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30 Closed Cab PU · 11-09-2019, 09:16 AM

My A makes a little what I call a "coughing/quiet pop" sound when shifting and foot off the gas slowing down from higher rpms. It is not a true firecracker/shotgun sound that would wake the neighbors, which is an exhaust backfire. Instead of running at 1/8 open on the GAV, run the GAV about 1/3 open and issue is resolved.

11-09-2019, 09:16 AM	#8
30 Closed Cab PU Senior Member Join Date: Aug 2018 Posts: 2,332	Re: Backfire or popping when going down hill My A makes a little what I call a "coughing/quiet pop" sound when shifting and foot off the gas slowing down from higher rpms. It is not a true firecracker/shotgun sound that would wake the neighbors, which is an exhaust backfire. Instead of running at 1/8 open on the GAV, run the GAV about 1/3 open and issue is resolved.