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08-11-2004, 04:04 PM
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Moderator
Join Date: Sep 1998
Location: Grand Rapids, Michigan, USA
Posts: 1,001
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Try backing the TPS voltage down to 0.90-0.95V. It really doesn't make a difference whether it's 0.99 or 0.95V over time anyway. The computer will learn, but the 1.0V barrier should not be crossed. You could have a voltage drop in the very leads you're using to measure the voltage, so it's just plain "safer" to go lower.
The other thing I've seen is the computer does have a problem regulating idle if the ignition timing is too advanced. The supposed "Mass-Air Idle Problem" was cured for me by backing the timing off a couple degrees (to 12BTDC). If you really know an EEC's programming and how timing affects idle/throttle response, it does make perfect sense.
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Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco 
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