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Cylinder #4 not firing....? 120-130

posted by  RepairmanJackal on  Fri Sep 16 10:45 CST 2005
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last visit: Tue Jun 10 09:52 CST 2014
[RELATED]

I've been tracking a weird "pop" noise coming from my motor. It appeared a couple of weeks ago, but given the limited use the car gets, I was slow to trace it to the source. I was giving the car a compression test today when I realized that the popping noise was coming from Cylinder #4. With the car idling, I pulled the #4 wire and the popping noise stopped and the idle sounded smooth again.

I'm wonder what the probably causes for this problem are?

I'd suspect a bad wire, cap, or points. However, the car has a nice set of Magnecore Wires, Crane Electronic Ignition, and Bosch Plugs. There are no points, no vacuum advance or anything like that in the system and the problem appeared suddenly, not gradually.

So any ideas? I'm planning on getting some new NGK plugs, but what else ought I consider?


--
1967 P220 Amazon, 1972 145S, 1976 245 DL, 1983 245 DL, 1986 745 GLE, 1990 745 GL, 1995 945....
You mean to tell me that Volvo makes cars that are *NOT* Wagons?!?






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