[CK_Bladesmith]

Originally Posted by mtimney

Unichip Jack.....Finding a stable tune for my new header??

I'm running a P&L header, Perrin overpipe, 2.5" Isis pipe/muffler with a 2nd cat delete, and a drop in filter with a Perrin silicone intake tube. I'm uding 93 octane and have tried the appropriate 'all header/all cat-back/all drop-in tunes with fuel+ and fuel-. I've also tried advancing the timing on these. I tired timing- for one run, but I'm not getting anywhere.

I notice very little difference between the tunes. They all seem to run rather well at first, but after a couple hours of driving I start having a rough idle, some hesitation when I hit the gas and an inconsistent engine running up the RPMs.

I had things working well before I added the header, but now....??? Help!

I had this exact same problem when I added my rev works header while using the unichip. It worked great for a while but started having the same issues that you are. My solution? Take off the unichip and get a tune. The unichip is a great product, but it can only do so much. :/