I've got a 1996 Oldsmobile 88 with a 3.8L v6. In September it started running pretty rough, and I borrowed a friend's OBDII scanner and it had a P0300 code. I have had the car parked over the winter (about the same time the problem started we bought and started driving a minivan because we had our 4th kid), but recently pulled it out to try and get it running again. A coworker suggested that it could be due to dirty fuel injectors, so I drove it through a tank of gas with injector cleaner, but that did not help. I read the codes on it again, and it now has P0300 (random misfire), P0336 (crankshaft position sensor) and P1200 (injector control circuit) codes. The rough running/misfiring occurs both while it is idling and while it is driving. When driving it will be especially bad at some rpm's, and cause vibration in the vehicle, and reving it up or down a bit smooths this out, but it is obviously rough and underpowered all the time. I would appreciate any assistance/advice you could give on where the source of the problem might be. The onset of the problem was fairly sudden (running smoothly, then over the course of a single drive it started misfiring and running rough and has continued to run rough ever since). Thanks for your help.
have the same problem?
Tuesday, March 23rd, 2010 AT 7:22 PM