Ignition timing problem

R

restojon

New Member
I've been struggling to time up the ignition on the 2000SC, the problem is if I use the timing marks on the front pulley the engine runs very rough and will not idle with any sort of stability, I tried to use the flywheel marks but they are a mile off. I checked the flywheel against the rotor arm and when on the mark the arm was facing the O/S wing inbetween the two contacts. I've now timed it by ear and I seem to be pretty much in the right area even though the crankshaft pulley marks say I'm running about 28deg adv, does anybody know why this is happening? I don't know if the engine has been apart in it's life and had the flywheel put back in the wrong place likewise the crankshaft pulley but that would be the only explanation I can muster up to explain it.
Any help or ideas would be greatly appreciated, thanks.
 
Neither the flywheel or the front pulley can be put back in the wrong place. There are a couple of other possible causes, either the distributor advance mechanism is seized, but that would generally make it OK at tickover, but cause a lack of performance as you rev up, or the the cam timing is out which would necessitate you altering the ignition timing way out to get it to run properly. I would peg up the crank and cam as a first check to see if the cam timing is incorrect.
 
I'll have to check out the cam timing I think, anytime I time it up to the marks it only barely ticks over and the engine shakes violently, the only other thing that crossed my mind was if the pilot circuit on the fuel side could be at fault as I run the car low on fuel about a month ago and a load of crud was pulled through. I did clean out the pump and float bowl and cover the inlet of the carb whilst running to try and dislodge any blockages but I'm not really versed in these SU carbs yet, I've come from fixing motorcycles so the fuel systems are somewhat different to what I'm used to. I'll definitely check the cam timing though.
 
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