Bought this van used, it had a rough idle but no trouble code. I had a mechanic at buying site change all the spark plugs, I asked for COP's too but he did not do it, but I just had to deal with it. After about eighty highway miles I finally got a check engine light resulting in a P0304. I changed all the COP's, reset the computer and it still had a misfire and threw a P0308. I changed the number eight COP for another and reset the computer. No change in misfire. At this point I thought it could be fuel delivery, so I put two bottles of Sea Foam in the tank. I drove the van for fifteen miles and pretty much had the same misfire that it has had all along. During this drive I got a P0300 first, then when I got close to home it threw a P0310. What would cause the codes to move around like this?
And for what it is worth, it runs really rough in reverse for whatever reason.
And for what it is worth, it runs really rough in reverse for whatever reason.
Apr 14, 2018 at 4:12 PM
