Q: knocking on 2003 Chevrolet Malibu

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metal stiking metal knock in my car.started all at once. push the gas does it faster. not a gas ping---metallic sound not ping. plugs and wires replaced---po code 300--does not knock continually----seconds in between. help
(1) Answer
i have the same type car as you and i have this knockin sound too i found it comin from my transmission it was designed wit many flaws there is no way to check yo fluid level and your trans uses the fluid and the level is going to drop for a few reasons the best thing to do is to put a bottle of lucas oil in it it's only like $10 at kragen or auto zone and does wonders so if that don't work you may need to have it rebuilt