VETDRMS

As the title implies I'd like any opinions on how the motor is running, judging from the plugs.

The lighting isn't perfect, but they are all clean and mostly the same color.
I am also running PFS fuel system cleaner. 1oz/gallon

I should also mention they were a little "sooted" up from the previous carb jetting/tune. They did "clean" themselves up.

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Thanks! :cheers:


[Modified by VETDRMS, 10:03 PM 3/22/2004]

Lt1er

From the looks of the black above the threads I would say that your rich and the motor isn't really getting up to temp. How clean they are is also a function to the plug tip heat range. Yours are correct for the condition they have been running in.

You really need to start with clean plugs and do the long cruise check for primary jetting while doing freeway steady state driving.

Is it an optical illusion or are plugs 3&4 showing signs of center electrode erosion?

VETDRMS

Lt1er Yes it was running richer. I stepped the primary and secondary jets down one. I will make a point to do some prolonged driving and make further adjustments.

I will take another look at plugs 3&4, thanks for the heads up.