MID-RANGE CUT-OUT
That part throttle "cut-out" could very well be the mid-range "LEAN" condition.
My 2007 D7 used to do that between 5000-6000 R.P.M., you'd swear I hit the kill switch for about 2 seconds, oddly enough it did NOT do this in below zero temps (when you would think it's even leaner???) it must be that the factory fuel program "over-compensates at those temps????? Dealer insisted it needed the fuel/vapor seperator and new t'stat, did both of those and made no improvement what-so-ever.
Ended up installing a PC-3 from DYNOTECH Jim w/his mapping, 7-10% RICHER in that mid-range, problem solved.
Hope this helps
That part throttle "cut-out" could very well be the mid-range "LEAN" condition.
My 2007 D7 used to do that between 5000-6000 R.P.M., you'd swear I hit the kill switch for about 2 seconds, oddly enough it did NOT do this in below zero temps (when you would think it's even leaner???) it must be that the factory fuel program "over-compensates at those temps????? Dealer insisted it needed the fuel/vapor seperator and new t'stat, did both of those and made no improvement what-so-ever.
Ended up installing a PC-3 from DYNOTECH Jim w/his mapping, 7-10% RICHER in that mid-range, problem solved.
Hope this helps
I also have an intermittent issue that does a "kill switch" type effect. It only happens at part throttle and only after riding for several hours. Once it cools off completely all symptoms are gone. It runs fine at full throttle and max rpm's do not drop - just does the weird part throttle cut out routine.
The dealer replaced the stator at the end of last year but mild syptoms started to re-appear on the first ride afterwards (again, not until several hours into a ride). The cut out got really bad on last ride and I took it into the dealer again. They claim they checked the stator, TPS, ECU, etc., and no problems anywhere.
I am taking it to the snow this weekend along with the dealer. If it acts up again supposedly they will be able to diagnose it on the spot. Will post any progress.
Last edited: