|
I wouldn't worry about the carbon on the spark plugs.
I run a kind of mad max tune where its lean all the time, except when I floor it. Then the air fuel ratio goes down to about 12:1.
Before that when I first got the suburban it was running the "idiot red neck tune" running so rich it wouldn't read on my air fuel meter a lot of the time and was getting half the fuel mileage it does now.
The plugs were fouled pretty good. I was going to change them when I got the tuning nailed down, but then I forgot.
Last week I pulled some of them and found that the lean burn had burned all the carbon off the ceramic insulator so I put them back in.
__________________
1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
|