I do still need the bumper end piece. Let me know what you have and how much. Shipping is to 40503. Thanks for replying!

that was the very first thing I did! im running good now, was very hard to diagnose bc it was multiple issues, vacuum leak, huge boost leak in turbo compressor housing and a leaky damper

Try engine temp sensor. It's something you don't have visibility on but makes a difference. $15 for OEM Bosch only.

thanks for response. I have Lindsey racing chips and MAF 3 bar fpr super 61 with Ptrim and 3 inch down pipe to 4 inch out. I have been adjusting maps and it has improved. I have a wideband but don't really know how to hook it up to the computer to log so its basically just a gauge right now.

It seemed to get better on its own, might be temperature sensitive. Switching back to the 2.5 helped, had the motor pulled and did full seals, turbo rebuild, rods and mains, and it seemed a bit better afterwards too. If you are using a wideband and you are still rich, it might be your chips (Autothority are known to run very rich, as are others). There is a 2bar as well, or rather, an adjustable. I was/am thinking of getting it... but I think better logging/data monitoring would be best (for me).

Sorry I couldn't be more helpful.