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10-24-2003, 04:03 PM

7th Heaven

Senior Member

Thread Starter

Join Date: Sep 2003

Location: Pekin, IL

Posts: 121

After replacing the pre cat with a downpipe, exhaust, adding a cold air intake, is my car going to run lean? What can I do to prevent this?

10-24-2003, 04:38 PM

Cooper

Member

Join Date: Oct 2003

Posts: 61

It should be fine. Remeber the 3 mod rule! I doubt your car will run that lean at all, if your worried and dont have the cash to buy an ECU just run a little bit higher octane fuel.

10-24-2003, 05:27 PM

GASOLINE

Junior Member

Join Date: Sep 2003

Location: Orange County

Posts: 22

from what ive been reading youll be alright as long as your mods dont make you go past 10psi. after 10 psi the stock computer isnt as good anymore

10-24-2003, 05:41 PM

turbovr6

Senior Member

Join Date: Nov 2001

Location: NJ

Posts: 4,981

the downpipe can cause boost creep. Watch your boost gauge when you drive. If it goes past 10 psi it's time to buy an ecu, or a boost controller. Really you should get both anyway