Help Nobody can tell me whats wrong !!!!!!!!!

[bbtruck72]

I bought a new 2010 superduty 2 years ago. At 2000 miles I did a dpf, cat, egr cooler delete with a H&S xrt programer. now at 40,000 miles i have an issue where the truck defuels if i sit at idle to long. I can drive it all day long hauling 30k and it wont defuel but as soon as I sit at a stop light or even at the drive through window at mcdonalds it will defuel to stock. I,ve taken it to Ford, local, repair shops, and even Diesel Dr. Here in wisconsin. nobody so far can tell me whats going on. If anyone close by wants to give it a try I will pay you for your time. I do have a cheap matco scan tool if you want me to look at some pids or diesel dr has a really nice snap on scan tool that can look at anything the dealer can I think. I've even contacted H&S and they had no idea whats going on. No ses light and I can get it to work again by just turning the key off and back on again real quick.

[turbo kidd]

My answer is not going to help you....However, I had the same problem with my 2003 Dodge 5.9 Cummins. I spent a lot of money and drove out of state twice to VERY knowledgable Diesel techs and I never got it fixed. I ended up putting the truck back to stock and trading it on my 2010 6.4. Good luck!

Turbo Kidd

[Motorboy8769]

I'm an idiot for asking but by defuel what do you mean exactly?


Sent from my iPhone using AG Free

[bbtruck72]

Loss of power or reduction in power levels from tunner but H&S swears my tunner is not capable of this.

[drunk on diesel]

is this an original XRT or an XRT Pro?

[bbtruck72]

Just a XRT not the pro

[drunk on diesel]

the original XRT cycles the EGR at idle. Is it possible that you've got a sticking EGR and the XRT has blocked the DTC?

looking at PIDS with delete tuning loaded is tricky because a lot of times they'll block or modify the signals to fool the ECM.

Have you tried reloading the tuner? Are you running the latest software version? I realize they haven't updated the original XRT in a LONG time, but it's worth making sure you're on the last version

[bbtruck72]

sticking egr is possible but i removed the coolers so if it is sticking its not from heat or carbon build up but it is possible. and yes Ive reloaded the tunner many times. My scan tool only shows 2 pids for the egr what exactly should I look for?

[bbtruck72]

and yes it is the latest version

[drunk on diesel]

where are you located? If you're anywhere near Alvin, TX we could load my mini maxx to the truck and see if it still does it.

shot in the dark at this point