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    Quick Links: Lef wiring harness. Help please!!! Front Struts on a 2003 DC PreRunner Missing tire change tools... Negative Battery Terminal Denso 234-9001 Bank1 O2 sensor question 1st gen Tacoma rear shock help

weird problem going uphill

Discussion in '1st Gen. Tacomas (1995-2004)' started by rinkeswa, Aug 11, 2025 at 4:48 PM.

  1. Aug 11, 2025 at 4:48 PM
    #1
    rinkeswa

    #1
    rinkeswa [OP] New Member

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    my 2.4 starts and runs great in almost all respects, but in the last few months I've developed an odd problem. I live at 2450ft elevation but spend time at 500ft elevation. I travel on a paved 4 lane highway. The engine runs fine at both locations and downhill. Only when travelling uphill from 500 ft to home, the engine dies a few minutes/miles after I top out on a steep grade at about 2000rpm without warning. Shifting and throttle response were normal. The engine starts and runs normally afterwards. The only code is p0442 and that only occurs intermittently. Any ideas??
     
    Last edited: Aug 11, 2025 at 5:40 PM
    rinkeswa, Aug 11, 2025 at 4:48 PM
    #1
  2. Aug 11, 2025 at 5:27 PM
    #2
    TnShooter

    #2
    TnShooter The TacomaWorld Stray

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    P0224 isn't in the service manual for a 2004 Tacoma.
    But that code typically comes back as a Throttle Position Sensor
    About all you can do, physically is ohms tests.

    upload_2025-8-11_20-27-4.png
     
    TnShooter, Aug 11, 2025 at 5:27 PM
    #2
  3. Aug 11, 2025 at 5:39 PM
    #3
    rinkeswa

    #3
    rinkeswa [OP] New Member

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    sorry for the obd error typo - it's been a long day thanks for the quick response
     
    rinkeswa, Aug 11, 2025 at 5:39 PM
    #3
    TnShooter likes this.
  4. Aug 11, 2025 at 5:44 PM
    #4
    TnShooter

    #4
    TnShooter The TacomaWorld Stray

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    Is your truck an Automatic or Manual?
     
    TnShooter, Aug 11, 2025 at 5:44 PM
    #4
  5. Aug 11, 2025 at 5:56 PM
    #5
    ControlCar

    #5
    ControlCar My Moto: Help & Learn…period.

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    Rinkeswa

    does your CE stay on or(like my 2rz auto)
    Goes on for 2secs then off…..repeats several times during course of short drive
    When CE lite on taco bogs for a few secs then returns to normal
    Never could read a code….none stored either
     
    ControlCar, Aug 11, 2025 at 5:56 PM
    #5
  6. Aug 11, 2025 at 8:08 PM
    #6
    rinkeswa

    #6
    rinkeswa [OP] New Member

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    truck is an automatic 2wd no apparent tranny problems, always been good. Once set, CE stays on until cleared, and it is not always lit when the truck dies but I still read the error on the OBD scanner
     
    rinkeswa, Aug 11, 2025 at 8:08 PM
    #6
    ControlCar likes this.
  7. Aug 13, 2025 at 5:21 PM
    #7
    rinkeswa

    #7
    rinkeswa [OP] New Member

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    quick update - starts and runs on propane, so definitely a fuel issue. Changed fuel filter - no help but I did invent some new words. Next is MAF and fuel Pressure /regulator FPR.

    I did not find any easy way to add a fuel pressure gauge for troubleshooting - it looks like solid metal tubing from tank to rear of fuel rail where it ends in a single banjo. Has anybody tried to add a double banjo so you could monitor fuel pressure in real time via gauge?? Anybody know what size M x thread that banjo is??
     
    Last edited: Aug 13, 2025 at 8:10 PM
    rinkeswa, Aug 13, 2025 at 5:21 PM
    #7
    wilcam47 likes this.
  8. Aug 13, 2025 at 9:04 PM
    #8
    O'Silver_Taco

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    O'Silver_Taco Well-Known Member

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    3rz to 2Rz bebuilt block and new heads
    I believe this takes 1/8" gauge

    $17 RUSSELL/EDEL 640700 Fuel Pressure Take Off Banjo Belt
    Amazon.com: RUSSELL/EDEL 640700 Fuel Pressure Take Off Banjo Belt : Automotive
    $12 MEASUREMAN 1-1/2" Dial Size Black Dial, Glycerin Filled Fuel Pressure Gauge, 304 Stainless Steel case, 0-60Psi, -3-2-3%, 1/8" NPT Lower Mount
    Amazon.com: MEASUREMAN Fuel Pressure Gauge 0-60psi 1.5" Dial, 1/8" NPT Back, Stainless Steel Case, Brass Inside, Glycerin Filled, Black Dial : Industrial & Scientific
    $12 MEASUREMAN Fuel Pressure Gauge 0-60psi 1.5" Dial, 1/8" NPT Back, Stainless Steel Case, Brass Inside, Glycerin Filled, Black Dial
    Amazon.com: MEASUREMAN 1-1/2" Dial Size Black Dial, Glycerin Filled Fuel Pressure Gauge, 304 Stainless Steel case, 0-60Psi, -3-2-3%, 1/8" NPT Lower Mount : Industrial & Scientific
     
    O'Silver_Taco, Aug 13, 2025 at 9:04 PM
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