sooty glow plugs
hi i have changed the front 4 glow plugs now and noticed black soot on 1 side of each glow plug . my 940 tdi 1995 starts 1st time every time ,MPG is always about the same up to nearly 40 mpg on long runs and 30 round city . oil consumption is within limits im told ,1 litre about 5000 miles .
so is there any concern for the sooty plugs ?
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