GMC Repair: fuel injector, head gasket leak, buick electra

Question
How can I tell if I have a bad fuel injector in my 85 Buick Electra. I have a bad miss, did change spark plugs and wires. had one plug that was white?

Answer
You could swap the injector to another location and see if the problem moves to causing the plug to turn white also, But having a professional facility perform a CYLINDER BALANCE TEST would give you your answer.

There is a slight possibility that you could have a small head gasket leak as if anti-freeze is getting into the cylinder this will also cause the spark plug to appear WHITE in color.


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