Ok, so I just installed new turbo header, O2 housing, 3" downpipe, 3" testpipe and lower inter cooler piping. Now my car seems to be running real rough. It has kind of a bad idel and I'm only getting a max of about 15psi of boost...were I was getting 18. Anyone know if I will have to get a retune?

 

I would make sure your exhaust manifold gasket and o2 gasket isn't leaking. I would also check the couplers on that LICP.

Oh and yes, I would suggest a re-tune.

 

Retune or not your symptons are improper install or defective products. Recheck all couplers and exhaust joints.

 

agree with the above. I have 3" TBE LICP and drop in filter and my car idles and runs fine.

 

boost leak

 

Definite boost leak. If anything, you would be just be running rich and you'd be losing power but it wouldn't be running "rough." If it's stuttering really bad which I'm assuming that's what you mean by running rough, check for boost leaks. You're probably still running really rich with the boost leaks but check your exhaust gaskets and couplers for the IC pipe. But yeah, once that issue is fixed, you should do a tune anyways.

 

yes get a retune.... if its running rough then like mentioned check over everything to make sure you did everything properly cause the car should run fine

 

I had that problem before and it turned out to be my bov. changed back to stock and back to 20psi.

 

yea... just check for boost leaks on what you installed... car might be idling rough cause ur MAF is saying one thing but the engine is getting another and throwing it outta wack...

 

X2

 

re tighten all the bolts after a couple of drives to make sure all the bolts are tight and nothing is leaking.

 

exactly what everyone above said !

 

If you are going to continue to mod like this I would recommend making/buying a boot leak tester.

If you don't know how to check for boost leaks there are a couple ways. If you don't have a boost leak tester handy you can try soapy water or brake cleaner.

 

whos turbo manifold? i know when i had put in my megan manifold the gasket it came with leaked immediately after installing it. crap gasket and switched it back to stock. now good to go. check everything something seems to be leaking. yes tune