Since fewdays, I had a hole on my exaust pipe (connection between central and end pipe).Yesterday evening, I’ve clogged the hole with special mastic (gum gun). Thismorning no problem when I go for works (first heating). But when I start engine to come home, I’vedirectly the check engine light on (steady)!
During thejourney, I have some stutters (not hard and not constant) and engine stays high when no speed engaged.

Any Idea whatappend? Any idea what can I do?
Thanks a lot.

here is a picture of part before the mastic application:

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