Suddenly running very rough

[and.rs1800]

Hello all, not a mk1 but thought I’d ask here as I’ve been a member for ages-
My car has a recently rebuilt (last year in by previous owner) 1330 built by ML motorsport and was set up by AC Dodd after running in,ran perfectly a few weeks ago, did a little bit of work on it yesterday (took oil pressure relief valve off and replaced the copper washer as it was weeping a bit of oil,it’s got an adjustable relief valve but don’t think it’s relevant,and had a fiddle around with the hi lows) didn’t start it or drive it yesterday
Went to drive it this morning and it struggled a bit to start, then ran like a bag of shite,very rough,I only drove round the block.
Felt as if running on three pots but I pulled each plug lead off and engine note changed each time,took the fuel pipe off the carb, electric fuel pump seems to be doing its thing, oil pressure is a shade over 75 psi at cold as usual
Any ideas anyone? It feels like back in the day when I used a mini daily and the dizzy got wet !
Could the fuel have gone off very quickly? It’s got twin tanks and not been used for a couple of weeks, and I’ve not put any fuel in for about three or four weeks-always use v power or Esso supreme or whatever they call the 99ron
Thanks
Andrew

[LarryLebel]

The only times I've had enigmatic running were carb related. In one case the fuel line at the top of the float bowl was partially blocked and in the other the carb needed a rebuild. In the latter case I don't remember if there were gradually increasing symptoms but eventually my Traveller wouldn't start at all. The only indication of a problem was the carb (HIF44) was lightly damp.

[and.rs1800]

The only times I've had enigmatic running were carb related. In one case the fuel line at the top of the float bowl was partially blocked and in the other the carb needed a rebuild. In the latter case I don't remember if there were gradually increasing symptoms but eventually my Traveller wouldn't start at all. The only indication of a problem was the carb (HIF44) was lightly damp.

Cheers Larry-the HIF44 is a rebuilt one

[Joel Welsh 4769VU]

I just ran thru a problem with mine not wanting to start, and intermittent spark...

Check your coil while you're at it.
My culprit.

[and.rs1800]

Gave everything electrical a squirt of wd40,cleaned the contacts in the dizzy cap, whipped the plugs out, bit sooty and one was very wet with petrol. Seems to have done the trick.need to take it for a proper long run!!
Obviously should have done all this yesterday before posting about it