Back fires

2008 CHEVROLET SILVERADO
60,000 MILES
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ERWIN VASQUEZ
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My truck runs great all the time but only when I reach sixty miles and take my foot off the gas creates a compression while shifts gears and when I step on the gas makes the back fire noise.
Jan 26, 2019 at 5:33 PM
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ASEMASTER6371
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Good evening,

Are there any codes set for the engine control system?

https://www.2carpros.com/articles/engine-backfires-while-running

This usually happens when spark happens at the wrong time.

Roy
Jan 26, 2019 at 5:39 PM
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ERWIN VASQUEZ
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Yes sr, my mechanic replaced all the sensors the computer call for, spark plugs, wires. The muffler shop replaced the donut seal where the back fire was
Showing to happened .
Jan 27, 2019 at 4:34 PM
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ASEMASTER6371
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Did they resolve it or is it still doing it?

Roy
Jan 27, 2019 at 5:25 PM
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ERWIN VASQUEZ
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Still doing it.
Jan 28, 2019 at 5:49 AM
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ASEMASTER6371
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And what about the timing and compression?

Roy
Jan 28, 2019 at 6:03 AM
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ERWIN VASQUEZ
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I’m sure the timing is right since it drives without any missing at all. I’ll get my mechanic to check the compression. It’ll be until the weekend since that’s the only truck I have for work. Thank you for the info.
Jan 28, 2019 at 1:55 PM
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ASEMASTER6371
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Your welcome

Always glad to help

Roy
Jan 28, 2019 at 1:56 PM