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Author Topic: Bloody emissions  (Read 1946 times)

Offline Mk2Kezza

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Bloody emissions
« on: 06 October 2010, 18:40 »
Right.
Recently had an MOT and it failed on the emmisions - Hydrocarbon content too high. Probably my fault as I timed up the engine and messed about witht the mixture. Anyway, had the car tuned on Monday night, CO was 0.1 so as I expected, she was running lean, hence high HC content. The dude, tuned her so she read 1.9 % CO, yet she bloody failed the MOT tonight again! This time the CO was 4.5%....

Any idea why it has shot up in two days? Only done about 50 miles in her.

She's an 1.8 8V digifant (1990).

Grrrr, bloody car :-(
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Offline clipperjay

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Re: Bloody emissions
« Reply #1 on: 06 October 2010, 19:01 »
Had a simular issue with a 8V and was scratching my head and it was a simple issue the idle screw and co adjuster had threaded due to the owner kept mucking about with them and they eventually started to move about by themselves after driving. To prove this all I did was stick tippex at one point and told him if this mark moves you die!  :wink: He came back and it had vibrated loose again!
So check both screws have no play if they do you might want to change the adjuster screws then drop some lock thread on the edge to seal it up.
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Offline Ben Lessani

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Re: Bloody emissions
« Reply #2 on: 06 October 2010, 21:49 »
Did you try slipping the MOT tester £5 ... I've found that usually solves emissions problems :rolleyes:
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Offline mwep201081

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Re: Bloody emissions
« Reply #3 on: 06 October 2010, 22:05 »
I've always been told to give the car a good hammering before the MOT test to help with the emissions....dunno if it does anything but I've failed on many things but never emissions!

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Offline Mk2Kezza

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Re: Bloody emissions
« Reply #4 on: 07 October 2010, 08:30 »
I'm off back to the tuning station lunchtime to get her tested again before tkaing her back for the retest after work.. Such a pain, as ironically, since being tested she is running like a dream!!

Cheers lads, i'll let you know how she gets on later.
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Offline rubjonny

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Re: Bloody emissions
« Reply #5 on: 08 October 2010, 14:52 »
when the co was fiddled with was it done properly as per the digifant tuning guide? cant just mess with the screws
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Offline Mk2Kezza

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Re: Bloody emissions
« Reply #6 on: 08 October 2010, 17:47 »
Well, she passed! The dude was not there lunchtime but I messed with the mixture screw and lowered it at the MOT station.

RJ, the dude who tuned it ignored your tuning guide and literelly fiddled with it in front of my eyes!

Needless to say, i've no idea whether she is running right, however I have another years ticket to ride!
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Offline rubjonny

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Re: Bloody emissions
« Reply #7 on: 08 October 2010, 19:34 »
have to get it rechecked as per the guide, it'll never be right if you just mess with the co screw
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Offline Mk2Kezza

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Re: Bloody emissions
« Reply #8 on: 09 October 2010, 11:24 »
I agree, the only problem being is I have not got a CO tester and its becoming increasingly more difficult to find someone with a meter who will acutally listen to the right instructions!

Are the gunson ones any good?
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Offline Mew

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Re: Bloody emissions
« Reply #9 on: 09 October 2010, 11:40 »
Quote from: Mk2Kezza on 09 October 2010, 11:24
Are the gunson ones any good?

Not worth buying one
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