spark plug burnt really bad

2004 CADILLAC CTS
147 MILES
Avatar
EMBONE
  • MEMBER
  • 8 POSTS
2004 Cadillac cts. Just replaced 4 weeks ago the previous spark plug was also burnt, what would cause this? Cadillac plug keeps misfiring the same cylinder, white ash deposits on old plug new plug 4 weeks old the bottom of the spark plugs is gone.
Apr 17, 2012 at 6:50 PM
Avatar
ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
the cylinder is too hot melting the plug. start with a compression test to verify the cylinder is ok.
then the injector needs to be checked as well. the coil needs to be checked. check for vacuum leaks making it run lean.
i would get help from a shop for this diag

Roy
Apr 17, 2012 at 7:00 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle