Date registered: May 2010
Vehicle: 1995 C280 150K miles
Location: DC, USA
Mentioned: 0 Post(s)
Quoted: 85 Post(s)
Engine misfiring? Does a popping sound mean misfire?
The popping sound in question occurs almost instantly as I press my gas pedal to accelerate.
Scenario: This popping sound occurs when I have suddenly accelerated from a stop or especially after braking to slow down and depressing my gas pedal to accelerate back up. A few milliseconds after pressing my gas pedal, I hear a popping sound closer to the center firewall of the engine. I seem to feel the pop on my pedal as well, like something came loose!
Sometimes the car hesitates for half a second and then picks up and goes as nothing happened. Other times it hesitates further and I have to let the pedal completely off and then gently accelerate and the car recovers and goes as nothing happened.
This doesn't happen often time and is very hard to duplicate. But does happen. I have never had a check engine light come after the event. My gas pedal linkage is fine and there are no binds anywhere.
Is this a misfire? If this is a misfire shouldn't the car continue hesitating or misfiring more often?
I changed my spark plugs with Bosch F8DC4 plugs 25K miles ago.
Your analysis is appreciated.