stevecossy

I have a 91 saff 4x4 cossy red top, its running stage 3 on greens.
Had a prob which is now fixed but want to check/ adjust Co, im told differant things. Some say set it to 1-2% on idle others say between 3-5 so im not sure now and need some help.
Maybe i can see what shes at and then take readings over various rev positions to see if it goes weak or rich, worried if wrong i hole a piston if weak or bore wash on idle if rich. Cheers for any help. Steve

iansoutham

Another option could be to go closed-loop. Much better, guaranteed pass on MOT for emissions (provided lambda sensor is functioning) and SO much better reponse and general driving.

mechanic28

iTrader: (5)

stage 3 cossie as generally set between 2.5 too 4% depend on hoe the car runs but in general most are ok between2.5 to 3.56%

stevecossy

Ok cheers guys, had co checked today was 5.5% so ive adjusted it to about 2.5 ish. seems to go ok now.

JTECH James

iTrader: (13)

more importantly you have now taken a percentage off your fuel map so check the fueling at peak boost or a meltdown could be on the cards

stevecossy

Ok cheers. When i raised the revs it went to 0.8% at 1st then as i raised revs more it seems to richen itself up. Suppose i should take it on the rollers 4 a proper set up.

JTECH James

iTrader: (13)

or get a wideband on it you cant simulate boost fueling without making boost needs to be it done on the rollers or on road

Yura

what AFR is good at st3 at max boost, 12-12.5?
thanks!

JTECH James

iTrader: (13)

ask whoever wrote the chip mate.....to risky to guess