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S1: I reinstalled the stock computer on the cold engine. When I started it, it raced to about 3000 RPM, but settled to 1500 RPM after a quick blip of the throttle.
A1: Sounds like you still have the AWS solenoid installed and hooked up. That is whay causes the short duration 3000rpm. It was to quicly heat up the pre-cat. Usless and bad for the engine.
S2: After it warmed up, it's idling at 1100 RPM (no pulsing), with the TAS fully backed out.
A2: Could be, but have you insured that the throttle is full closed? Improperly
adjusted throttle cable or cruise control cable may keep it from closing.
Stuck dashpot may keep it from closing. Bad hot wax rod/fast idle cam assembly may keep it from closing.
YOU HAVE to know the engine systems.
That is why I tell everyone, make section "F" of the Mazda manual your bible./
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