mtb989s

iTrader: (1)

I've got a couple of questions for you tech guys.

I have 3 codes from my check engine light.
PO171 System too lean
PO174 System too lean
PO430 Catalyst Efficiency Below Threshold

Any ideas what's wrong? I assumed something with the O2 sensors or the cats, but I don't know exactly what it might be.

Also

I have 2000 WS6 with a whisper lid, TB bypass, IAT timer, ported MAF, KN filter, smooth bellow, ravin exhausts.

I was wanting to put on edelbrock shorty headers with the slp y pipe, remove cats, 85 MAF, and Hypertech programmer.

Would this be a good investment to gain some horsepower? Does anyone have close to the same setup and how much power do you get at the wheels?

Thanks

TAQuickness

iTrader: (28)

take a look in the tuning section. there is a sticky that will give you a little better description of the codes. once you determine what bank is throwing the codes, you can replace the respective O2 sensors.

TAQuickness

iTrader: (28)

If you going to invest into headers, you might try looking for a deal on LT's instead of shorty's. It's roughly the same amount of work to install the headers, and the LT's will yeild much better gains.

I wouldn't mess with the MAF. The MAF is a delicate instrument and not the eaisiest thing to tune. Your stock MAF will be more than adequet for the mods you are planning.

As far as the Hypetech - they are not totally useless, but you would be better off saving up a few more bucks and buying a full blown tuning software such as EFILive/Flashscan (more info: in the tuning section and www.efilive.com).