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m7 too lean! box not adjusting?

E

everytime5.9

Well-known member
Alright all season my m7 has been giving me the fits. Its a m7 with a RKT m8 kit, SLP twin pipes,boondocker box vforce etc... 2 years ago i got the m8 kit and ran a speedwerx single and i had good plugs and good egt readings that matched the plugs. this year went to twins and my plugs were just too lean/hot. i tried tuning with the boondocker and no matter how much fuel i added it wasn't changing the plugs. i went back to single and it was better but still lean. i couldn't get them back to what i had the previous year. all season ive been in the shop playing and afraid to ride it. i replaced base gaskets, head and reed gaskets, leakdown test,compression test. coolant seems to circulate fine. the only other change from the previous year is twin pipes and i sent my boondocker in to get a new face plate because it was burnt. and they sent it back with updated programming and it just doesn't seem to be the same. for twins on the m8kit some recommended #s in the 7800+ range were 18. i ended up at 20 then to 30. with the same lean plugs. when i set to 30 it bogs when i smash the throttle let off and hit it again it rips like normal. i cant duplicate the bog it seems like it doesn't keep the programming. sorry for the length but its been a year summed up into this and i am loosing my mind. ANY help at all please! I'm down to testing fuel pressure. voltage regulator and ecu. thanks if you read that!
 
It would not be the first boondocker box that did not work right. It could also be the fuel pressure is too low to start with.
 
Just a thought but remember that gasoline now has ethanol added this year. You will need to disconnect the ethanol plug next to the ecu so it will richen back up to compensate. Once unplugged start the sled and the ecu will reprogram itself to richer mapping.

Maybe ????

MX
 
Thanks for the help guys. and yes ive played with the plug with no change. my next test will be fuel pressure and ill go from there. most likely send in the box to be checked. also is there any noticable ways to tell if your timing is off without a timing light?
 
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