Went for a little jaunt this morning - 20 miles
On the way back the engine was misfiring under load - from about 2500 rpm - and at idle. It revs but is clearly missing a cylinder occasionaly (don't you just love the occasionally" word?). If I take it up the rev range slowy, it seems smooth enough. Get a little heavy footed, and it starts to misfire. Take it out of gear, and rev it, all sounds fine....
Got home, pushed all my leads on to make a decent connection, then removed the HT leads from the plugs and refit. Car revs nicely and not missing a beat
Went to get fuel, and under load, the problem reappeared. I've had a similar issue before (but at higher revs) with a cracked rotor arm (dizzy was fine, just the arm). Running a Crane electronic igntion. I did 100+mile 2 weeks back and had no issue whatsoever.
I checked the oil while getting fuel and it was VERY low (below the notch in the dipstick) - not been leaking so think i must have been burning it... so, oh collectively wise-ones... what have i got?
An electrical problem from the dizzy onwards- never had a Crane fail so no idea if it can do an intermittent fail (ie does it either work or stop completely?)
A spark problem (although it's clearly worse under load but I would guess I am running rich seeing as the car was serviced <1000miles ago and the garage floor is not awash in oil)
A worse problem (eg something mechanical/valve train etc) that may be lack of oil related - although it seems fine when not under load?
And can it be fixed before Wednesday night!!
Any sane thoughts, much appreciated.