John McCormack Posted September 18, 2020 Report Share Posted September 18, 2020 (edited) Over the past week or so I have experienced fouled plugs when caught in heavy traffic. While this is not unusual in a PI today my coil failed. With a new coil the car feels to be running better. Could a weak and failing coil exacerbate plug fouling? It makes sense to me, a weak coil giving a weak spark leading to plug fouling. Edited September 18, 2020 by John McCormack Quote Link to post Share on other sites
Mike C Posted September 18, 2020 Report Share Posted September 18, 2020 Was the engine missing when the plugs fouled? Quote Link to post Share on other sites
John McCormack Posted September 19, 2020 Author Report Share Posted September 19, 2020 17 hours ago, Mike C said: Was the engine missing when the plugs fouled? Yes, missing badly when revved under loads, even light loads. I got a good drive in today (bear in mind I live in the centre of a big city so a good drive isn't >90km/h freeway stuff) with a good bit of idling without bad plug fouling. When I pulled the plugs No1 was a bit dark, not wet, but the others were an OK colour. Quote Link to post Share on other sites
Mike C Posted September 19, 2020 Report Share Posted September 19, 2020 1 hour ago, John McCormack said: Yes, missing badly when revved under loads, even light loads. I got a good drive in today (bear in mind I live in the centre of a big city so a good drive isn't >90km/h freeway stuff) with a good bit of idling without bad plug fouling. When I pulled the plugs No1 was a bit dark, not wet, but the others were an OK colour. There's a fair chance the coil couldn't fire the plugs properly, causing missing and associated plug fouling. Hopefully you've solved your plug fouling problem. Quote Link to post Share on other sites
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