Booboo

Its not bad but under hard excelleration truck looses power for a sec than it comes back and sometimes it fluttres until i let off maby not enough fuel or air but i thaught the jr took care of all that i am running a stock filter for now and on sw2. i realy did not expect this with the mods that i did it seems like most people have great experiences with doing delets

staarma

Sounds like it could be fuel pressure giving you problems. Do you have any gauges measuring the supply or high pressure?

Booboo

not yet but shouldent smarty bump fuel supply

PapeCAT

Sounds like your TCV butterfly is closing? I heard that this could be choking the motor with the EGR disabled. Try unplugging the butterfly valve on the intake, maybe that will get rid of the problem.

staarma

The smarty will not take care of fuel delivery. It will or can bump high pressure fuel but it doesn't help if the delivery is down. My 04.5 did the same thing you're talking about and a FASS fixed it up. Could be lots of other things too but the fuel seems obvious to me since I had the exact problem. Hopefully some deleted guys can chime in. I haven't touched my new truck yet.

Booboo

Not enough fuel makes sence. I unpluged the valve when i did the delets
Im supprised no one else has had this problem with 2010

NCPADiesel

Just a question, when was the last time you changed the fuel filter? The Smarty will naturally be calling for more fuel and if you're plugged up it will starve the motor under hard excelleration. Start simple and see if it helps.

cfdlighthouse

I have the same issue with my 2011. smarty jr me set on s1, but i have full deletes. if i smoothly roll on throttle it takes off like a rocket ship, but if i stand on it, there are lots of up and down shift activity, its like the transmission is lost trying to find out what to do, which i guess would exhibit like an engine power loss, but i really think the tranny is trying to decide what to do more so than the engine is starved for fuel. H&s had a tranny tune that i think addressed that issue on their end. I dont believe mads ever did though. However, i will change my fuel filter and see if there is an improvement. good luck

TBittner

a couple times now i think ive experienced this with my 2012 g56 completely stock. I have all of the necessary equipment to remove emissions equipment but im waiting to see if i really have an issue or not.

Booboo

My issue happens the same way yours does I dont think its a tranny issue thow as I have a 6 speed. I changed the fuel filter still have the problem it might have helped a little thow. Well i guess gauges are coming sooner than later and prob a FASS I was hoping not to have to spend so much money at one time

staarma

You might be able to use an app on an iphone or android with the OBD interface and be able to look at rail pressure. At least if you saw an unhealthy drop in fuel pressure while experiencing the "miss" it confirm your suspicions before you spent a lot of money. Or, maybe one of your friends has a monitor you could use to watch the pressure to try it out just for testing purposes.

I'll see what I can find for smart phone apps out there.

Edit: Looks like an app with bluetooth OBD2 adaptor called Torque is the best one right now. Looked on ebay and saw the adaptor for $25. Not sure what the all in price is but you might check first before buying all that other stuff.

http://www.amazon.com/BAFX-Products-...d+ii+bluetooth

http://torque-bhp.com/wiki/Main_Page

Cummins610

I wish companies stopped recommending Smarty tuners for 2010+ trucks. I feel for you guys that are having problems that are 100% caused by poor/unreliable tuning or lack of install instruction, how difficult would it be for the manufacture to have a page on their website dedicated to the proper way the truck needs to be modified in order to work with their tuning?

Booboo

Thats cool that thay make a app like that. Thanks for the info ill give that a try first