I have a basic tune on my car with a 242/244 cam... it starts up and holds idle PERFECTLY, however under WOT it runs like crap... looking at the LTFT and STFT they are NEVER anywhere near zero, either way positive or way negative... how do i correct this?

Side note - I am using HP TUNERS

 

At WOT at least STFT should ve = 0, are you sure it's going in PE?
Fuel cell at WOT?
Is your TPS at 100% at WOT?
How much MAP you read at WOT?
How are LTFT and STFT while cruising?

 

What do you consider a Basic Tune? With that cam is should need more than a basic tune.
Are you using a wideband?
Have you tune the VE tables in SD mode?
MAF tuned?

Don't be going WOT until all of this is done correctly or you will be back on here saying you are ticking, burning oil, burned pistons, funny hole in the block etc.

 

A basic tune in my mind is what chuck from HPE emailed me... a mail order tune! In the meantime, SOB! I learned so much last night... no wide band but my LTFTs are in the ******* 20s... most are almost 30!!!! HOLY ****! I am doing the VE tables in SD mode and tuning my maf today. thank you sir.

 

No Wide band you have no idea what ur A/F ratio is at full throttle. Lean is hot. That is bad. I would get a WB before I do any wide open runs. But that is just me.

 

my oh my.... my injectors were at 104!!! I was maxing them out! Put some 36lb injectors in there and changed the propper settings and now i am running with mostly all zeros in SD mode!!! yay for me!

I ran out of gas and daylight so I cannot finish my tuning, but damn, this thing runs SOOOO much better now!!!