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Hard starting

Discussion in '1st Gen. Tacomas (1995-2004)' started by SpeedoJosh, Aug 5, 2013.

  1. Aug 5, 2013 at 10:28 PM
    #1
    SpeedoJosh

    SpeedoJosh [OP] Well-Known Member

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    So I've been having a hard start issue with the taco. First start in the morning it fires right up in a second. Could turn it off , and it'll fire right back up. But, if I drive around for a little bit, park, then come back later it takes a little bit for it to fire. Turns and turns, then usually has a weak, stumble start. Drives fine once started, just hesitant to start.
    Any ideas?

    98 Tacoma. 2.7 manual.
     
  2. Aug 6, 2013 at 10:01 AM
    #2
    skytower

    skytower Well-Known Member

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    Hitch and wiring, aux back-up light, rear strobe lights, radio and underseat sub.
    Use some Seafoam. How old are the plugs, and wires(insulators for coil-on-plug)? Check the temp sensors for proper operation. They should change fluidly from cold to hot. If they are reading incorrectly, but still within range, they will not throw a code. It would make for hard starts and bad fuel mileage.
     
  3. Aug 6, 2013 at 10:46 AM
    #3
    SpeedoJosh

    SpeedoJosh [OP] Well-Known Member

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    Plugs and wires are new within the last 5k or so.

    Seafoam the tank, or seafoam the engine?
     
  4. Aug 6, 2013 at 12:42 PM
    #4
    se7enine

    se7enine MCMLXXIX

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    Clean the MAF, that tends to help others w/ similar problems. I took off a hose on my Charcoal canister once and it was hard to start because all the pressure was released, maybe you have a pressure leak.
     
  5. Aug 6, 2013 at 4:08 PM
    #5
    TacomaJPP

    TacomaJPP To secure peace, is to prepare for war

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    I agree with these guys in this order:

    1) Seafoam (cheap and easy)
    2) MAF Cleaner (cheap and easy)
    3) Temp sensors.

    I had a temp sensor go bad in my beater-1986-Accord and it would start on the first crank, but if the car got warm, it wouldn't restart for hours. My sensor failed in such a way that the sensor was saying the engine was cold, which was true on the initial crank. On a hot restart, the sensor was still saying it was cold and was flooding the engine.
     
  6. Aug 6, 2013 at 7:41 PM
    #6
    SpeedoJosh

    SpeedoJosh [OP] Well-Known Member

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    Right on. I know the MAF is clean. Cleaned it last oil change.

    For the sea foam, is that just the normal bottle in tank, or are you guys meaning adding it to the engine?

    Temp sensor, I'll have to bust out the haynes for that. Hard swap, or pretty quick?
     
  7. Aug 6, 2013 at 8:15 PM
    #7
    TacomaJPP

    TacomaJPP To secure peace, is to prepare for war

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    Seafoam should be used by sucking some in through a vacuum line into the intake (1/3 of a bottle is what I believe the instructions say) and the rest into the tank.

    Temp sensor is easy. I haven't checked on the actual locations on our trucks. I will check tomorrow. Basically, unplug electrical connector and screw it out. Nothing to it.
     
  8. Aug 7, 2013 at 11:35 PM
    #8
    Loggerhead

    Loggerhead Well-Known Member

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    If none of the above, perhaps it could be the fuel pump dying out ?
     
  9. Aug 8, 2013 at 8:27 AM
    #9
    tan4x4

    tan4x4 Well-Known Member

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    On my '99 3RZ, from what I've read, the air intake temp sensor is built in to the MAF sensor.
    And there are 2 coolant sensors. The one for the ECM is at the back (bitch to get at), and the one for the gauge is where the upper rad hose attaches to the block.
     
    Last edited: Aug 8, 2013
  10. Aug 8, 2013 at 8:38 AM
    #10
    SpeedoJosh

    SpeedoJosh [OP] Well-Known Member

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    I feared that, but wonder why it works without issue first crank, then acts up when warm.
     
  11. Aug 9, 2013 at 10:00 PM
    #11
    Bahamayellow

    Bahamayellow Well-Known Member

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    Hello mine has the same problem from time to time. Starts fine like it should most of the time then stumbles like an old car, but still starts. Lol I have a 2002 tacoma and its been doing it for 8 to 9 years now. It's a 3.4 with 100k miles. I use bg44k and that seems to help. Mine just happens once in awhile and hasn't thrown any codes so far.
     

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