Okay, that usually is called backfiring.
Is this backfire back out the intake manifold, or out the exhaust tailpipe?
If out the tailpipe it could be due to a fuel injector dripping gasoline when the engine is off and building up some gas in one cylinder, then when you go to start the engine or immediately after starting pow, pow, pow until it burns off that excess gas.
I would remove each spark plug after the engine has sat overnite and smell for gas on any spark plug, then if found try a fuel injector cleaning or replace that one fuel injector. Or you could see if there is a misfire code for a single cylinder, then either try a fuel injector cleaning or replace the one fuel injector.
If the backfire is back out the intake manifold instead, let me know.
Either way you should retrieve any trouble codes just in case maybe it is just a failing sensor, etc?
SPONSORED LINKS
Saturday, March 31st, 2018 AT 7:26 AM