Me78569

I am guessing the remann'd vp44 is bad. I would get the warranty process started.

What codes did you pull? How much fuel pressure do you have feeding the vp44 now?

What could be better... Cummins + Roadkill...in colorado none the less

Yep I wouldn't use DDP for anything haha.

I drove into work today with timing set differently. My normal tunes have timing at 8* and %100 scaling, so at cruise the quad might add ~1 or 2 * timing. I changed the tune to be 12* timing with scaling at %50. This would make masx timing on top ~6* but gave me ~3 * at cruise. Again this is city driving so the oem timing never got into the cruise map, but I was seeing low load timing of ~18*. I dont know if that hurt my mpg or helped but I am at least getting a better grasp on how things worked.

The canbus tuning max for 0-5 psi has been raised to %115 rather than 105%. this should allow more fuel at cruise, which should lower TPS input and raise timing. From the images I posted before the OEM timing map appears to have an high spot in the %15-%25 load range. This is ECM load and not Quad Load. Mike it might be handy for you to play with your tuning while watching load on your OBDlink and see when at cruise, looking for high mpg, try and figure out how to use the canbus tuning to get ECM load% in the middle of that timing high spot. This island is pretty small so it wouldn't take much to make your truck start sucking fuel, as we figured out with the first tunes. I have been watching timing when driving a lot more carefully now that I am all but sure the numbers are right. The ecm does a pretty good job of adding and pulling timing when the situation calls for it. One big thing I have noticed, which I find very interesting, is that during normal city driving and short highway trips you will never see more than 16- 17 * timing from the ecm unless revs come above ~2200. HOWEVER if you are driving down the road for ~10 minutes at a speed greater than ~45 timing jumps from 16* to 18-19*. I posted some info before in regards to this strange behavior, but it appears that there is a timing map that is only used when the ecm code senses that throttle input hasn't changed significantly in a long period of time. It also does this at idle state if the ecm senses that you have been idle for too long. I dunno if this is intenetional or just an effect of the code in place to try and get good MPG when at cruise. Since the Quad allows you to add timing based upon user input this is VERY critical to remember. If you are trying to tune for MPG and you aren't doing longer runs on the highway you run the risk of adding to much timing for longer trips. The ECM will add ~2*-4* of timing on it's own to cruise state once a longer period of time goes by. The timing scaling is also a tricky thing to understand. When you input a max timing value you can't expect to see a huge jump in timing while at cruise. The max timing number just tells the quad at the top of the timing map add this much over stock. At cruise you might only be getting %15-%25 of that timing. I did do some code to show OEM timing when on lvl0 and oem+quad when lvl1+ so you can compare how much timing the quad is actually adding overall. Keep in mind the OEM timing is VERY dynamic, just a few % pedal articulation can cause timing ot drop by 3* or 4* Hopefully this info is interesting to some haha. I plan on doing a good bit of driving on lvl0 to get a better idea of the oem timing outputs from the ECM, because there has to be a better way to effectively custom tune timing...theres aways a better way

that's an interesting one. Has your screen ever read values?

21 psi is fine. 14-20 is normally the "ok" range. I ran 25 psi for years with no issues. They are better as pusher pumps. I would cut the excess fuel line out.

nope, Your surge issue is strange. I would just run the defualt tune until the V2 tuning is released. all my custom tuning surge issues went away once I was able to do the V2 tuning. Your turbo timer issue would be related to your apps if anything. The box is what handles the turbo time the screen doesn't really have an effect on it, at least according to the code.

connection to the device shouldn't matter, I would guess that it is not working due to TPS input or misreading.

That's the worst to happen before the season opens. Can you jam another spring into the mag to help it push up? I would be taking it apart to see if it is catching on a corner of the mag something.

That was a run on lvl 0 so OEM fueling only. Canbus fueling is based upon OEM fueling then a % above or below that to give us the 65 hp over stock.

I have finally gotten around to testing the new APK from Spencer over at Quad. It is working great. I didn't notice the bug that the app used to have. It does take about 4 - 5 seconds for the tune to fully apply but it can still be done on the fly. It was fun to switch between low power mode on different tunes, I have one tune with % set at 20 one at 40 and one at 85. at %20 the truck won't hold any speed, just slows down slowly and finally dies haha. Another cool feature that NO OTHER 2ND GEN TUNER offers.....See it? "How much timing? well I dunno more than level 3" that is something you dont need to wonder about anymore...

good to hear she is getting through it.

If you are planning to get a quad get at least 7 x .009 injectors. you can control the canbus tuning a lot easier than wiretap. Since you can canbus tune you can use your injector size for power and the quad for tuning.

If money ran free like the salmon of Capistrano I would tell you. do some 245/75/17 tires with the alumninum 3rd gens ditch the BD injectors for some 7 x .009 DFI or DAP injectors get a quad and mess with your timing unitl mileage comes up. slow down to 55 and enjoy the roses. But we live in the real world so I would say slow down, and get some different tires next time you need them. beyond that it is hard to justify the cost of mods for the small return on investment.

I didn't think you needed to pull a fuse to do the test? Are you trying to prevent it from starting? If so just disconnect the vp44 plug.

Are you hand calcing hte numbers or using hte scan gauge? Honestly I struggle to break 20 unless I am under 60 mph. 55 mph = 24-25 easy 60 mph = 21 maybe 65 mph = 18 mpg 75 ,mph = laughable Tires make a unbelivable difference. I recently went from heavy 235/85/16's to a lighter 235/85/16 and I picked up nearly 1 mpg.

Don't be sorry. Just seeing what the doc's thoughts were on it in terms of serverity and outlook.

Good news. Are they planning on releasing her soon?

alright, Report back on the tune tyler sent. You can bump timing back up to 7.5 as it is not the cause of the surge.

light throttle or heavy throttle or both?

Tyler, That does work as a plan on action.

What level does it start surging on. If you run on lvl 1 does it surge lvl2? Lvl3+?