Talk Morgan Forums Community The Malvern Arms Missfire on bumpy roads

>>This is a good suggestion. If the contacts are not clean it could become intermittent when bumped.You could temporarily by-pass the switch with a length of wire and some clips.<<
Yes, I have bypassed the Inertia Switch

>>I had an intermittent cough from my previous Plus 4 over bumps, and it turned out to be a loose electrical connection on the engine. And it took a long time to track down!<<

That's what I'm afraid of !

Phil - Yes, I take your point entirely, but I am now habitually jamming my foot against the side of the car to stop it moving - and the problem suddenly came on after many years with the car, so I'm pretty sure it's a fault.