15 replies to this topic

[mozzo1]

when i bought the car it was spluttering and id forgot all about till i resently started it up as checking everything ready for mot, i put new dizzy cap and rotor arm on as these where really bad but no difference in running, the points look fairly new with nice clean contacts. any idea what it could be. its a mayfair 1000 1992 model it has the lucas type dizzy

[Kernal H]

Are you sure you've got all the leads on the right way? I stupidly did this once and it spluttered lots. Otherwise could be that your points arn't adjusted correctly, too large a gap and there'd be a weak spark but the points would look ok

Have you looked at the spark plugs? They could tell you if any one cylinder isn't firing...

Alternatly, take a look at everything in the dark. If you can see any blue light/sparls then find out where it's coming from and replace it.

[mozzo1]

Are you sure you've got all the leads on the right way? I stupidly did this once and it spluttered lots. Otherwise could be that your points arn't adjusted correctly, too large a gap and there'd be a weak spark but the points would look ok

Have you looked at the spark plugs? They could tell you if any one cylinder isn't firing...

Alternatly, take a look at everything in the dark. If you can see any blue light/sparls then find out where it's coming from and replace it.

i put them back on the ones they came off but it was like it when i got it so ? left to right looking at the engine the first lead goes on the left second goes on the top third goes on the bottom and last one goes on the right , do you know if this is right

[Retro_10s]

the cylinder firing order of the mini engine is 1-3-4-2

How do you know this is electric related? have you tested everything with a multimeter?. It could well be that the needle valve in the float chamber lid needs cleaning/replacing.

[1984mini25]

And number one cylinder/spark plug if from the radiator/water pump end of the engine.

[liirge]

If its only after 3000 Rpm, could it be fuel related, as if there isnt enough fuel to keep up with the higher revs

[taffy1967]

Perhaps the condenser also needs changing?

[mozzo1]

is stripping the carb an easy job and what oil will i need to to up that bowly looking thing and also does any one have a picture of the needle valve as i dond know what im looking for,

[mozzo1]

the cylinder firing order of the mini engine is 1-3-4-2

How do you know this is electric related? have you tested everything with a multimeter?. It could well be that the needle valve in the float chamber lid needs cleaning/replacing.

to be honest mate i aint got a clue what it is i just put it down to that but thinking about it it does sound like it could be something to do with the carb

[taffy1967]

I use 10W/40 oil in the carb dashpot. (20W/50 Duckhams Q Classic for the engine though)

[lovethemini]

Not a mechanic but I had a problem with mine and it sputtered alot in higher revs but not in low revs. I was told to check the points. Checked the gap with feeler guages and it sorted the problem. Not sure of the exact gap for the type of engine or distributor you have but I was told .0015 gap. It worked for me and save me money.

[AzMaN]

couldnt it also be timing related? i.e dizzie been nocked and moved?

Edited by AzMaN, 18 November 2008 - 10:25 PM.

[dklawson]

Always start with the mechanical and ignition adjustments before considering carb adjustments.

Inspect ALL the ignition components. Are the plug wires cracked or brittle? Are there cracks or carbon looking lines on the dizzy cap and/or rotor? Are the plugs badly carbon fouled? Replace any suspect parts.

With the engine cold set the valve clearances (0.012" if stock ratio arms).
Remove and dress or fit new points.
Set the points gap. As stated above 0.015" or 0.016" is correct.
Once those items are addressed, set the static timing and start the engine. Set the final timing by light if you have one.

If these steps haven't addressed your running problem, fit a new condenser... just because. If that fails to address the problem, THEN move on to the carb.

[icklemini]

check coil and its connections too... loose connections here that are vibrating at higher engine speeds cause a spluttering..

ta,
Dave

[mozzo1]

i have no idea what it was i checked every thing electrical dont know a thing about carbs so i brought a can of carb cleaner but on the way home from shop with the can and it fixed itself and can rev right through red line now, not that i"ll make a habbit of it. so i used the carb and intake cleaner any way and runs like a dream now. thanks for everyone input as any probs in the future i will know where to start now so thanks again guys