DAVID,
Shouldn't you of retarded the timing due to pinging on a lower
octane fuel like LRP?? My datto with S2 electronic ignition doesn't ping on
OPTIMAX but pings heaps on LRP and undrivable with reg unleaded. But I'm
running over 10:1 CR.
Justin
> List,
> I am having some serious problems with my l20b.
> I am running s2 bluebird electronic ignition, and a bluebird carb.
> The problem started when I decided to retard the ignition a little to get
> a bit more power on optimax. This worked, however I was forced to fill
> with leaded petrol since the optimax had run out. I noticed a little
> audible detonation under load, so I advanced the ignition to compensate
> for the fuel.
> However when attempting to start the car after work yesterday, it would
> not start. I found a blocked fuel line, and blew it clean - there is fuel
> being pumped to the carb - so I assume the problem is ignition related.
> Finally I unplugged cyl no 1 ignition lead to test for spark, and the
> engine ran - on 3 cylinders. I then connected the lead number 1 and drove
> home.
> The car started to run worse and worse, with the tacho showing random
> ignition breakdown and spiking.
> -This does not change with ignition timing.
> -The battery is charged and charging when running.
> -I have swapped the ignition leads with no change in result.
> Could it be:
> -Damaged spark plugs due to detonation?
> -Damaged bosch electronic ignition coil?
> -Damaged s2 bb electronic distributor?
> -A broken wire somewhere?
> -An earthing problem?
> Any assistance in finding the cause of this problem would be appreciated.
> Regards,
> David Thompson.
>
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