Is there something wrong..

**kido81** · 03-31-2008 09:41 PM

I have been keepin a close eye on my boost guage for a couple of days. My car vac reads 20 all the time and when i WOT i notice that my boost go to 15lbs and then its drops to about like 13. I have a GIAC chip and i'm runing the 93 program. I dont know if i have a boost leak somehwre or something.
I have changed my TB boot not to long ago it was ripped (as usual). I wanted to know if anyone else has ever had this problem.. I also noticed when i did a boost leak test that one of my valve cover gaskets is leaking very little.
I'm also going to be doing piggies this weekend.and i was wondering should i take out my cats and run staright pipe or should i gut my cats. I know that i might have a problem with passing inspection but i'm not worried about that..
Any input would be great..

**The_Jerbel** · 03-31-2008 11:18 PM

Run standard piggies and straight pipe the CB.

Your car is suppoed to taper off from whatever it spikes at (15psi in your case) to roughly 13psi at redline. That's normal.

**kido81** · 04-01-2008 05:54 AM

so even though i have a GIAC it would only spike at 15 and then drop to 13 i thought it should hold it there thats what atleast my talon used to do
And for the DP i should just straight pipe them but then what do i do with da o2 ?

**Nexus1155** · 04-01-2008 06:20 AM

he meant gut the downpipes and straight pipe the cat back system, either get defoulers from autozone or move o2 sensor if it isnt too much trouble, or you live close to 2000S4NY he can code the O2 sensor out of the ECU in a few minutes worth of your time

**AudiSportB5S4** · 04-01-2008 06:36 AM

when i had GIAC on my K03s, it would spike to 19PSI tapering to 15 by redline. make sure you dont have any leaks! I had tried to fix my F hose, and the line that goes past the check valve and to the motor fell off, i sucked a nice piece of metal in there and blew the shit out of my turbo! so check for leaks, then make sure everything is TIGHT! i mean plus side K04s but it happened at Xmas i was PISSED, although i got everything for xmas gifts HAHA. love living home.

**kido81** · 04-01-2008 07:34 AM

No i dont want to do a straight pipe from the cat back. i would want to get rid of my cats completely.. I would just cut the cat out and throw in a staight pipe and then still use my Borla cat back..
I dont mind moving my O2 sensor.. I have a welder so i could do it where should i position it??? I'm going to try to see if i do live close to him maybe he could also help me out with some of my other questions..
Thanks guy i really appreciate it all.. I love this place..

**The_Jerbel** · 04-01-2008 12:01 PM

There's no point moving the rear O2's if you cut out the CATS. Just have somebody code them out of the software completely, and remove them all together. If you live higher than sea level, your boost will taper lower than 15. 13psi sounds about right unless you are at sea level, no boost leaks at all, and the K03's are in good, strong condition.