Hey all,
I have a wonderful S70 with about 130,xxx. Over the past couple of years I've had sporadic idle RPM's and increasing acceleration problems from my car. The initial symptoms were that the car idle would jump around 1000 +/- 200 RPM's when coming to a stop. Once stopped it would settle down at normal 1000 rpms. Sometimes now as I come to a stop or even if I just let off the throttle and it has to idle down it'll dip really low to about 500 rpm's, hover there as I slow down, and then come up to 1000 rpm's when I stop.
When I floor the car or have the pedal around 3/4's throttle (trying to pass someone, for instance) the car will accelerate but with many hesitations. It won't linearly accelerate, it'll stumble up in increasing RPM's. Sometimes if I apply throttle slowly it'll accelerate more fluidly. This problem is sporadic though, so it doesn't always do it.
The hesitation problems also begin to occur more frequently if I've driven the car several hours on the highway. Sometimes cruise control will disengage and I can't use it until I turn the car off and back on again.

I find that all the problems happen less when the car is cold.

I suspect Air Mass Meter (AMM) issues. I've also read info about the TCM failing. I have no lights on in the car though. A few years ago when these problems began I cleaned the AMM and everything improved. That lasted about a year and the problems began again. Fuel economy seems to be where it should be.

I look forward to any help y'all can offer. Thank you.
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