plug lead resistance - too much of a good thing?
Discussion
I changed the plug leads at the weekend, the replacements are the standard Range Rover leads which are labelled as suppression leads. I think this is normal and and I take it to mean they have a built in resistance to suppress radio interference. As normal with a TVR/Rover V8, it also has a set of plug extenders which I think have resistance built in. I've noticed that the engine is now a bit hesitant for the first minute or so after starting from cold. I wonder if this is caused by a weak spark - is it possible I've got the wrong leads?
I've gone back to Magnicors which measure about 14K for number 8 lead. The LR ones measured 13 K for the same lead. And the coil secondary resistance was about 7K if memory serves. I guess this lot gives it a very long spark then? But the Bosch coil is allegedly high voltage (60 KV instead of 30 KV) which suggests a short intense spark. All very confusing! In any case it now idles OK and is fine under power but a bit troublesome under small throttle openings - more of a fuelling problem that spark I suspect.
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