Spark plug wires- where date code stamped?
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Spark plug wires- where date code stamped?
I’m just starting to do plugs, wires, cap and rotor on my 81. I think car has original wires. They are gray with black boots. Wires read Delphi Packard 8 mm Made in USA every 2 inches. I just don’t see a date code. Any idea this date code would be? It’s a 57k miles car and the wires appear to be routed the way in came from factory. Wires for # 1,2,5 and 6 go between engine and motor mounts.
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I have a miss in cylinder #8. I took the plug out and it’s not fouled up. Little wet with gas though. I just did a compression test in that cylinder and got a reading of 130. That’s why I’m leaning towards a bad wire.
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Perhaps you do have a poor plug wire. Would only take a minute or 2 to check it with an ohm meter.
I have never seen a date code on a plug wire.
And I would be running that compression test on at least a few more cylinders for comparison. Guages can vary. But 130 sounds VERY low.
I don't know alot about the 81 engine. But thinking readings around 170-180 would sound alot better.
I have never seen a date code on a plug wire.
And I would be running that compression test on at least a few more cylinders for comparison. Guages can vary. But 130 sounds VERY low.
I don't know alot about the 81 engine. But thinking readings around 170-180 would sound alot better.
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From: Waterford WI
Perhaps you do have a poor plug wire. Would only take a minute or 2 to check it with an ohm meter.
I have never seen a date code on a plug wire.
And I would be running that compression test on at least a few more cylinders for comparison. Guages can vary. But 130 sounds VERY low.
I don't know alot about the 81 engine. But thinking readings around 170-180 would sound alot better.
I have never seen a date code on a plug wire.
And I would be running that compression test on at least a few more cylinders for comparison. Guages can vary. But 130 sounds VERY low.
I don't know alot about the 81 engine. But thinking readings around 170-180 would sound alot better.
Race Director
Joined: Nov 2006
Posts: 13,177
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
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If your certain they were dated. Perhaps you could clue us all in as to where to look for it.
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I did a compression test on all the cylinders except # 2 and 4 because I had to drop the starter to change the wires. All other cylinders were right there at 130 give or take only 1 psi. After wires change, that miss is gone. I removed wire 8 while car was running and car rpm’s came down, unlike before. No more slight stumble at idle. I would say these were definitely the original wires. Have to say, changing wires was not as bad as the hype. Maybe I’ll change them again in 2064.
