Backfire on startup
Thread Starter
Instructor
Joined: Feb 2007
Posts: 131
Likes: 43
From: Peoria, AZ
Backfire on startup
I have a stock C7 LT3 with about 15500 miles. On the first startup of the day, there is a loud backfire. The car runs fine and this never happens again until the car has sat overnight and gets started the next day. Any ideas or suggestions?
Thanks,
Evan
Thanks,
Evan
Le Mans Master
Joined: Dec 2000
Posts: 5,348
Likes: 3,318
The initial cold start is louder than subsequent warm starts. This is completely normal. Many enjoy this sound.
(A backfire is when flame/air comes out of the air intake, backward to normal airflow in the engine. If this is happening you have a major issue to address.)
(A backfire is when flame/air comes out of the air intake, backward to normal airflow in the engine. If this is happening you have a major issue to address.)
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From: Atlanta GA
Dave
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Is the car new to you? If not does this represent a change in its performance at startup? Yes! Which end of the car seems to generate the noise, please? Where are you hearing it from? BIG difference in what's happening. 
Last edited by Avanti; Jul 13, 2020 at 07:38 PM.
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Mine has a little pop to it when first starting - seems normal to me.
Burning Brakes
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