I need information about %CO at idle, I have boost max 0.65 bar. I cannot set mixure without that information. some people told me that 0.8 is enougt, some told me that I must have 1.7 minimum!

 

I thought 2.5 was about right.

 

??

why in manuals write : 0.5-1.1 %CO at idle . i set 0.95 this is too lean??

 

I'm not 100% sure but I was told that 2.5 is about right for the %CO at idle as mine was 3+ and it needed to be turned down for the MoT.

 

the average fo a car of that age is around 2.0ppm so being a turbo i would set it slightly higher

 

ok. will I drive on lean mixure 0.95, is this bad for engine? knocking... ?

 

too weak can be just as bad as too rich, get is sorted soon as

 

too weak can be just as bad as too rich if not worse, get is sorted soon as

 

ok. why then manuals said 0.5-1.1 % ?

 

mines running 3.4% was told to set it that much to be safe, is that too much?

 

If you not 100% sure on what your doing take it to someone that do know because as said to rich can be just as bad as to lean. I know id rather pay and have it done properly than DIY it and end up with a fucked engine

 

richy: who told you to set it at 3.4? just ask.

I have about 0.9

 

surley it depends on if the car is standard or you require more fuel as i thought MFI was a rising rate as the engine speed goes up?

i run 3% on idle and see very good AFR at the top end right to the limiter , this is on 18psi running around the 180hp mark

 

The amount hat the idel mix generates to a running engine at full chat is insignificant.
The reason for the lean settings is to please eco warriors, it does not work though.
Set it at 2/2.5%, and it will be a world of difference, even if set at 0.1 it will do no harm just drive like a bag of crap low down.
If you imagine the air going into your engine at ilde then at full throttle you will see what I mean the idle cicuit and co is nothing to do with main running and will have next to no effect
tabetha

 

You mean CO setting is only for idle?? and if it is lean , it is lean only at idle??

thanks

 

well i am booked in for a R/R next week and i want mine set at about 2.5%

 

Idle CO is just that does not affect the main CO much at all, but as it adds to it it will have a very small effect, and very small it is.
If you imagine the air demand at idle and WOT you will see the point.
It will have a noticeable effect at low rpm low demand, much more responsive at 2/2.5% as it is running much closer to idle type air flow conditions, so percentage wise has more effect the lower the air flow.
tabetha

 

mine have always been set to 3% and never leaned out

 

Is possible that car going slowly because of 0.9 %co idle? I have problem with lower revs , car is not pulling good

 

Mine was 4.3% and passed the MOT yesterday, is that right, or have I read the reading sheet wrong?

 

its a tad high but it'll pass emmisions cos old emissions dont really give a fook

newer cat equipped cars need to be under .3% which is a cont when they were made to run .5% (missuses escort for 1) bastard gov messin about makin us buy cats and oxy sensors before we really need em

 

My dads mate who replaced the headgasket said to run it that much. runs cooler?!?!? Its had a stage 2 upgrade and boosts at 16psi. i have noticed that since its been set at that mixture as u pull away and the revs are quite low it does bog down alot but pulls really hard higher up the revs as the turbo winds in (but thats set by ecu isnt it?!?) its CRAP on fuel since the rebuild too its terrible! So it should be ok to set it at bout 2.0%???

 

i didnt understand your post too mucj, I am bad english speaker

U mean that I must put about 2% and car will go better?