Went riding last week, things were good until I started pulling longer climbs. Noticed when the pull(rpm went down to 7000ish) got hard the engine seemed to go flat....not a bog but just not much there. Started trying to tune it out(It's an 05 with speedwerx pipe, y-pipe, mbrp can, sno-pro intake, RKT head and secondary and a boondocker box. Using an AEM air/fuel.) Found that at WOT it was good but if I let off in a climb and feathered mid to 3/4 throttle it stayed kinda flat. It's quite possibly not back shifting, but I did try to tighten up the RKT secondary, didn't change much. I'll try a stiffer primary (has 70g wieghts) with a yellow white spring.(I ran out of daylight) Elevation was around 5000ft. Tried adjusting fuel both ways....not much effect. Still learning to tune with the boondocker.I maybe don't understand the lo-mid-hi settings on the box...will have to do some more research. Anyway, not much there in the mid to upper unil WOT...when I would go wide open it engine would take a few seconds and then climb back up and run great. The engine tone would be different while lacking power too. Any thoughts? Never noticed this last year...since then came the y-pipe, sno-pro air, and RKT secondary. I heard that the stock air is best but I have and after market hood, anyone else had problems with after market air?
05 M7 Mid range loss, fuel or clutching?
- Thread starter westech
- Start date
Power valves might be sticking. Clean them out good and see if it helps. They should open at ~6800 but you can still rev higher if they aren't opening, and the sled won't have jack for power. This is the easiest thing to check anyways...
FWIW, My '05 M7 tends to stutter around if I am in the 6800-7100 RPM range for too long because (I think) The power valves are probably opening and closing instead of just staying open or closed....This is my thinking anyways....
FWIW, My '05 M7 tends to stutter around if I am in the 6800-7100 RPM range for too long because (I think) The power valves are probably opening and closing instead of just staying open or closed....This is my thinking anyways....
its studdering in the 6800 range because thats a lean spot right before the powervalves open best not to run it there for too long
Neato. So I was close, and I don't because I hate that little stutter. Thanks for the heads up!!
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