Does this spark plug look normal?
#1
Does this spark plug look normal?
I have now 400 miles on the new motor as well as these new AC Delco plugs. The color of them is a rust brown or light brown.
Does this look normal, I am thinking the A/F ratio is a tad on the lean side from watching the beahvior of the O2 sensor voltage readings compared to my previous motor.
Thoughts?
Does this look normal, I am thinking the A/F ratio is a tad on the lean side from watching the beahvior of the O2 sensor voltage readings compared to my previous motor.
Thoughts?
#4
Here is why I Think I am running lean.
The O2 MV readings when bouncing do not get into the 800's or higher on my Scanmaster, the old motor reached 900 MV routinely.
WOT O2 MV is low to mid 800's or so.
I think I am getting some very slight knock at high RPM's. Still might be false.
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