Plug wires not in order. - Mercedes-Benz Forum

 
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post #1 of 8 (permalink) Old 09-22-2015, 01:52 PM Thread Starter
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Vehicle: 1970 280SL
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Plug wires not in order.

Was looking at the distributer cap and realized that the plug wire one was in number three spot and three was in number one's position. The car runs kind of rough but it shouldn't run at all in that configuration. Could it be that the timing chain jumped and that someone made the adjustment?
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post #2 of 8 (permalink) Old 09-22-2015, 02:03 PM
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These engines have a fairly short double-row chain that's well-confined by the sprockets and guides. I have never heard of one jumping a tooth. Why don't you put the wires in the correct order (153642) and see if the engine runs better?

Chuck Taylor
Falls Church VA
1998 SL500
1959 220S
1970 280SL
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post #3 of 8 (permalink) Old 09-22-2015, 02:16 PM Thread Starter
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Good idea but if it was out of order I wouldn't think it wouldn't run at all.
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post #4 of 8 (permalink) Old 09-22-2015, 02:24 PM
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Wanna try that again Chuck?

Too young, too old, just right

15/36/24

1-5-3-6-2-4

Yes it will run with two wires crossed. Usually will give a back fire under load but not always.

Last edited by Mike D; 09-22-2015 at 02:26 PM.
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post #5 of 8 (permalink) Old 09-22-2015, 02:40 PM Thread Starter
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I looked at the setup of the cap and found the same order that you posted. The manual that I have though shows it to be 6-2-4-1-5-3. I have a feeling that firing order is for another engine and not for mine. The manual that I'm using is Haynes that covers 68 - 72 for 230, 250, & 280. On page 98.
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post #6 of 8 (permalink) Old 09-22-2015, 03:04 PM
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Use page 98 to wipe the oil from the dipstick the next time you check lube levels.

Firing orders always start with #1 .
S320L1999 and rumb like this.
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post #7 of 8 (permalink) Old 09-22-2015, 03:16 PM
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I had the same situation a couple weeks back. The car DID run but not very well. When correct wire to correct cap terminal BIG, BIG difference. Ha Ha HA!
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post #8 of 8 (permalink) Old 09-22-2015, 04:31 PM
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I am embarrassed, and thanks for the gentle correction. In any case, it's on top of the valve cover in big numbers.

Chuck Taylor
Falls Church VA
1998 SL500
1959 220S
1970 280SL
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