|
|
Post by thereddwarf on Aug 10, 2008 21:44:51 GMT 1
my mini is a nightmare..... its failing the mot on emmisions, the first time cause the head was stuffed, the hydrocarbons were excessive when she was revved, so got the old head reconditioned.....fitted new head gasket again and got her running..... she went back for mot and still excessive hydrocarbons....so off to the crypton tune....he said the problem was carberation so we get a newish carb and put her on.....to me shes sounding fine but its back off to the mot center tomorrow for another fail  any ideas as to why she`ll be failing....we`ve done so much work on her and getting nowhere. |
|
taffy1967
turbo
Forum cagoule
'1959-2000 Original & Best'
Posts: 4,345
|
Post by taffy1967 on Aug 10, 2008 21:50:13 GMT 1
What are the figures for it? It's usually only the injection Minis that get grief come MOT time, so is the MOT tester being too picky?
|
|
|
|
Post by thereddwarf on Aug 10, 2008 21:53:02 GMT 1
at first the idle was ok...but on reving it went up to 4000??
next time the idle was high as well....thats after the head change ect....seems the carb wasnt cutting back....but not sure if having a new carb has sorted it
|
|
ljonez
turbo
Built not bought
Posts: 3,734
|
Post by ljonez on Aug 10, 2008 22:09:28 GMT 1
excessive HC is usaly caused by oil being burnt, a easy way to reduce them is to remove the oil breather pipe from the carb and block the hole then stick the end of the pipe into a catch tank ( read as beer can) or hide it down the back of the engine just for the MOT  also either replace the air filter or clean it depending on what type you have |
|
|
|
Post by thereddwarf on Aug 10, 2008 22:11:33 GMT 1
the air filter is nearly new.....cone type thing....
as for oil....my old carb was drinking oil from the dash pot....so possabily that?
|
|
ljonez
turbo
Built not bought
Posts: 3,734
|
Post by ljonez on Aug 10, 2008 22:20:36 GMT 1
yeah that would not have been helping, might be worth disconecting the breather to give it as much chance as posible, i had to do it a few years back on my old engine and it worked a treat
|
|
|
|
Post by byron101 on Aug 10, 2008 22:32:39 GMT 1
 cheers mate, will do aswell as lots of preying
|
|
|
|
Post by silversaxo on Aug 10, 2008 23:24:21 GMT 1
in a nut shell , hc mean unburnt fuel 1 , worn carb needle 2, worn rings or bore 3, weak spark at spark plug is the mini carb or injection
|
|
|
|
Post by thereddwarf on Aug 11, 2008 9:06:21 GMT 1
it was injection...but because some silly person (me) fried the injection system its now on carbs....
the electric side of things is fine....was crypton tuned on sat and he said its all running perfectly on that side of things...
oh well.....fingers crossed cause shes on her way for her 3rd fail in a row...!!!!!
|
|
|
|
Post by minichick on Aug 11, 2008 10:05:56 GMT 1
Fingers crossed for you Ju  |
|
|
|
Post by byron101 on Aug 11, 2008 15:03:05 GMT 1
 yep 3rd fail in a row, well p-ssed of with sooty + getting closer + closer to that 3rd degree grindaside. emmisions not only failed it gone up even higher gonna re-check tappets + take to another mot station
|
|
taffy1967
turbo
Forum cagoule
'1959-2000 Original & Best'
Posts: 4,345
|
Post by taffy1967 on Aug 11, 2008 21:47:19 GMT 1
If it went up to 4000 then the carb spring might not be returning properly?
My sisters old 87' Mayfair was like that, but we had it crypton tuned and the mobile tuner marked out the spring and told us to press it down whilst the car was idling.
That way the emissions were well within the allowed limit.
|
|
|
|
Post by byron101 on Aug 11, 2008 22:02:56 GMT 1
done like lj said with pipe + replaced carb aswell, went back this morning + it 6000 ( even more now ) totally p-ssed off gonna try + slacken tappets off a bit as think might have done too tight as this can apparently cause the prob with the fuel coming out through exhaust p.s did i mention lots of preying aswell |
|
cheers mate, will do aswell as lots of preying
yep 3rd fail in a row, well p-ssed of with sooty + getting closer + closer to that 3rd degree grindaside. emmisions not only failed it gone up even higher