if it was a manual car it definitely wouldn't affect anything.

but since your car is an auto, the higher idle will spin the transmission faster, making it want to go forward more. i'm not sure if that will be enough friction to have any long term effects on an auto.

 

More heat generated by the torque convertor when you're sitting at a traffic light, but I'd think the tranny coolers could keep up with it. Also it may 'slam' into gear harder, which isn't good for the half-shaft CV joints, rear gears, and driveline. But a little higher might be OK. Driving an automatic car with a high idle gets to be really old, though, because of all the standing on the brake at stoplights.

 

Just changed it to 800, so far so good


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Only problem I'm having is the cooling fans are staying on. I have a 180* thermostat, with the high fans set at 194, and he low fans set at 189. Before I raised the rpm to 800, the engine temp would stay around 188-190 consistently. Now it constantly fluctuates between 181-186. Should I raise the fan temp to high:199 and low:194?


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