt bottle. It has 40-43 psi on the fuel rail while turning over and seems to be firing good. I have replaced the spark plugs, fuel injectors and the fuel pressure regulator. I verified 12v+ on all four injectors and can see the negative signal from the ecm telling injector to spray but it seems weak. I tried to test the three wire crank shaft sensor assuming one is ground one is 12v and the third sends a reduced voltage back to the ecm but I can not see voltage on the plug. I have seen several people with the same issues online but no post if the issue was ever found. Any assistance is appreciated.
     
  2. Dec 11, 2021 at 9:29 AM
    #2
    USMILRET

    USMILRET Tacoma Owner

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    Check the dash light for codes. the ECU is quick to throw one if something is disconnected. ECT sensor can cause a no start. IAT sensor as well. Check all electrical connections.
     
  3. Dec 11, 2021 at 9:37 AM
    #3
    Sonofliberty92

    Sonofliberty92 Well-Known Member

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    Almost sounds like a fuel pump. Does it stay started once you get it started?
     
  4. Dec 11, 2021 at 9:38 AM
    #4
    USMILRET

    USMILRET Tacoma Owner

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    The reason why you cannot see voltage at the plug is because the computer will not allow the plugs to fire. So why?
     
  5. Dec 11, 2021 at 9:54 AM
    #5
    Gordo88

    Gordo88 [OP] Member

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    I have checked the connections and all seem to be good. I’m currently trying to get the codes off the dash by jumpering e1 and te1 on the diagnostic port with no luck. The videos I found on YouTube are for 1995 for this process so is it different for the 1997? Thanks for help!
     
  6. Dec 11, 2021 at 9:56 AM
    #6
    USMILRET

    USMILRET Tacoma Owner

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    Get a cheap reader and plug it into the diagnostic port or go to an autozone and they will read the codes for you.
     
  7. Dec 11, 2021 at 9:57 AM
    #7
    Gordo88

    Gordo88 [OP] Member

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    To the fuel pump question it does not stay running and the fuel pressure remains 40-43 psi on the fuel rail.
     
  8. Dec 11, 2021 at 9:58 AM
    #8
    Gordo88

    Gordo88 [OP] Member

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    Ok I checked at my local auto parts store and they do not have a obd1 reader so I will order one offline.
     
  9. Dec 11, 2021 at 10:02 AM
    #9
    USMILRET

    USMILRET Tacoma Owner

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    OBD II reader not OBD I
     
  10. Dec 11, 2021 at 10:07 AM
    #10
    Gordo88

    Gordo88 [OP] Member

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    I have a cheap obd2 reader but this vehicle is equipped with a obd1 diagnostic port.
     
  11. Dec 11, 2021 at 10:13 AM
    #11
    Black DOG Lila

    Black DOG Lila Well-Known Member

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    Stock. EZ pass.Dump pass.Inspection sticker.Convict printed lic.plates.FG cap.
    Have you looked under the dashboard to the right of steering wheel ?
     
  12. Dec 11, 2021 at 10:18 AM
    #12
    Gordo88

    Gordo88 [OP] Member

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    My apologies! As soon as I seen the port under the hood I assumed that was the only one on the truck. Will pull the codes now.
     
  13. Dec 11, 2021 at 10:53 AM
    #13
    Gordo88

    Gordo88 [OP] Member

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    The only code is a po115 engine coolant temperature sensor. The battery was dead yesterday and the truck has been on a charger since this morning so it possibly erased the codes?.
     
  14. Dec 11, 2021 at 11:28 AM
    #14
    USMILRET

    USMILRET Tacoma Owner

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    Sometimes the engine coolant temp sensor gets damaged at the firewall. Check for a good connection and serviceability of the ECT.
    Yes a dead battery can get codes erased.
     
  15. Dec 11, 2021 at 5:13 PM
    #15
    Gordo88

    Gordo88 [OP] Member

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    The coolant sensor was unplugged! Truck fired right up but is very sluggish like it’s starving for fuel. Will drive it more tomorrow to see if it will trigger a different code. Thanks for the help so far!
     

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