paulbstiv3

fitted a down pipe to my 97 sti at the weekend. now when accelerating hard it splutters and wont pull. its worse when the engines cold! any ideas?

andy97

iTrader: (1)

Go over everything you did, checking for leaks or damage connections, you could of knocked something off whilst fitting

jay666

need a re-map mate.
i have a sti 5 and i had the same prob.
nothing a grand wont sort out!!!!

kingofturds

iTrader: (1)

sure you didnt **** the lambada? do you have any pretty red flashing lights on the dash?

paulbstiv3

No lights on dash, just sometimes spluttering when on boost.Could it be overboosting ?

New_scooby_04

iTrader: (4)

IIRC when overboost occurs, the ECU activates the fuel cut, which by all accounts feels like you've run into a wall! stuttering doesn't sound dramatic enough. Does sounds like a Lamda problem.....are your plugs ok?

Classic Stis don't like decats without a remap, though, I'd get that done as a matter of priority, at the very least, you'll get more from your mods. I hope you've also got a knocklink.

Ns04

jameswrx

iTrader: (4)

echo the lamda idea

To check it just unplug the wiring connector to it, if it drives ok then it's fubbared

paulbstiv3

Fitted a set of denso iridium plugs today, seems to have cured the problem.

scoobfan

Good man, well done for posting the outcome, not many do !!

Rob