Having to use the Derby as the 'daily' at the moment since the van is still in-operatable (it conspires that a new head is needed as the old one is cracked 
)
However - the Derby now is playing up
And I wondered if any of you guys could help? Basically it started missing last Friday on the way down the A45 to Northampton, and has gradually got worse since to the stage where now I've resorted to pedal power to get to work. When I say missing - its more like its completely cutting out momentarily then starting up again causing quite violent jerking 
I suspect its something electrical rather than a fueling problem as the 'cutting-out' is so sudden combined with the fact that when it was missing going down the A45 it actually backfired a couple of times - indicating that maybe unspent fuel was being re-ignited down the exhaust pipe? I wonder if the Coil is playing - up?
Thanks in advance for your ideas on the problem
BTW; in between the 'missing' the engine runs fine.
)However - the Derby now is playing up
And I wondered if any of you guys could help? Basically it started missing last Friday on the way down the A45 to Northampton, and has gradually got worse since to the stage where now I've resorted to pedal power to get to work. When I say missing - its more like its completely cutting out momentarily then starting up again causing quite violent jerking 
I suspect its something electrical rather than a fueling problem as the 'cutting-out' is so sudden combined with the fact that when it was missing going down the A45 it actually backfired a couple of times - indicating that maybe unspent fuel was being re-ignited down the exhaust pipe? I wonder if the Coil is playing - up?Thanks in advance for your ideas on the problem
BTW; in between the 'missing' the engine runs fine.
) Turn the engine over and see if you get a decent spark. It should be able to crack a 10mm long spark pretty easly normaly. If it cant its probably a dead coil. If it can its probably leands or dizzy cap/rotor.
Though changing these made no difference. The Dizzy cap and rotor arm both look in good condition. 
So resorted back to the 'trial & error' method
