Ok guys need some help here as Im missing something. My buddy bought an 09 lmm and he recently deleted the dpf. Well I ordered him a dsp5 switch and while we are waiting for it to get here I went on ahead and turned off the dpf and egr and all mil request's for them so he can drive it. Truck is cycling vanes @ around 2krpms in first and reverse and also it falls flat during acceleration for just a moment and then picks up and runs fine. maintain a constant speed @ around 70-75 and the truck will cycle vanes falling flat and then picking up. I noticed in efi there are some tables from the 08 to the 09 that are different for the vane control and boost pressure(desired boost levels,transient and turbo vane target position,transient). Anybody ran into this? Ive never had this problem with any other lmm ive tuned. The truck does this with the stock tune and just the dpf and egr turned off. No cel's just the vanes cycling. Driving me crazy! Thanks in advance!
LMM: cycling vanes and flat accel after dpf delete
- Thread starter BigDMax05
- Start date
Send me tune ill look it over see if i can see anything also have you tried turning the egr back on? Also try unplugging all the egr stuff?
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Pm me your email and I'll send it to you. No havnt tried turning on egr. Thanks for your help!
Unless you have a blocker plate installed, the EGR will open and close on it's own if you shut it off. If you have no plate in it, leave teh EGR on but set the limiter tables for temp so that it cannot come on due to temp limiters. This will make teh ECm keep it closed, but if it opens it will look for it whereas if teh EGR is disabled it will not look for EGR flow and when it pops it will do funky things.
Also, there is an air intake valve to unplug with it. H&S have instructions on there website.
http://www.hsperformance.com/lmm-egr/
http://www.hsperformance.com/lmm-egr/