2000 Mazda 626, 2.0L, DOHC, 4 cyl, automatic.
Runs down the road fine. Everything's normal when the engine is off idle.
Problem: Very rough idle and stalls - in or out of gear.
Compression good, tune up items good, no fault codes in computer.
Throttle body clean, EGR checks OK, idle air bypass checks OK, TPS checks OK, no vacuum leaks found.
Engine starts right up and immediately starts to slow down from 1000 rpm's until it hovers around 5 or 6 hundred, starts shaking and generally stalls within a minute. Consistently gets real rough and stalls at a stop in gear in 10 or 20 seconds unless the throttle is feathered.
I just priced out a few of the items that I thought might be suspect and got a whole new "appreciation" of Mazda - the idle air valve, for instance, is around $500! This is definitely not a vehicle to be replacing parts on a hunch.
Any help or tips are appreciated. Thanks.
Runs down the road fine. Everything's normal when the engine is off idle.
Problem: Very rough idle and stalls - in or out of gear.
Compression good, tune up items good, no fault codes in computer.
Throttle body clean, EGR checks OK, idle air bypass checks OK, TPS checks OK, no vacuum leaks found.
Engine starts right up and immediately starts to slow down from 1000 rpm's until it hovers around 5 or 6 hundred, starts shaking and generally stalls within a minute. Consistently gets real rough and stalls at a stop in gear in 10 or 20 seconds unless the throttle is feathered.
I just priced out a few of the items that I thought might be suspect and got a whole new "appreciation" of Mazda - the idle air valve, for instance, is around $500! This is definitely not a vehicle to be replacing parts on a hunch.
Any help or tips are appreciated. Thanks.