ModMuscle

Hello everyone ...got a 66 chevelle with LS2 from TBSS and an 06 GTO intake. Speartech harness. Stock engine with headers and K&N CAI. I keep getting lean condition codes. Started just the left bank now its both. I searched and did all the things mentioned such as clean TB and MAF with correct cleaners. Changed exhaust gaskets. Made sure all exhaust was fully welded. PCV is hooked up like GTO would be. Under manifold to TB and passenger valve cover to CAI. I pulled intake to ensure o rings were right and then re-torqued per specs. Tried starter fluid for vacuum leaks. Nothing.

If I drive very carefully ...I can go several hundred miles with no problem. It seems to happen mostly when I "get on it" but it has happened just backing out of garage. Will someone please offer so advice? Could it be a tuning issue or is it likely a
hardware problem?

I'm not sure where to start now. I know of Noone locally that I can go to. (Tucson AZ)

Thanks for any advice.

Aaron

2xLS1

iTrader: (25)

LT Fuel trims are over +20% to set those codes. O2s going to low mv in PE can set them too. Check fuel pressure for 58 psi. Unless the tune is bad...

Speartech

iTrader: (14)

It may just need a slight re-scaling of the injector flow table. We run into that occasionally when different combinations of parts are put together.

edcmat-l1

iTrader: (10)

If you'd like, I can sell you an HPtuners suite and help you get it dialed in. If interested, send me a PM or email.