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Hi! My c240 has a slight miss at idle , replaced plugs still a slight miss . my question is could my catalytic cause the idle problems it raddled for a longest time then stopped could it be blocked inside? theres no checklight on or could a bad ignition coil do it, and if it coil is there a way to check them. thanks
 

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All I can say is I hope it is not your Cat... had to replace 1 of mine 02' E-320 $1200...
cannot get used and had to get it at the Dealer.. worse there are 2 of them..
Good Luck
 

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Hi! My c240 has a slight miss at idle , replaced plugs still a slight miss . my question is could my catalytic cause the idle problems it raddled for a longest time then stopped could it be blocked inside? theres no checklight on or could a bad ignition coil do it, and if it coil is there a way to check them. thanks
Probably the ignition coil
is good to check with STAR ...:)
It also can cause if that's any air leaks
at the breather hose joint ...:D
 
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