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yokomomr4bx wrote:The only other thing I can think of is water collecting around the connector between the coil and the primary lead, bit of a dead spot for water dripping down, but if that were the case I would expect it to cause issues after every rainfall.
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I agree, if it was water related you'd normally expect the same problems every time after heavy rain, as can be the case when the outer plastic is cracked on the coil.
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If you continue to have problems, it might be worth starting the car after dark as any possible tracking issue on the ignition leads etc should be clearly visible.
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I did have one set of aftermarket leads where I found the wire was a poor push fit the the plug cap
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- just pulled out without any effort at all.
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yokomomr4bx wrote:PS.
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On a side note, does anyone happen to know what circuit these two capacitors are associated with?
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I'm afraid not.
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I believe those are decoupling capacitors just used to suppress
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"noise" on the power supply to the ICs, so when they fail the ECU would probably continue to function without them, unless you were unlucky.
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The real issue is the damage the gunk that comes out of them can do to the tracks on the circuit board.
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Which is why it's always a good idea to make sure to remove any traces found.
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I first hit this issue when I pulled away, and within a few hundred yards the engine management light started randomly fading in and out, even though the car seemed to be running OK, I returned home straight away as I didn't fancy pushing my luck to see if I could find if anything had actually stopped working
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When I opened up the ECU the adjacent tracks were in a real mess.
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So bad in fact that I didn't even bother trying to bridge the damaged sections and started looking around for a replacement.
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When a replacement turned up the first thing I did was to open it up to check the capacitors.
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Luckily one of them was only just showing signs of leaking and the gunk hadn't reached the circuit board yet.
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Needless to say I replaced both to be on the safe side.
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