Heating up, but at normal operating temperture runs normally, would like to bring idle down and stop the fluxuating while heating up,, its an auto 1991 model mazda 626 2.2
Maybe vacuum leak or intake manifold leak. sounds like components are doing there job adjusting to air intake, matching the amount of air brought in with the amount of fuel that it would demand to produce correct emmission quality. check this out. you can use carb cleaner to spray around your throttlebody and intake manifold and if the engine idle fluxuates you have a leak.
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