I have a 1981 Datsun/Nissan 280ZX non-turbo and the #1 spark plug is not buring fuel at all. I put a new one in and still doing it. All other spark plugs are ok and burning the fuel. But the #1 has no burn marks and looks like it has never been used, I checked and there is spark from the plug wire and the plug itself too. The car does not run smoothly when idling and some backfire at cold start. Please help.
thx u.
Either your timing chain has jumped a cog, or a valve is stuck or burnt. Best way to check the timing is with a timing light. If the mark jumps all over the place, your chain is no good. To check the valve, do a compression test. Good luck. Let me know how you make out.
Try checking if there is power on the connector of injector using test light/meter tester. If there is no power, check the wiring and connector. It solve my problem.
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Thx u ourhowse.
I had a mech friend do a compression test and all was good. Are u sure its not the fuel injector that is not working? I will do the timing check, will let you know, thx u.
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