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07/01/2023 4:24 pm
Topic starter
1987 chevy nova 4alc 1.6L 4 cyl. toyota engine carbuetor. 78,000 actual mileage
#1 plug is misfiring brand new plugs, plug wires, dist cap & rotor. When i fire it up it starts immediately and still is running on 3 cyls when cold after warm up then it will eventually run on all 4 cyls. When i check the #1 plug its running rich black color the other 3 plugs are normal color. I checked the valve adjustment & no tight valves. The compression on the engine is #1 160lbs #2 165 #3 165 #4 165 The vehicle has the california smog devices on it. Thanks Scotty need you help!!
1 Answer
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07/01/2023 5:38 pm
If your #1 plug is black either that cylinder is running too rich, or it's shooting oil past the oil control ring or pulling oil through a bad 36-year-old valve stem seal.
