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Old 04-15-2011, 06:08 AM   #16 (permalink)
saand
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Join Date: Jul 2010
Location: Melbourne, Australia
Posts: 236

bugler - '91 Mazda 626
90 day: 35.89 mpg (US)
Thanks: 15
Thanked 25 Times in 22 Posts
i made a idle air control restriction using a coke can and some holes, it was cut to size sandwiched inbetween the idle air control section and the throttle body.

I also just recently made an electronic circuit to control the electronic idle air control based on the RPM.
My car RPM is now down to 550 on idle even when cold.

It has made a good saving, not sure exactly how much though
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