Installed the closed loop conversion from MSD and look at this CO readings!! With the old chip and greens it was set at 3.5% to let it pass the MOT. But only at a higher CO value it would run ok.

Now with this new chip and closed loop it runs like a dream all through the revs, very low CO at idle and a great fuel consumption!

Thanks a lot you guys from MSD!!

http://s261.photobucket.com/albums/i...current=CO.flv

 

Another happy MSD customer nice one stu

 

How easy and whats invlolved in installation? Sounds very good, 1st mod ill be doing I think

 

i have a P8 with closed loop and coil pack for sale in parts on Blacks, with injectors and lamba, best mod i made when i had a cossie

 

I was very tempted by yours but I already have L8 and yours is a different spec so the chip would be wrong.

 

Well, you need a L8 ECU (saph4x4), the right MSD closed loop chip for your conversion and a lambda sensor. Other parts will remain the same as you already have put in. (like for instant greens or greys, 3 bar mapsensor etc.)

And it sooooo easy to setup. The software does almost everything for you. And you'll get a clear manual with the chip from MSD, it all speaks for itself.

 

What CO are you running now on idle? I havent tried my chip at the MOT-station yet and we have 0,5% CO-limit.

 

never knew you can do closed loop on P8 what about if its running pectel boards ?

 

it came from the facory with closed loop!

 

......think a saff can get away with 6%...........just cheched mine yesterday and it's 1.9%.............without cloosed loop

 

Karl's set mine to 3.5 (or so it says on the bill!) I have the MOT in 2 weeks - will it pass?

 

closed loop will normaly idle at 0.90%...

 

lets hope its just under 3.50% .....

3.51% on a pre 92 car will fail

 

mine used to be 2.5% with P8 and greys, no closed loop

 

got my chip in the post yesterday! can't wait.
on greens mine would only idle happily around the 5% mark

 

Not in here in Sweden where the green top Sapph have to stay below 0,5% CO.

 

crap chip or setup then!

any non closed loop car should aim for 2.5%....

 

at idle? or fast idle? stus stuff could easily make that...and you could use a sport cat and piss cat tests at any power level

 

i set mine up as per stu instuctions and its between 2.5-2.7% at idle i'm on l6)

if i was to go L8 and closed loop will i need to change the chip? i guess i would?

 

yes you would mate, but its worth it for 38mpg when pottering about

 

cheers

 

...........see my mot'er told me if it doesnt have a cat then it doesn't really matter......but aslong as it's 6% or less it will pass..........?????........

 

bollocks! the legal limit is 3.5%

where is it you get mots?

 

to be fair i thought the legal limit was 3 not 3.5, so happy days

 

the MOT limit is not necessarily what you should be running it at though, 3.5% is not the cleanest way to idle your engine and give oil and spark plug longevity

 

what sort of figure is it to get this done?

 

not at ll! infact 3.5% is way way more than any well set up car should ever need!

 

As you can see on the little movie that I have enclosed its now between 0,5-0,9% CO.

Same here in Holland. If the car does have a catalystic convertor and lambda sensor fitted new from factory (the green top ones, I think it's 'U9' on the car papers in Holland) then the limit is 0,5% CO.

I dont know if this value will go any lower with the MSD closed loop conversion. I havent tried to adjust the CO screw to see if it can see that value. Maybe best to ask Stu.

But If it is possible to go below the 0,5% CO then I dont know how precise it will stay there. My car has a value from somewhere 0,5% min to 0,9% max at idle, again see the movie.

 

this may be wrong, but is my understanding:

you won't be able to go lower using a narrow band lambda sensor, as it 'switches' the fuelling alternately slightly rich and lean around the 'ideal' mixture.

the only way to reduce the CO further is to have a catalytic converter

if you used a wide band sensor, it would theoretically be possible to change the point at which the mixture 'homes in' on.

 

yeah, ii found if weaker than 0.90 as stu recommends, they pick up on lambda fuelling, and surge at idle...

 

......just rang him..............yes it is 3.5%.........but he said to me it didn't matter if it was 6% it would still pass..........i just got the wrong end off the stick..............doh..........sorry mr tech.....we cant argue tonight....

 

Can you explain what you mean by this?

 

can i have the garage name?

 

well, the lambda sensor controls fuelling under these conditions by switching from rich to weak, my cossie if weak, the idle speed would rise and fall in time with the rich weak cycle...

 

Another happy customer, great news.

 

......why would u want my pals garage name when u live 400 fuckn mile away.........

 

Thanks for your answer! I now understand what you mean. Although it looks like mine has a little less then 0,9CO% reading at idle, its hasnt got this problem.

 

pete...


because i work for vosa, and would like to take his testers licence off him...

 

................u really need to get out more........

 

he needs to learn to test to the given standards...not his own....