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Backfiring from intake manifold

  

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Scotty I have a 2007 Honda Accord V6 3.0 I have 160k miles 50% of the time when I accelerate pedal to the metal the intake makes a pop noise and there's a slight drop in power for a second or two what's causing this I changed the spark plugs and ignition coil NGK not too long ago the prior owner had valve adjustment from Honda 60000 miles ago what could be causing this pop noise coming from the intake manifold thanks Scotty in advance


2 Answers
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Pressure test the fuel line. You may not have enough fuel delivery (either a weak fuel pump or clogged fuel filter). 


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Also, check the ignition timing to make sure it's correct.


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