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#1
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is there a way to test the coil?
At our clubs tech session on Sat one of the techs pointed out a slight greyish are on my 87 300Ecoil(320K miles) and said that the coil had gotten hot at some point. He rec changing the coil. Is there a way to test it? Also when searching under coil I noted other than OE coils eg Jensen. Do I want/ need them and do they fit well?
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#2
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Hello re coil advice
I must have posted at a bad time. Any way to test the coil? I was told my coil has a grey discolored area from getting too hot/having too much resistance at one time. How do I see if I need to replace the coil? could the excess resistance come from having the plug gaps worn to 35 or 40 from 30?
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#3
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Unless the coil is still running very hot, getting visibly distressed AND the car is not performing properly (eg. mis-fire, poor fuel economy, difficult starting, etc.), I would be reluctant to worry about it. I find that I can usually spend enough money replacing parts that definitely need to be replaced without worrying about any that maybe don't look quite right. I guess you need to look at what can happen if you don't replace it. I am in favour of replacing something that will cause damage or is dangerous if not replaced but all that can happen with your coil is that the car will stop.
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107.023: 350SLC, 3-speed auto, icon gold, parchment MBtex (sold 2012 after 29 years ownership). 107.026: 500SLC, 4-speed auto, thistle green, green velour. 124.090: 300TE, 4-speed auto, arctic white, cream-beige MBtex. 201.028: 190E 2.3 Sportline, 5-speed manual, arctic white, blue leather. 201.028: 190E 2.3, 4-speed auto, blue-black, grey MBtex. 201.034: 190E 2.3-16, 5-speed manual, blue-black, black leather. |
#4
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There is a way to test them with a VOM ,but I just unplug the coil wire leading to the center of the distribtor cap and hold the end of the coil wire about an inch or so away from a good ground with a pair of insulated pliers and have someone crank the engine over with the key on, a good coil will put out a strong arc to ground a weak coil will show a yellow weak spark.............
William Rogers......... |
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