Had my mechanic change the TR6's today after 15,000 miles. Have a 4lber with a conservative tune. Truck rarely sees wide open, maybe every 4 months if that, no 1/4 runs ever. The plugs on the drivers side have a slight green color while the passenger side is normal. Truck is serviced like a baby. Mechanic though it was a sign of coolant? When I had the plugs changed a year ago they showed normal wear.

Your thoughts?

Dont have my digital camera with me as I would post a pick.

Thanks for your response...

 

Green=lean

 

YOU HEARD WHAT THE MAN SAID ? HE'S 100% CORRECT

DO SOMETHING ABOUT IT IMMEDIATLY

If your lucky, only this will happen


if your not lucky, YOU DON'T WANT TO KNOW

Known causes:
Clogged Fuel Filter
Clogged Injector or three
Bad Gas
Low Octane
(if it was 1 plug, maybe a weak coil, but it doesnt sound like that)

I would:
Change Fuel Filter "if" it isn't new,
Add some GOOD Fuel Injector Cleaner
Find some HIGH octane Fuel to run through it
and get the A/F checked ASAP
(and personally I would be running a colder plug)

Best of Luck