Anyone tell me what my used spark plugs say about how my motor is running?
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Recovery Vehicle
Joined: Feb 2009
Posts: 1,197
Likes: 182
From: MEMPHIS, TN
Anyone tell me what my used spark plugs say about how my motor is running?
Oil on the threads is from valve gasket leaks. Just want to make that clear. Plugs aren’t wet. There are only seven because I lost one. Plugs ha e no more than 10-15k miles.
Lean Lean OK Lean Rich OK
I just did this too. Gaps are supposed to be 0.044. All my plugs were there, but one was 0.050. From now on I will check gap before installing. I cleaned my old ones for spares, they were iridiums. Bought new NGK platinums.
I just did this too. Gaps are supposed to be 0.044. All my plugs were there, but one was 0.050. From now on I will check gap before installing. I cleaned my old ones for spares, they were iridiums. Bought new NGK platinums.
Mudding
Joined: Sep 2014
Posts: 195
Likes: 7
Previous comments are probably correct that its a bit lean, but nothing in that pic screams there's a problem.
You could look up some of the info on engine/intake/injector cleaning, but then there's the if it ain't broke, don't fix theory. It's not like these were ever known for being clean burning efficient engines. Don't over think it, if it's running ok.
You could look up some of the info on engine/intake/injector cleaning, but then there's the if it ain't broke, don't fix theory. It's not like these were ever known for being clean burning efficient engines. Don't over think it, if it's running ok.