any ideas?

[polaris fan]

my 06 M7 has a bog at low end and is cutting out at hi RPM's

 

[leadfoot33]

secondary clutch spaced properly for belt? are the powervalves clean, adjusted properly and is the servo working?

Logan

 

[polaris fan]

i am not exactly sure what the servo is and yes the power valves were just cleaned i have read on another forum that some of these M7 have to high of fuel pressure and i just noticed that the end of the tube off the ecu was down by the can could that have anything to do with it?

 

[leadfoot33]

it could be. mine is routed straight down getting fresh air. the servo is in a little box right behind the pipe. its got a cover on it. you can take the cover off and run the sled up to i think its 6800 and see if the servo moves and opens the power valves
hope that helps some. and yes some have funny fuel pressure. also what kind of fuel are you running? brand and oct?

 

[polaris fan]

thanks for your help i am just running Cenex premium with no ethanol

 

[leadfoot33]

i have read that they run better on 87 but i havent found a fuel yet that doesnt have the ethanol to try. i know when i run 94 it gets a mid range sputter.

 

[polaris fan]

yeah i work for cenex and we have both 87 and 92 with no ethanol and i have tried both but not much difference i am just wondering if it has to high of fuel pressure

 

[leadfoot33]

its definetly possible best get it checked out. i think they are supposed to be around 44psi at idle.