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hello folks, law a tune up on mine MGA 1600 prior to the journey to MG2016 (about 800 miles). The vehicle is to run great, plugs are a nice light brown color. Check the points space I noticed that it is bigger than spec, more than likely .022 vs. .014-.016in spec. What is the result of having actually points gap too large. In particular, could it be a misfire at 4500 RPM in fourth gear because that is what I competent yesterday. The wouldn"t misfire at 4500 in 3rd gear, i took it up to about 5200 RPM and also it to be smooth, but of course, the engine is working nearly has difficult in third as it is in fourth at those speeds. Thanks,Russ
I"d say it pushes your timing forward a bit. By opening the gap, you"re making them open sooner and also close later. Over there are more than likely other considerations, such as permitting the coil sufficient time come charge.

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Too wide a allude gap to reduce the dwell angle. This walk not give the coil sufficient time to charge, causing a weak spark. It also slightly retards the timing. In short, either too vast or small a point gap will cause a misfire under load. I recommend setting your point gap through a feeler gauge and also fine tuning through a dwell meter. After ~ you room satisfied, collection the ignition timing.Edit: Too wide a allude gap walk indeed breakthrough the timing. Sorry, on mowing break prior to the rain sets in.
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Too large a void does certainly decrease dwell/coil saturation time. Yet it actually advances, no retards, the timing, due to the fact that points open sooner...One of the reasons a car needs a routine tune-up is since the rubbing block ~ above the points wears end time, hence decreasing the suggest gap and therefore retarding the timing. That"s among the factors a auto seems to operation so much much better after a tune-up -- because the previously-retarded timing has been revived to ideal spec...Dick
In answer to # 3280826 by jdtaylor014 Too wide a suggest gap decreases the dwell angle. This does not provide the coil sufficient time come charge, causing a weak spark. It also slightly retards the timing. In short, either too vast or small a point gap will cause a misfire under load. Ns recommend setting your point gap through a feeler gauge and fine tuning v a dwell meter. ~ you room satisfied, collection the ignition timing.
thanks folks, readjusted to .016", automobile still runs fine, haven"t had actually a opportunity to see just how it does at 4500 RPM in fourth (I don"t journey that fast in mine neighborhood).
Really? 50 more hp and more hair? DickErrabundi Saepe, Semper Certi(Often wrong, but always certain)
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lessened dwell isn"t really a large issue in a 4 cylinder through 60 levels of dwell time. That"s why you"ll only notice a tiny loss that spark at high rpm in 4th. I set points at .017" or so, come gain an ext time between adjustments. At the setting, there room no remarkable losses in spark output.jeff
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