92 1.6 Oil Filler Cap question
Discussion
MX-5 Lazza said:
But oil does not transmit electricity. I've seen cars that had leaky cam-covers so bad that the spark-plug wells were full of oil but the car didn't so much as misfire!
If your car is misfiring it's more likely that you have dodgy HT leads. The oil is a separate problem.
What do you mean by "oil does not transmit electricity"?If your car is misfiring it's more likely that you have dodgy HT leads. The oil is a separate problem.
New HT leads, and it was fine until they've been contaminated too. The old ones had oil at the bottom, when removed them, in a couple of cylinders.
New plugs as well.
It's a toy for me, so I don't use it that often. It only misfires when left for a day or more, and then only for a few seconds. Made me think whatever the contamination is, oil, water, whatever is being burnt away.
Hovis said:
If it only occurs after being left for a while, and then goes, I'd say it's more likely that your leads are going (or at least one of them is) high resistance, or the insulation is starting to break down. Once things warm up, slight HR or Low insul can disappear. Swap the leads and see it disappear!
Like I said, it's brand new leads, same problem. 
It literally lasts a few seconds...
HRG said:
Next time before you start it pop the plugs and clean the leads etc. If it doesn't misfire that'll confirm if it's the problem or not.
This is what is leading me down that route...Swapped the leads was fine starting from cold, not been used for 48 hours.
Started it up a couple of days later, misfire reappeared.
Had already changed the plugs. Puzzling.
ETA: HRG? Didn't realise it was you Rob.
Edited by magic torch on Monday 31st March 19:14
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