Mondial QV misfire pop and bang

When mine started popping and banging, it was one of the coil packs breaking down. It started up fine but after a few miles it started missing- advice from dealer was to run car until it started missing, then jump out and compare the 2 coil pack temps by hand, if one was hotter - then it was heating up and breaking down. Temp difference was noticeable and once changed it was fine

 

Another factor creating pops and bangs on a K-Jet car is vacuum advance - more specifically, lack thereof. If there’s a vacuum leak on the hose to the Digiplex boxes, or the vacuum control of the Digiplexes has failed (either one or both), then the ignition timing will be quite retarded and there will be more unburned fuel exiting the exhaust valves when the throttle is closed on deceleration.

Gordon

 

Hi guys,

Resurrecting this thread as I’m still having issues, moving house put the car on the back burner but need to get it sorted.

so I’ve had it at a specialist who changed the leads for the rear bank and found the fuel distributor was at fault, it’s now been rebuilt by a company in Germany but still isn’t running well, it won’t rev but when you push down on the pressure plate while you rev it’ll rev cleanly, what could cause this?

i tried removing the vacuum for the brakes to test that wasn’t causing a leak but no change.

Any ideas?

Driving me mad

Tia
Alex