Diablosport Forums

I updated to Vr9 10 and have the miss and stumble again and milleage went down 3.5 MPG going from Portland to San Jose wish i would not have updated.
My numbers VXAPin3 hex Ser# d009EF5 U7165 pcm 6_0 V9r10 lots of black smoke 100 setting ,60 setting stumbles under load, 40 setting stumbles and black smoke like 1 injector is bad I went back to stock and no miss no problems,I have changed fuel filters twice and there clean how can i get back to the previous Programer setting?????? Any help! thanks


Truck 2004 Ford 6.0 Automatic 6" lift 35" tires

Did your truck do this with the previous tunes? Could possibly be a mechanical issue. The injectors pump etc might not be up to the task of delivering the extra fuel that's commanded of it. Any hard starting? Excessive cranking?

hello: No hard starting and the previous update 9r07 was good no stumble worked good mileage got 18+ on hwy at 70mph.Im hopeing not injector but no ruled out Im a field technician for Caterpillar 25 years plus and know the fuel system well thanks for any help>

hmmm seems strange. Any check engine lights etc.. when the problems start? 9r07 had alot of issues with stumble etc, then tend to clear up with my revision for the most part. Only thing I've heard is a stumble while towing, which im currently experimenting with. How's the egr system on that truck? all there? still fuctional?

O and here ya go to answer your question, this is the old crom, give it a try and see what happens..

Make sure you restore your backup first. If the predator bitches, use the legacy connect feature in dsdownloader

Thanks Im going back to 9r07 and at least get home with mileage and no stumbles I will wait till more people get the problem fixed or I could try a custom tune if you have one for me to try Any Many Thanks still love the tuner.

let me know if there is anything else I can help you with Blaze

Hello again I didnt u go back to the 9r07 but stayed with the 9r10 and the mileage is great but I still have the stumble at about 1500 rpm to 1900 rpm and only up hills empty or towing drives the wife bonkers says buy chevy NOT! Im not sure maybe one injector but as always go to stock no stumble.Any more help?Still would like to say many thanks for the great product.