I got a new tune about 3 months ago by a local shop...The shop did a great job and my car has been running perfect.

I recently bought a new 38mm tial wastegate to replace my old one (ebay knockoff also 38mm) an AEM fuel rail and i also rebult by turbo.

I installed the new parts on my car, the car seems to be running fine, only thing i did when i installed the new parts is brought nthe Fuel pressure back up to where it was when the guy had tuned me. I also have an AEM wideband. The wideband does not read lean it seems to be about where it should.

I called the shop back up to have some suggestions to see if this was ok to drive with the new parts and they told me that i could run lean because the new wastegate could opening faster, also wiht the rebuilt turbo it could be spooling faster, even though it is staying at the same boost level he tuned me at. He suggests i bring it back for a retune..

My question is, is do i really need to do this if my wideband says im not running lean??

Is he jsut trying to make money off me??? HELP!

 

Is it runnin like crap? I wudnt tune it just cuz u replaced some parts. It is probably running differently but not that much. Id just play with the fuel pressure if that's all u changed. Even that shudnt change ur mixture. Ur computer controls that

 

If you want the most power out of it, yes. Would I? Probably not. They are right about the rebuilt turbo spooling faster though. If you bring it back, it shouldn't take more than an hour.