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Old 05-07-2017, 12:31 AM   #9 (permalink)
me and my metro
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Join Date: Jun 2008
Location: Oregon
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Economy Saturn - '02 Saturn L200
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I would be tempted to add a resistor to the temp circuit to trick the computer. This is the chart out of a 2002 4t40 manual. I would think 400 ohms would do the trick. I did this to the iat and coolant temp sensors a few years ago while playing with a Geo Metro. I could start the car like normal and within 1 mile from cold start I could flip the switch and the car would tolerate warm fuel trims. Put it on a spdt switch so you could make it lock up when you wanted. You will loose the overtemp ability if you lock the temp with a resistor. Verify that this chart is accurate for your car, as always use at your own risk.
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02 Saturn L200 5 speed- soon to be a B207R and f40 6 speed. Almost 250k
84 Gmc 6.5 na diesel K30 4x4, TMU
2006 Lincoln Navigator, 200k+

Last edited by me and my metro; 05-07-2017 at 11:58 AM..
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