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I have an 02 f4i, has arrow carbon exhaust, k&n filter, pc3 idle is rough and trying to drive in traffic under 5k it sounds like it's running on two or three cylinders, changed plugs, fpr, checked all connections and vacuum, removed pc3 no change, if I disconnect the map sensor the idle gets normal and the bike sounds better, I have no f1 light, I am also getting 100 miles to 115 per tank....please help, I would just change the map sensor but I did that with the fpr and no change
 

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Discussion Starter #2
Btw sputter happens under light throttle only as in rolling into the throttle or maintaining speed under 5k
 

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Step 1 Easy. Open the PC map, use zeros (0) in the first 2 columns on the left side. Save changes and reinstall map.
Step 2. Hard. Remove pc from bike = test ride to see if sputter clears.
 
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