neanicu

Ok,as soon as you start the engine,the computer looks at the Long Fuel trim numbers and starts from there. The Long fuel trim is like a memory you have from the past.
Once the O2 sensors go into Closed loop,the computer adjusts the mixture to keep the O2s " happy " switching between 0 to 1 V in most cars.
If your LT fuel trim starts at -7.8 which meant pulling fuel away,the computer will start adding fuel to keep the O2s happy,so your ST fuel trim will go positive for balance.
When you raise the RPM the injectors will squirt more fuel so the computer will intervene to keep the balance.
Again,all these numbers seem normal to me. Looks like the mixture is good where it is...
We need to start looking elsewhere...

judd944

Should I swap diverter vales?

neanicu

Can't tell you 100%...
Further diagnostic might be needed before starting " throwing parts at it "... Personally I don't like this approach...it can get expensive fast!

Kevin

DV's can be tested. Use a Mity Vac > connect to the top fittings and pull vacuum... It should hold 28 inches.. If it doesn't you have failed DV's and/or ones that need to be rebuilt/cleaned.

judd944

I made a few more datalogs in 6th gear this afternoon. one with the MAF connected one without. It felt like it rumbled more without the MAF than with it connected. I also was going up a slight grade so that could be it.

judd944

wish I would have bought the mity vac instead of the vacuum gauge I bought last week.

judd944

And there was much rejoicing in the land of the GT1 block!

judd944

broken bracket on Bank 1 where I was getting the misfires. the oil only came out because I removed it briefly. I need to order a new bracket before removing this one.

neanicu

judd944

Thanks for everyone's help, I learned more about my car in the last few weeks and feel good finding a common problem on the "outside" of the engine!

PAULUNM

I think it's a good idea to proactively replace these brackets when you're in there for plugs and coils. I know I did.

Carlo_Carrera

Good job, nice and simple, sorry no one mentioned it when to were doing your plugs.

judd944

New bracket installed on both sides. Test drive went well. Car is running great. Thanks everyone!