So I don't really know where to start here I had a 4.8 with a cam and bolt ons and a dyno tune I bought a ly6 motor had it bored .020 over 224 cam and 799 heads I got a tune from a sponsor on here to make it safe and drivable since I got bigger injectors to well I swap the computers and she fires up my buddy is a tech at a Chevy dealer and we had a tech 2 at the house the truck ran horrible it was popping and back firing I attempted to drive it and I couldn't get the truck over 20mph let alone rev it past 2500rmps in neutral and reduced engine power came on we hooked the tech 2 up and my buddy said it was running super lean he said the tech 2 will only read so lean and I guess we were at the max the tech 2 would read I swapped back to the 4.8 computer and she fired up and ran 100% better does any one know what could of went wrong with the tune or what they could of messed up? I contacted them and they said that the only way that was possible was I have the wrong injectors from what I told them I told them the vehicle it came out of and gave them the part number so idk what it could be. The whole reason I got a mail order tune was so I could drive it and be safe, sorry for such the long post thanks for your help
-joe

 

Super lean on a Tech II can mean super rich, as well. Just because you yanked injectors from another vehicle doesn't mean that they are the size you believe them to be.

Also, I was turning blue by line 3 and died of asphyxiation by line 7. You should consider using proper punctuation when you write, it will save a lot of accidental deaths in your readership.

 

Well I'm sure it would be a lot easier if I was on a computer and not an iPhone but thanks chief

 

I bought them from a guy on here.

 

It sounded like bad injector data to me. Do you have tuning software? One thing you could do, is take the "safe" tune you received, and swap in all of the stock injector data, then replace the stock injectors back in the vehicle. It should run properly if the injector data was bad for what the injectors are actually doing. If that is not working right I would leave the stock injectors in the vehicle and start over from scratch with the original tune as the tune you received must be off. Once it is tuned properly, you can swap back in the upgraded injectors with only changing the injector data in the tune. A wideband is a very good investment.

 

Thanks for the help man

 

I've Troyes contacting them but it usually takes a while