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Engine misfires on #4, #5, and #6


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My car has taken a trip to the stealership 3 times now for misfires, and the techs can't seem to figure this one out! The entire bank is misfiring sporadically without giving clues as to what's causing it.

We've already replaced the coil packs, changed plugs, checked wires, and cycled through several tanks of fresh gas. However, still getting the misfires.

Now, is it the appropriate time to ask everyone about some other theories?

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the tech did check that before letting the car go. perhaps i should mention that the lifters were replaced before these misfires started showing up.

we cleared the code a few days ago, and now it seems to be running without codes showing up. should I just take this as one of those cases were the car just "fixes" itself?

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