I would agree if the OP said this happened after driving in the rain as the
engine area gets wet from splashing. But every car I've owned the engine
area stayed dry when sitting there, even if raining.
Unless you are saying the increased humidity of nearby puddled water was
enough to make the plugs and wires act wet.
I'd be looking more towards a more sensitive component than the plug wires
you could get enough of a temperature change from a rainstorm to cause
condensation under the hood on plug wires or dist.cap.,particularly when
combined with the higher humidity.
If the HV is leaking away,it's not going to ignite the cylinder charges.
causes for no start;
no fuel/too much fuel
no spark/spark not getting to plugs(going elsewhere)
just general humidity can be a severe problem on ignition systems if
maintenance is not performed properly. this is because sweaty hands
leave salt residues. salt is both a conductor and hygroscopic. this
can easily create either full or partial conduction paths to earth for
the spark current.
ignition systems should always be worked on with gloves. all sensitive
components like plugs and distributor caps, especially rotor arms,
should be carefully be wiped clean with a clean lint-free cloth prior to
on a side note, never clean spark plugs with a wire brush - it leaves
metal residue on insulators which has much the same effect of creating a
conduction path at high voltages.
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