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ECU reporting wrong temp, No closed loop
#33
Finally, got the conclusion :
GM cartridges show lower than real CW temp ( 66 deg C / 151 F) whatever Tech1 or Mastertech is used ; this happens with 2 different ECMs ( original one is California 2 doors 33920-59B3 E2T42991 T 4129 A3 US-3AT and the spare is 2 doors Fed 33920-70EB 0 E2T42991 M1 4290C A6 US-3AT)
Suzuki and Asian Imports cartridges show the real CW temp ( 83 degC / 181 F)
All these, with the old ECT installed. Afterwards I have received and installed the Standard Motors TX40T ECT sensor, anyhow.
So, the Tech 1 is OK, it was quite costly to get a Mastertech just to can prove this.
I have subscribed to AllData for both 95 Geo Tracker and for 95 Sidekick and I went through the TSBs, found the ones related to ECMs and Tech 1.
Now that I know all these, I wonder which ECM to leave on the car ? It has came with the California installed and I have bought a Fed afterwards as for spare ( their data, above )
Thanks a lot !
95 Geo Tracker 2 doors hard top 3speed A/T 16V 1.6l Fed 4x4
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RE: ECU reporting wrong temp, No closed loop - by luigi daniel - 05-28-2015, 06:13 PM

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