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General => The garage => Topic started by: Deefadog on 21 July 2005, 20:39

Title: Setting the C0!
Post by: Deefadog on 21 July 2005, 20:39

Ok, may sound like a stupid question  :embarassed:, but if i want my C0 set correctly to 2% (tried myself with no joy) is it just a case of taking it to a garage/MOT centre and they just put the exhaust analyser thing in the exhaust and set the mixture screw to get 2% showing up on the screen?

Title: Re: Setting the C0!
Post by: dan7 on 21 July 2005, 21:50

yes. i took my 8valve to a vag 'specialist' only yesterday to sort out my thirsty, stalling noisy mk2! he was there for 1 and a half hours and he said that my mixture was something like 0.13 where a brand new car runs around the 0.15 mark!! he couldn't set the rest of the stuff as everything else has seized up!!! but, in answer to your question, that's all that is needed. :wink:

Title: Re: Setting the C0!
Post by: Deefadog on 22 July 2005, 07:04

Cheers Dan,

I thought so  :rolleyes:

I'll get this set right first, before i start messing around to much!

I got the revs idleing now between 960 - 1020 (which is the recomended) but when fully warm she still sounds like she is hunting the engine still is not smooth! so i am hoping a C0 adjustment will sort this!

Cheers

Title: Re: Setting the C0!
Post by: Deefadog on 22 July 2005, 09:35

ok, got her booked into a friends place this afternoon!

now should the red lead be disconnected and the breather hole blocked? when setting the C0,or is it because he is using the emissions machine this is not needed?

Title: Re: Setting the C0!
Post by: rowlers on 22 July 2005, 13:25

Just done it!

purrs like a kitten now, took them about 20 mins!!!

Title: Re: Setting the C0!
Post by: Deefadog on 22 July 2005, 13:37

Did they use the emissions machine? if so did they take the breather off and disconnect the red lead?

Title: Re: Setting the C0!
Post by: rowlers on 22 July 2005, 18:18

yeh they used an emissions tester/analyser.

Couldn't tell you if they disconnected the breather and red lead or not - sorry!

Title: Re: Setting the C0!
Post by: Deefadog on 22 July 2005, 18:30

No worries, got it done and they don't disconnect! :)

Anyway, do you know what they set your C0 to? mine was at 0.15 (very lean) but best was at around 0.80 and it runs very nice now!

But i have been told from the experts here that it should be set to 2.0% - i don't get this  :laugh:

Title: Re: Setting the C0!
Post by: rowlers on 23 July 2005, 14:02

I asked the guy to set it at 2%, as advised by all the experts here.

So I assume that is what it is running at now - but can't be certain!!

Title: Re: Setting the C0!
Post by: Deefadog on 23 July 2005, 14:05

I which i had one of those analyser machines! code really have a good play :)

Title: Re: Setting the C0!
Post by: Gambit on 26 July 2005, 08:56

red lead disconnected. breather hole blocked up, & set to 2.0%

Title: Re: Setting the C0!
Post by: Deefadog on 26 July 2005, 10:29

Gambit - Should the red lead disconnected. breather hole blocked when it's being set up on an emissions analyzer?

If so i'll have to go back as they did not do this??

Title: Re: Setting the C0!
Post by: Gambit on 26 July 2005, 13:08

car has to be fully warmed up, breather & red wire disconnected before u can set it properly.

Title: Re: Setting the C0!
Post by: Deefadog on 26 July 2005, 13:52

Ok thanks, i'll take it back friday and get them to do it properlly, with the hose disconnected and blocked and red lead disconnected!

Like i said, i was told on another forum, to raise the idle to 1000 with the red lead disconnected first before setting the C0, the re-set the idle when red lead connected - Heard this before?

Title: Re: Setting the C0!
Post by: rubjonny on 26 July 2005, 18:38

I have a CO meter if anyone wants to have a fiddle, I live in Bracknell  :smiley:

Title: Re: Setting the C0!
Post by: Deefadog on 26 July 2005, 19:14

Would you post it mate?

I'd cover all cost of course!

PM me!

Title: Re: Setting the C0!
Post by: rubjonny on 26 July 2005, 20:29

Only if you promise to send it back :grin:

But surely after postage either way you could just pay for a garage to do it?

Title: Re: Setting the C0!
Post by: Deefadog on 26 July 2005, 22:30

True  :grin:

I'll see how it goes on friday, hopefully i can get the garage to sort it!

But i would rather do it my self, you take time and get it just right!

I have no idea how big it is (ooooer). will it cost alot to post? If it will cost me a total of £20 in postage then i don't mind paying!

Title: Re: Setting the C0!
Post by: rubjonny on 27 July 2005, 08:14

The box is about the size of a shoebox, but it is actually really light so wont cost a huge ammount.  I recon they could have made the thing the size of a multimeter, but that wouldn't justify the cost of em new so they made a big impressive plasic box filled with air and an LCD on the front :grin:

You'll have to wait till after this weekend cos I want to have another go at settin the CO, just to make sure I did it right last time :)

Title: Re: Setting the C0!
Post by: Deefadog on 27 July 2005, 08:36

Excellent!

Let me know!

Title: Re: Setting the C0!
Post by: rowlers on 27 July 2005, 11:52

where did you get that CO meter at i want one!!! :grin: :grin: :grin: :grin:

Title: Re: Setting the C0!
Post by: rowlers on 27 July 2005, 11:53

sykes co meter on ebay!!

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=30922&item=7989281684&rd=1&ssPageName=WDVW

Title: Re: Setting the C0!
Post by: rubjonny on 27 July 2005, 12:13

Yup got it off ebay, mines a gunsons digital meter, do a search for "gunsons" "gunson's" and "gunson" ;)

Got it for slightly cheaper than £450 too  :shocked:

Title: Re: Setting the C0!
Post by: Deefadog on 27 July 2005, 20:45

Ha ha!

I just got a gunsons digital meter off ebay for £30 :) There £99 in Halfords, although i have bought an earlier version, but as long as it shows my C0 i don't care. And it will be helpfull on other cars around the family and the future!

Cheers rubjonny, just save youself a trip to the post office  :grin:

Title: Re: Setting the C0!
Post by: rubjonny on 27 July 2005, 20:49

Nice one thats how much I paid :grin:  Its green with a digital display on it yeah?  If you need the manual PM me as I got it in PDF format.

Oh and 1 tip for you, make sure you put the meter in fresh air and not directly behind the exhaust, took me a while to figure out why I couldn't get my CO below 3%  :laugh:

Title: Re: Setting the C0!
Post by: Deefadog on 27 July 2005, 21:00

That's good :)

yeah it's dark green plastic with a red led, it dark green, the newer ones or the proffesional ones are light green, from what i can make out!

I'll remember that tip :) - i know what my C0 is now, so hopefully this on is calibrated ok :)