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In my 253 HZ running std strommie...185 accross the board comp...new electronic dissy, leads & NGK plugs.
When I check for plug electrode colour I get white electrodes on all cylinders except #4, which has a nice bronze colour. on the others they are white (clean) with fawn coloured earth tip?? I hjave the mixture screws at just under 1 1/2 turns out on both but makes no difference?
Any ideas please....as she also has a flat spot at 1500rpm and pinging under load...dissy is set to 4degs advance as i tried to set as per bonnet info but could not get down the road...4 is ok at this stage. I got a ACA electronic dissy.
Cheers Darren
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Joined: 1/03/2005(UTC) Posts: 1,991
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The unleaded petrol makes judgment by the colour of the electrodes unreliable. The pinging could be running a bit lean, low float level, blocked fuel filter not allowing full flow of fuel,this also could be reason for flat spot. The dissy set you have to
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Rank: Guest
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either a slightly worn ring, or maybe a dodgy lifter/valve? if its just on one cylinder it can't be anything common like mixture timing etc
VN Calais, V8 Auto, Blown etc etc.
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