Common reasons for misfire

[Connor]

Bit of a schoolboy/ vague question but what are your predictions for a misfire on a car i bought the other week.
Its a 1200 carb
misfires bad on idle
'seems' to clear when revved up and drives fine its only when i come to a junction is misfires and the car shakes like it has a v8 or something in it lol
Changing the plugs and leads at weekend and hoping its them, but if not what do you think it may be.
I got a feeling the heads going to have to come off for a de-coke session :(
Rep to people with good answers :thumb:

[AlexW]

Not losing any water/oil? Might be worth getting a compression tester on it.

Other than that i cant think of much, give it a rag etc lol

[mowgli]

check the dizzy advance retard mechanism. if its knackered, it will give the above symptoms

plugs will too.

[Connor]

Cheers guys, going to fit new plugs and leads hopefully that will sort that
If not i will have a lil play with it

[Guderian]

i think there's at least one small bore hose attached between the air cleaner and the carb. if it comes loose (and they do come loose) it can upset slow running. Also there's the vacuum retard pipe that goes from there to the distributor, might have chafed or come off.

[draper]

plugs/leads are your first port of call gayboy

maybe the fuelling was changed to suit them wikkidy 'zorts lol

[Connor]

plugs/leads are your first port of call gayboy

maybe the fuelling was changed to suit them wikkidy 'zorts lol

Yea i know plugs and leads are going on at the weekend

And yea it may of needed extra fuel to run those twin cabbage shooters lol