Misfire at cruise, popping/afterfire at 3000RPM
Pulled the plugs to begin the compression test, and right away I see two problems. #6 and #7 plugs are sooty (previously I misspoke, it was #8 I pulled, not 6). And 6 has cracked porcelain.
Pulled the plugs to begin the compression test, and right away I see two problems. #6 and #7 plugs are sooty (previously I misspoke, it was #8 I pulled, not 6). And 6 has cracked porcelain.