St205 De-cat

[col st205]

Hi im looking for a bit if help i put a aussie style de-cat on my st205 but its running rich i was told a fuel pressure regulator would stop this ??? any help would be great thanks :(

[ajcluck]

what size of decat have you got on? if it is 3" you have to be careful of boostcreep!

have you upgraded the fuel injectors?

induction kit?

as my understanding is that if you upgrade your decat to a 3" there is more change of it running lean!

[col st205]

what size of decat have you got on? if it is 3" you have to be careful of boostcreep!

have you upgraded the fuel injectors?

induction kit?

as my understanding is that if you upgrade your decat to a 3" there is more change of it running lean!

i have a 3" one on it bought it off a lad thinking it was a simple upgrade have a hks mushroom filter but dont have it on it and didnt upgrade injectors i want to keep it standadrd with just a few suttle mods

[GTForbes]

is it a 3" exhaust or just decat on it? if it's a 3" exhaust you'll risk boost creep but if it's 2.5" or less you'll be ok.

who has told you that it is running rich? these cars run rich as standard but if it's using more furl than normal then something could be wrong, any error codes?

[paulgtt]

You'll also need an aftermarket ecu to run bigger injectors