Had a look in the archive but can not find an answer yet. Cruising along smoothly as you can in a series 3 petrol when the engine missed a beat, then missed more under power with black smoke and backfiring. I can't drive it at all now. Will start, but with miss fires and backfires like crazy. Any advice on how to get it running smoothly again?
Black smoke, back firing, miss firing, cutting out. Help
- Thread starter LR3
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Turboman
Mab An Gov
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Are there a hoses from the inlet manifold to the distributor, and brake servo? If they are leaking they can let air into the combustion chambers and the resulting weak mixture would cause misfires and backfires. The other cause of big backfires is air leaking into the exhaust manifold which can help ignite unburnt fuel in the exhaust system.
series2steve
Active Member
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has it got a weber 34 ,cos the newer ones have a black plastic float filled with chuffin SPONGE,and we all know whats sponges are good at, so do i
X1 replace the coil. Only costs a tenner. If you do have a Weber unscrew the idle jet and clean it/ blow through. Whilst you're doing the coil check the ignition timing. I'd also change the dizzy cap, rotor arm, condenser, spark plugs points and leads. It'll all cost around £35-40.
DarrenHS3
Active Member
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cant add much other than it sounds like a chronic issue with the carb jets (blockage of air corrector or emulsion tube) need to know which carb you have to advise on that
Turboman
Mab An Gov
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- 60,151
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- Lathrowda, Kernow
