My mxz 600 only runs on one piston when its idling but once i get the rpms up it runs right with good power.. any ideas?

Possible coil pack

I suggest you try one of those instant download manuals. My nephew bought one for me when my car broke and we could fix it all by ourselves with the manual at www.reliable-store.com . This
website is very good for this.
?Try it.

-Yes most car prefer at 750 to 800 Rpm.

Mai Lor

No more than 800 RPMs and if running real good you might be able to get to about 600 with a good smooth idle.

The normal idle for your engine should be 550 to 600 RPMS so thats not to far off . But the fluctuation is more likely the crank pisition sensor then the EGR valve this engine has a condution called crankshaft wip witch is normal but going down a rough road can somethimes set off a misfire code It wouldn't be a bad idea to take the EGR valve off and clean it and check it but the CPK would give you the fluctuation in RPMS . It still could be a few outer things but this it the most likely cause

At idel if it's standard transmisson rpms should be 550 to 600 rpms if it's automatic should run about 700 rpms in drive.

I believe that most automatics like 600 RPMs in drive.As far as how many turns that is,you can use the median settings of one to one and one half after the screw makes contact with it's stop.If you don't have a tachometer to set the RPMs use the turn to turn and a half initial setting and readjust while the engine is running in park.You don't want it to lurch into gear because of too high a setting so take it easy.Lots of RPMs won't let you stop on ice,the engine will power right thru the brakes.So find a tachometer and set the curb idle speed according to the specification sticker on your shock tower or radiator support.

the idler control my be going bad ,,also you might want check for vacum leaks ,its agood idea to change the gas filters ,,,good luck ..joe

make sure the choke is not sticking half closed.