yellowrscustom

my 2 wd saph is running rich,how do i adjust the mixture?do i need any speacialist tools to do it to get it right or is it speacialist only?

BigErn

Needs to go on a gas analyser mate. Dont touch it, get it done properly.

KSA-Cossie

iTrader: (4)

As above m8.

Glenn_

iTrader: (1)

The adjustment screw is on the ecu but like already said you need the car to go on a gas analiser lol.I took my car to a bloke who does 2wd rolling road segt ups and he adjusted my fuel/air mixture so that my cossie is running rich and its been like this for over 2 years now.

tabetha

Be best to put on a a new CTS before you get it done as well, if over 2/3 years old.
tabetha

Dannyf1380

What reading should you get at idle?

yellowrscustom

i can get it on a gas analyser at a mot station+then adjust it down,i am up in the northern isles+no so easy to get 2 a specialist without a long expensive ferry trip!

pa_sjo

To answer your question.. "How do I do it CORRECTLY"..

1) Speak to whoever wrote the chip, ask them what it should be.
2) Get someone with a gas analyser to set the above.

LHD220Turbo

iTrader: (4)

you can adjust the mixture on the ecu; however this will adjust it for the whole map (i believe)

what chip is in the car?

it really does depend on the chip to be honest; it needs to be below 3% CO for an MOT

for example, my MSD chip needs to have the CO at between 2.5-2.7% at idle

if you have wideband you "could" adjust the CO to below 3% and then make sure the fueling is bang on using the wideband on boost - as this is when its "most" important

Dannyf1380

What about air/fuel ratio? What should that be at idle?