Q: BMW Turbo Misfires

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Went in to limp mode with a JB4 G4 on the car. I replaced my coil packs and plugs with bosh parts, also did a new valve cover gasket and added an oil cooler "car did not come with one". Car still runs bad getting miss fires and ever code you can get with the N54 engine .

My car has 154000 miles.
My car has an automatic transmission.

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