hi all,
i'm having a bit of trouble with my spark plugs.
i'm using champion n9y plugs on a 1100 unleaded engine and
the plugs are becoming sooty and engine then does not fire on all 4 cylinders.
once i clean them engine runs like a dream.
am i using the right plugs and is this happening because i don't drive the car often
thanks :

roll:

N9Y should be OK on an 1100, or any near stock Mini.
If sooty, either the mixture is rich or the ignition has a problem. How old are the plug leads, points & dizzy cap?
If all are sooty I'd suspect the carby mixture.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

hi dr
yes all plugs were sooty
i'll adjust the mixture tomorrow
note..when i take the car for a long run and remove the plugs there all clean
that what makes me think the soot is from doing short runs or
just idling the car in the garage
thanks

Either the carb mixture is set too rich or the float level is too high, I reckon.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

or he just dont warm it up enuff to run of choke
makka

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Anonymous moderation means the agro that is built up towards the mods isn't aimed at an individual (fewer "Makk" attacks). Less stress for mods means less moderator "retirements".

i had this problem

carb needle had bad marks on it
and put new gasket on breather plates (just under manifolds on the back)

now car doesnt turn off anymore,
because of plugs that are really sooty

because of plates that dont suck air no more?

fingers crossed

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Inconspicuously Conspicuous
Appreciation without Depreciation
forever chasing clearer skies...

I Would go with the Doc.

Carby has to rich of a mixture

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I've Got One
You've Got One
We've All Got One
What Is It



A Bloody Mini

1970 Mini K, 1380cc, 1.75 HIF SU, 30 70 Cam, 2" Zorts
1969 Mini K, Stock Standard and Orginal. (Slow as Hell)

Or the wrong needle..

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Stop Licking the Dog...I Don't Care Who Started It

Is the choke turning off properly?

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Chris

Everything I like is either
illegal, immoral or fattening.

Yeah there's only 800 or so of 'em now- at $20 each, which one is dead right for you?

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Dyno Time..Its just that the plugs are good after a long run and crap after short runs

_________________
Stop Licking the Dog...I Don't Care Who Started It

Bosch plugs for starters... not NGK or champion

thats not ur prob... its carby... im running with the "DR" and the boys

-Cam

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IS NOW BACK ONLINE AFTER SOMETIME..... SORRY TO ALL, FOR NOT REPLYING TO PM'S!!

the doc was right the mixture was way out- too rich-.
i adjusted it by using my colortune spark plug which i
bought years ago for use on my mgb but never used it,
also found qne cylinder not firing due to a shorted spark plug.
thanks again guys

Thank god for Ausmini, I can only imagine how many of us would have ended up forking out cash to a mechanic if it wasn't for the advice recieved here

Have you had your mini Long

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Stop Licking the Dog...I Don't Care Who Started It