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Thread: Transmission Temperature ECU Input

  1. #81
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    Quote Originally Posted by Danny Cabral View Post
    There's nothing wrong with the Auto Meter 2259 temperature sensor. I've been using it for four years now, and it always works perfectly.
    I wasn't saying there's anything wrong with using an Auto Meter 2259 sensor. I was just suggesting using one that has a known drop down menu table, to eliminate the possibility of programming it incorrectly.
    -Scott
    Don't forget to check out progress on my Race Car:
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    Low 8 Second Street Car

  2. #82
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    Quote Originally Posted by S2H View Post
    I wasn't saying there's anything wrong with using an Auto Meter 2259 sensor.
    I knew what you meant...no problem at all.

    I was just suggesting using one that has a known drop down menu table, to eliminate the possibility of programming it incorrectly.
    Good point. But I worked hard writing post #1, and it's easy to use such a compact 1-wire sensor with 1/8-27 NPT threads.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  3. #83

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    Quote Originally Posted by Danny Cabral View Post
    Those of you with the Holley Avenger, HP or Dominator EFI system may be interested in this. I added a transmission temperature sensor Input to my ECU. A coolant temperature sensor is too big & bulky, and 3/8-18 NPT threads are too coarse for sealing in thin wall aluminum castings. So I contacted Auto Meter's Tech Department and had a nice discussion about what I was doing. He recommended their #2259 temperature sending unit (1/8-27 NPT) because it's very compact and will fit in shallow depth ports. He said it's their newer model sending unit (for coolant/cylinder head temperature, transmission fluid, engine oil, gear oil, etc.) and more accurate than their older ones. It's also self-grounding, so it's an easy one wire hookup. Best of all, it's only $13. I installed it in my transmission's main line pressure test port. No gauge required because I'm monitoring it on the ECU Data Monitor, Datalogger, TSLCD/Digital Dash. It works very well and I'm happy with the easy installation. Here's the 16 thermistor calibration data points I acquired to enter into our ECU "Custom Thermistor" Input.
    Danny, thanks again for all the great insight & information.
    I currently have the Auto Meter 2252 sensor installed on my transmission pan. How would I wire it? Should I ground one side and other as thermistor input? Your help is appreciated.
    Cobracars.

  4. #84
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    Quote Originally Posted by cobracars View Post
    How would I wire it? Should I ground one side and other as thermistor input?
    Yes, one wire is ground and the other is the Input signal.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  5. #85

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    Quote Originally Posted by Sponge View Post
    Voila, it is corrected. Any wrong inputs for the VSS sensor? I'll test the wiring next week.
    I found my problem, I was using the same sensor for the Holley EFI and the Auto Meter gauge. I then added a second sensor and no more problem.

  6. #86

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    I'm going to use this as a fuel temp sensor, but have a question: Is the procedure you laid out in the first post the same in V4? Thanks!

  7. #87
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    Quote Originally Posted by AdvAutoBob View Post
    Is the procedure you laid out in the first post the same in V4?
    Yes, same custom Input procedure.
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  8. #88

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    Quote Originally Posted by Danny Cabral View Post
    Yes, one wire is ground and the other is the Input signal.
    Danny, I'm trying to configure an Auto Meter 2252 Temp sensor. This is what I did. Picked 32 points and selected every other value. Hope this works. I will confirm next week once I finish the wiring.

    Click image for larger version. 

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  9. #89
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    Quote Originally Posted by cobracars View Post
    Danny, this is what I did. Picked 32 points and selected every other value.
    Select a 31 data point field, not 32. 32 would leave one off the scale.
    16 cell values + an additional value in between each pair of cells = 31.
    Also, you made Ohms errors at the 158F & 140F columns (post #1).
    The scale should be configured from 302F (189Ω) to 32F (37499Ω).
    The temperature scale is linear, but the Ohms resistance scale is not.

    Auto Meter 2252 (Delphi 12160855) Thermistor Specifications
    Temperature = Ohms (Holley EFI 16 Cell Calibration Table):
    32F = 37499Ω (Right)
    50F = 22572Ω
    68F = 14007Ω
    86F = 8935Ω
    104F = 5844Ω
    122F = 3911Ω
    140F = 2676Ω
    158F = 1870Ω
    176F = 1331Ω
    194F = 965Ω
    212F = 710Ω
    230F = 531Ω
    248F = 403Ω
    266F = 309Ω
    284F = 241Ω
    302F = 189Ω (Left)
    May God's grace bless you in the Lord Jesus Christ.
    '92 Ford Mustang GT: 385" SBF, Dart SHP 8.2 block, TFS TW 11R 205 heads, 11.8:1 comp, TFS R-Series intake, Dominator MPFI & DIS, 36-1 crank trigger/1x cam sync, 160A 3G alternator, Optima Red battery, A/C, 100HP progressive dry direct-port NOS, Spal dual 12" fans/3-core Frostbite aluminum radiator, Pypes dual 2.5" exhaust/off-road X-pipe/shorty headers, S&W subframe connectors, LenTech Strip Terminator wide-ratio AOD/2800 RPM converter, M4602G aluminum driveshaft, FRPP 3.31 gears, Cobra Trac-Lok differential, Moser 31 spline axles, '04 Cobra 4-disc brakes, '93 Cobra booster & M/C, 5-lug Bullitt wheels & 245/45R17 tires.

  10. #90

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    Danny, thanks for your help. I've updated the calibration table accordingly.

    Click image for larger version. 

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