Done some searching on the forums, and haven't seen one QUITE like this yet.
History: '99 LX, 231,000 miles, CA car originally, I bought it from the Dallas, TX area and brought it back to the nord-land. T-belt done about 30-40k miles ago with the Aisin kit, recently (within the past 30 days) replaced alternator with Aisin rebuild, various steering bits and bobs and fuel filter (Toyota) replaced recently as well. Rough idle problem predates alternator replacement. When I replaced the alternator I drained the coolant and pulled the lower radiator hose, and refilled the coolant with a vacuum system, and checked it for a couple of days. Saw no drop in coolant at either the radiator or the overflow tank.
Symptoms: Originally the rough idle would manifest itself after a long(ish) drive on the highway. Don't know if long drive in town would cause it or not. Rough idle would seem to come close to stall, but wouldn't get there completely. If I'd put it in P or N and give it a quick rev, the idle would smooth out. No CE lights during that period. Then two days ago the rough idle seemed to be worse, and seemed to manifest itself while sitting in my driveway while warming up in the AM before my 45min highway commute. Got to work, and didn't seem to have a problem. Go home and before I get to the highway, it has rough idle at stoplights. I gave it the quick rev in P or N, and it'd smooth out until I put it back into D. Rough Idle would come back when back into D. Still no CE light. At one stoplight I left it in D, stomped on the brake pedal with one foot and revved the engine with the other foot. THAT caused a CE light!! In fact, I got a FLASHING CE light for a couple seconds. The light then went solid. I didn't have my computer with me, and the vehicle wasn't running any worse, so I drove it home. Put my computer on it at home and had ELEVEN codes. They were Bank 2 pre-cat O2 sensor, and 2 each of the following: Random Misfire, and each even numbered cylinder misfire.
My first thought is vacuum lines, but I'm having trouble linking that to misfires on only one side of the engine. Fuel delivery has also run across my mind, but again I have trouble linking that to misfires on only one side of the engine.
Anyone have ANY thoughts?? Where should I begin my search??
Thanks in advance!!
History: '99 LX, 231,000 miles, CA car originally, I bought it from the Dallas, TX area and brought it back to the nord-land. T-belt done about 30-40k miles ago with the Aisin kit, recently (within the past 30 days) replaced alternator with Aisin rebuild, various steering bits and bobs and fuel filter (Toyota) replaced recently as well. Rough idle problem predates alternator replacement. When I replaced the alternator I drained the coolant and pulled the lower radiator hose, and refilled the coolant with a vacuum system, and checked it for a couple of days. Saw no drop in coolant at either the radiator or the overflow tank.
Symptoms: Originally the rough idle would manifest itself after a long(ish) drive on the highway. Don't know if long drive in town would cause it or not. Rough idle would seem to come close to stall, but wouldn't get there completely. If I'd put it in P or N and give it a quick rev, the idle would smooth out. No CE lights during that period. Then two days ago the rough idle seemed to be worse, and seemed to manifest itself while sitting in my driveway while warming up in the AM before my 45min highway commute. Got to work, and didn't seem to have a problem. Go home and before I get to the highway, it has rough idle at stoplights. I gave it the quick rev in P or N, and it'd smooth out until I put it back into D. Rough Idle would come back when back into D. Still no CE light. At one stoplight I left it in D, stomped on the brake pedal with one foot and revved the engine with the other foot. THAT caused a CE light!! In fact, I got a FLASHING CE light for a couple seconds. The light then went solid. I didn't have my computer with me, and the vehicle wasn't running any worse, so I drove it home. Put my computer on it at home and had ELEVEN codes. They were Bank 2 pre-cat O2 sensor, and 2 each of the following: Random Misfire, and each even numbered cylinder misfire.
My first thought is vacuum lines, but I'm having trouble linking that to misfires on only one side of the engine. Fuel delivery has also run across my mind, but again I have trouble linking that to misfires on only one side of the engine.
Anyone have ANY thoughts?? Where should I begin my search??
Thanks in advance!!