Alright guys, I am at a point where I am stumped. I have put my tune back to the way it was before, but I am having problems still. Right now, I am getting LT's pegging out at 25% no matter what I do to the VE table and getting surging at idle. I am thinking due to the fact that I had the IFR at 42#/hr at one point and it was basically flooding the engine, I think that I could have ruined my NBO2s. Since I am obviously going into CL mode and the PCM is saying 25% LT at idle on both banks, I am thinking that the O2s are bad or I have a fouled plug. My question is, if I installed the Innovate LC-1 in place of one of the O2s and then wired it in to simulate the NBO2, do I disable the other O2s since they might be bad, or in the tune do I say never go into CL mode and this would rely completely on the WBO2? Also, would a fouled plug cause surging? This is the part that I am missing. I am attaching the latest tune.

 

Anyone have any ideas? What about the cat? Could it cause surging?

 

Are you using hptuners or efilive?

 

This is EFI Live.

 

It would help if you gave some information on the engine and changes. Other than it being a 4.8, what in the engine is not stock and why the 42lb injectors, are there any LT's, etc. The tune says it is for a returnless system. You should post the scan using the basic performance Pids, that would show if the O2's are switching, etc. I am sure those with more experience in tuning would then be able to help you.

 

Well it is a 6.0 with a Whipple Blower at 5-6psi. I have upgraded the injectors, but they are only the stock 8.1L injectors, not the marine ones. I have not monitored the O2 voltage yet. That is my next step.