After lurking for 2 years this will be my first time not being able to solve a problem with a post on this site. 89 m20 motor started running rough out of the blue. Sounded like it was only running on 5 cylinders and got progressively worse like it was losing spark on additional cylinders I had a similar problem which was cause by water in the afm. Lead me to believe something similar happened again. A new afm didn't fix the problem.
Which made me think the ignition might be going bad. I've replaced the distributor cap as well as plugs and wires shortly after purchase. About two years ago. Distributor within last 12 months. I noticed that I wasn't getting spark from 3 of the distributor outlets before the wires with a simple screwdriver test. I thought maybes installation may have given it a shortened life. But wouldn't that have happened very shortly after?
I recently threw an O2 sensor code which I plan on replacing. The main problem needs to be fixed beforehand. Again first time posting on this site since all my other problems were fixed with other threads. But not his one. Thanks guys!
Which made me think the ignition might be going bad. I've replaced the distributor cap as well as plugs and wires shortly after purchase. About two years ago. Distributor within last 12 months. I noticed that I wasn't getting spark from 3 of the distributor outlets before the wires with a simple screwdriver test. I thought maybes installation may have given it a shortened life. But wouldn't that have happened very shortly after?
I recently threw an O2 sensor code which I plan on replacing. The main problem needs to be fixed beforehand. Again first time posting on this site since all my other problems were fixed with other threads. But not his one. Thanks guys!
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