503s2k

Hi,

I have a 00 S and today I finally had a chance to check my spark plugs. I noticed that the tip is whitish so it seems that my car is been running lean. I also noticed that the white ceramic part showing the brown color which i think this is a sign of the car running too hot. I checked the gap and I think that the reason is because the gap could be wider than 0.040''

What should I do to prevent the car from running lean? Can I reuse these spark plugs, Would sanding them down and regap them to the right specs helps? or should I just buy 4 new plugs and go from there.

ps. the car also has lumpy idle once in awhile. ( I will try the MAP whack)

Anyone out there can give me some advice? thanks

Slows2k

There is nothing wrong with a stock NA car's plugs looking like that. Don't sand the plugs, you'll remove the platinum from the tip.

Stock cars run lean at part throttle, normally.

Emil St-Hilaire

And overly rich,in the upper RPM range.!!!

xviper

Unless you are blown, you are worrying about something that is pretty normal.

ED7

The brown is actually a sign of it recieving enough fuel...not overly hot. And the white/grayish is normal under crusing like they said.

503s2k

thanks for the input guys.

(Slows2k
There is nothing wrong with a stock NA car's plugs looking like that. Don't sand the plugs, you'll remove the platinum from the tip.Stock cars run lean at part throttle, normally.)

I thought xviper recommended to sand the negative electrodes down with sand paper?


The car has 42k miles now, would it be a good idea to change the spark plugs now or can I reuse them?

xviper

This is so, but I do recall posting a "caution" that if sanding, DO NOT touch the central electrode and to not do this when it involves a double platinum plug where the negative electrode also has platinum. For copper plugs, go nuts. It won't matter.

503s2k

hey guys, what is the right gap for PFR7G-11S 7772 plugs, on here people said 0.040'' but I checked at the auto part store they said 0.044'' for this car. Thanks

xviper

You can have either or anything in between. There is no specific number, just a range.