Hi went for a drive last night, when I accelerated from 2nd to 3rd gear and the rpm increased to 50 the engine made a missing noise and the engine fault light came on and the battery light came on faded. I decreased my speed and tried accelerating again and the problem occurred once again. What can be causing this? Also, I changed my spark plugs and #4 plug is burning a rusty red color while the others are burning perfect.

Cheers.

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RJ