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Oct 24, 2003 | 04:03 PM

7th Heaven

Thread Starter

Senior Member

Joined: Sep 2003

Posts: 121

From: Pekin, IL

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?

Oct 24, 2003 | 04:38 PM

Cooper

Member

Joined: 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.

Oct 24, 2003 | 05:27 PM

GASOLINE

Junior Member

Joined: Sep 2003

Posts: 22

From: Orange County

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

Oct 24, 2003 | 05:41 PM

turbovr6

Senior Member

Joined: Nov 2001

Posts: 4,981

From: NJ

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