I just recently got my car back from the shop in my hometown where the owner had put custom hfc's on my 06 Z and since then it threw an o2 code which I expected, and another one about the VVT. Also, in 3rd gear around 45mph prior to the hfc, hitting the gas resulted in a lot of power but now it seems slightly sluggish. This week I am picking up and Invidia n1 and was just curious if after this the car will just need to be tuned in order for it to go back to running smooth. I'm kind of new to the game and I guess I couldn't find a thread leading me to any solid answers. If I need to order brand test pipes or hfc's simply because they may be better quality, then I won't have any issue doing so. Anyone have any information on this issue?

 

you slightly changed the way the car breathes, before you get it tuned, do all the breathing mods you plan on doing first

 

Thanks dude!

 

Looks like you had the codes read, but I'd resolve those issues before tuning. Do your HFC's (high flow cats) have O2 extensions on them. Take a look at Z1's HFC's to see what I mean. What was the issue with the VVT? Sounds like it could be a camshaft position sensor gone bad. I just hate to see you try and get a tune when your z isn't mechanically ready for it, and the issues are relatively cheap to fix.

Did you note the codes it threw?

 

im going to read the codes again at work tomorrow and note them. And yeah the HFC’s have the extensions on them. I’m probably going to buy test pipes and just put them in myself. The only reason I had the shop do it is because I really don’t have much time bc of work and school.

 

You will lose some low end power with test pipes