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Why is the number 3 spark plug a little darker than the others on my 1993 previa?
Wiki User
∙ 15y ago
possible causes are dirty injectors or loose connection on high tension cables from distributor to the plugs.
Wiki User
∙ 15y ago
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My 1993 Previa started to missfire I changed spark plugs wires cap and rotor the plug in number 3 Cilinder was darker than others after three weeks I checked them again same thing any idias?
try checking the #3 injector first if it dirty. If not, bring it to a mechanic with an engine analyzer/diagnosis device - you would probably find an idea where the fault lies.
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