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  1. #1
    Join Date
    Feb 2009
    Location
    Huntsville, AL
    Posts
    495

    replaced cold start injector and still having problems

    I replaced my cold start injector yesterday and i thought i finally fixed the hard starting problem but today i tried turning my supra on and it still took me 3 or 4 tries. What else can be causing this problem?
    RIP Tad Mattle
    1984 White MKII P-Type, 2jzge soon to be na-t ct15b turbo too many custom mods
    1985 Black P-type Cheappower's old car rebuilt 5mge

    ToyFab - Welding specialties

  2. #2
    Join Date
    Apr 2007
    Location
    Port Orchard,Wa
    Posts
    2,212
    Cold start time switch or
    Your STA wire is not hooked up. (from the starter to the ECU)
    This tell the cold start to open when the coolant temp is low.

  3. #3
    Join Date
    Feb 2009
    Location
    Huntsville, AL
    Posts
    495
    what does the sta wire look like? pictures would be nice
    RIP Tad Mattle
    1984 White MKII P-Type, 2jzge soon to be na-t ct15b turbo too many custom mods
    1985 Black P-type Cheappower's old car rebuilt 5mge

    ToyFab - Welding specialties

  4. #4
    Join Date
    Mar 2003
    Location
    Greenville, SC
    Posts
    12,017
    do you know the CSI is not firing? Test light time.

    --billyM
    Blue 82 L - Black 83 P - White 83 P - Brown 84 T - White 85 P - Blue 85 GTS
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  5. #5
    Join Date
    Apr 2007
    Location
    Port Orchard,Wa
    Posts
    2,212
    The black wire on a auto or black/white on 5 speeds that is on the CSI and goes to the ECU, Starter after the IGN switch. If the CSI temp sensor is not working it is either grounded (injector always open)or open(injector never opens when cold).
    http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=49

  6. #6
    Join Date
    Oct 2003
    Location
    Haddon Twp NJ
    Posts
    155
    what exactly is the car doing? does it stall at first? If it is warm will the car start right up? I had this problem and did the same thing you did and spent way to much on a cold start injector and realized that didn't fix my problem. Next I did what I found to be called a thermo sensor switch it was located in the thermostat housing. It wasn't easy to find the part but my local auto parts store found it from a company called Airtex they make engine management components they are located in like Iowa any other questions just pm me
    1985 Red
    no mods as of yet need to restore the savings
    Need a turbo

  7. #7
    Join Date
    Jan 2006
    Location
    Eastern, Wa
    Posts
    1,471
    Your temp switch is the brown plug on thermostat housing. Check this. The green one sits next to it.
    Garrette 85 P-Type
    Stock...Define Stock


    Quote Originally Posted by IDreamOfSupra View Post
    your distributor won't even know you're running boost

  8. #8
    Join Date
    Feb 2009
    Location
    Huntsville, AL
    Posts
    495
    i replaced it and it still has trouble starting up...
    RIP Tad Mattle
    1984 White MKII P-Type, 2jzge soon to be na-t ct15b turbo too many custom mods
    1985 Black P-type Cheappower's old car rebuilt 5mge

    ToyFab - Welding specialties

  9. #9
    Join Date
    May 2003
    Location
    San Diego, CA
    Posts
    3,833
    You want to look at the EFI temp sensor.

    The larger 2 wire sensor on the thermostat housing is the cold start time switch.

    TSRM Link : http://www.cygnusx1.net/Supra/Librar...aspx?S=FI&P=72

    The smaller 2 wire sensor, is the EFI temperature sensor. That tells the computer that it is cold outside. Most hard start situations are related to this sensor.

    Chances are the sensor is broken, a common problem. However, many times, it is the harness itself. The wires break right where they bend and enter the connector.

    If you need a replacement sensor and/or harness connector, let me know.

  10. #10
    Join Date
    Feb 2009
    Location
    Huntsville, AL
    Posts
    495
    yeah i just replaced that sensor. how could i clean the harness connector? I'm also getting pretty bad gas mileage. does this have anything to do with it?
    RIP Tad Mattle
    1984 White MKII P-Type, 2jzge soon to be na-t ct15b turbo too many custom mods
    1985 Black P-type Cheappower's old car rebuilt 5mge

    ToyFab - Welding specialties

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