Join Date: Sep 2008
Location: southern Minnesota
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Sounds very familiar. could be a worn plug, leaking coil, leaking valve, head gasket, .... the list goes on and on. if the code comes up as P0300 or p0301 - P0303 that would be a misfire on a cylinder.
I would start with changing spark plugs, then if it comes up with one code in particular, maybe change the coil for that cylinder. Or swap with another cylinder and see if the code changes to that cylinder.
We have seen some help by adding Marvel Mystery Oil to the gas and sometimes that clears things up too. Mine seemed to get better after I changed out the exhaust as the flex pipe was cracked and started to get noisy, but eventually I lost a cylinder (after 146,000 miles) and sold it to someone who was able to work on it more than I could.
Keep a list of what codes you are getting as that could help find the problem.