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 Old 09-10-2019, 02:33 PM   #1
 
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Default Engine Smoke at Startup

I have a 2010 CX-7 with about 88k miles, 2.3 turbo engine. About a week or so ago the engine started hesitating and would not fire properly. My local shop, who is very honest and I trust, thought it was just a plug and replaced them. That did not help. They wound up replacing the fuel injectors, yes all 4 of them, and now the car runs great, better acceleration and fuel economy.

The problem now is there is a strange sound only during startup when the car has been sitting for a while. It sounds like a mini back fire. We started it up the other day and a puff of smoke came out of the front of the engine during the back fire noise. Please see videos attached.

Other than that the car runs great. Any ideas what could be causing the sample and feint back fire sound? My shop is at a loss as to the problem.


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 Old 09-10-2019, 05:58 PM   #2
 
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Default Engine Smoke at Startup

Here is a link to the video

https://drive.google.com/file/d/1tem...w?usp=drivesdk




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 Old 09-10-2019, 06:10 PM   #3
 
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Bad injector seals.
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 Old 09-12-2019, 02:07 PM   #4
 
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Thank you for the response. Does that mean the injector seal is not seated properly or it is old or both? Just need replacement?


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 Old 09-13-2019, 05:58 AM   #5
 
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Default

New seals should have gone in with the injectors. They probably damaged one or more or did not get at least one seated properly. Let them know and ask them to make it right.
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 Old 09-13-2019, 01:28 PM   #6
 
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Thanks everyone


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