What part numbers should I use when purchasing temperature sensors for MS?

For the most part, MegaSquirt can utilize all stock sensors. MegaSquirt ECU's with MS-II processors can interface with all stock sensors after a few calibration steps. MegaSquirt ECU's with MS-I processors can theoretically interface with all stock sensors too. In practice, however, the calibration steps for using non-standard IAT/CLT with an MS-I based ECU involve antiquated and difficult to use software. We recommend either using standard GM IAT and CLT sensors for use with all MS-I based ECU's.

You can purchase IAT and CLT sensors direct from SymTech Labs:

Conversely, you may be able to find these standard sensors from a local parts store, or a junkyard. See the tables below for part numbers and applications:

Known Applications Years
All GM (Chevrolet, Pontiac, Cadillac, GMC, etc.) 81-96
Honda Truck 94-96
Isuzu Truck 92-96
Jeep 82-87

Manufacturer Coolant Temperature Sensor (CLT) Intake Air Temperature Sensor (IAT)
GM 12146312/15326386 25036751
Standard TX3 AX1
GP Sorensen TSU81 779-19001
AC Delco 213-928 213-190
Niehoff DR134AK TS83631/DR-136W
Wells SU109 (includes connector) SU107
MSD 2310 (includes connector) 2320 (includes connector)

Supplier Coolant Temperature Sensor (CLT) Intake Air Temperature Sensor (IAT)
Wells 254 235
Niehoff PS77421
Conductite/Dorman 85100 85110
AutoZone 047131

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megasquirt/sensors.txt · Last modified: 2012/11/30 07:12 (external edit)
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