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Old 08-26-2006, 06:11 PM   #1
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Default stock CLT, easytherm

I installed my MS splicing into the stock coolant temp circuit in my '90 and it seems to be working nicely. I have not yet unhooked anything from the oem computer, so the sensor is shared for the time being.

I thought splicing in might affect the signal to the stock ecu and the temp gauge I have wired in, but the gauge indicates the same temps as before for the thermostat opening 180F and the fan coming on 212F (both of which are controlled independently of the oem coolant temp sensor circuit), so everything's good.

I had a bit of a scare when I first used Easytherm. I had the MS installed in the car and clicked to download the new values. I was not expecting easytherm to wipe out the MS's memory and instruct me to open up the case and install the boot jumper There was no way to cancel, so I just clicked ok to upload (without the jumper installed). Once I removed and opened up the MS and installed the jumper, I ran easytherm again and everything was ok again.

I did a little fooling around with the settings and found that 2700ohms at 86F and 350ohms at 223F got me very close to my gauge readings and ambient temp comparison. I'll spend some time tweaking those settings as I go, and will do dial in the lower temp setting as it gets colder.
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Old 08-26-2006, 06:45 PM   #2
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If you are using the latest version of EasyTherm you don't need to install the jumper to download the files to the MS. Just agree to what-ever box appears and it will all download fine. I actually use EasyTherm to download all of my files onto the MS. I've found that it it more reliable than the download.ini dos thing.
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