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I have a problem with Renault Megan Most likely its something with the coil but its really weird.

When i turn on the car its fine i drive for about 20-40km and the car starts to lose power like a coil would malfunction but then after 20-40km more its back to normal I want to fix it but I don't know which coil is malfunction because some times it works and other does not.

I want to avoid paying the mechanic just to plug in his computer and check which coil is broken, also i think it won't show any errors.

I could fix it myself if the coil wast working all the time i would just change one coil and drive and see it its the one that cause this but i cant because its sometimes working sometimes not. The engine light doesn't light either when the problem is active.

Is there any way to check if a coil is broken/malfunctioned without the use of a computer?

Regards,

Wojciech

AutoTester213
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My problem was That I am missing engine cover in my Renault (I bought it without it) the mechanic said that somehow water drops down onto the coils, He blow out the water from coils and now its grant but probably it will happen again as i live in Ireland and its raining nearly everyday :), So i will need to get a cover for my engine. The Coil itself was rusty but it was fine.

AutoTester213
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