C5 carbon buildup
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5th Gear
Joined: May 2025
Posts: 5
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C5 carbon buildup
Bought 04 with 26K. I have the check engine light on. Mechanic told me the previous owner left the car sit too long and it has carbon built up on the cylinder/injectors. Any suggestion for how to burn off the carbon? I have used techron addiitive. Are there any other fuel additives more effective? Thanks.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,619
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From: Cape Coral, Florida
What is the trouble code ??…how do you know for sure it’s a clogged injector ??…find a diagnostian that can test your injector and tell you what’s wrong…an injector balance test will tell you if it’s clogged or not.
Drifting
Joined: Sep 2022
Posts: 1,460
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Bought 04 with 26K. I have the check engine light on. Mechanic told me the previous owner left the car sit too long and it has carbon built up on the cylinder/injectors. Any suggestion for how to burn off the carbon? I have used techron addiitive. Are there any other fuel additives more effective? Thanks.
Tell us what code(s) it has posted, can't tell much without that.
Le Mans Master
Joined: Jul 2010
Posts: 6,013
Likes: 726
Bought 04 with 26K. I have the check engine light on. Mechanic told me the previous owner left the car sit too long and it has carbon built up on the cylinder/injectors. Any suggestion for how to burn off the carbon? I have used techron addiitive. Are there any other fuel additives more effective? Thanks.
