I finally got my swap done for the most part but have one last issue to tackle to complete my swap. I did a 1996 auto 2wd to manual 1991 awd. It runs strong but when I go above 3k rpms when the cars warmed up it stalls out and stutters really bad. The 2 codes I have are for the transmission only. I've changed out the maf, o2 sensors, and spark plugs with little to no change. As long as I down shift before the rpms get to high the car seems to run pretty good. Any ideas out there? Really stumped

 

Fuel pressure and timing all good? Might be getting a knock at higher RPMs/advanced ignition timing?

 

Like the engine has a little lifting noise but the fuel pressure is good