I have a 1999 oldsmobile intrigue that is misting a lot. It idels rough, and runs rough. I can still take off it is a little slow, but I can still go pretty fast, but it still mist at the high speeds pretty badly. I have checked the mass air flow sensor, the oxygen sensor, I have replaced all spark plug and spark plug wires, and still nothing. The computer at Autozone said there were three codes on it, Misfire in 4, Oxygen Flow Sensor, and Mass Air Flow Sensor. After we changed spark plug and spark plug wires took it back and still said the Mass Air Flow, and Oxygen Sensor, so we replaced the Mass air flow there and checked and still no problems. The check engine light does not come on. Can you help.

runs fine then runs rough. starts to buck, it has a new fuel pump and fuel filter, oxygen sensor., throttle body sensor, spark plugs, wires, rotor and cap, mass air flow sensor runs fine then runs rough. starts to buck, it has a new fuel pump and fuel filter, oxygen sensor., throttle body sensor, spark plugs, wires, rotor and cap, mass air flow sensor

the service engine light keeps coming on. have changed the oxygen sensors, changed spark plugs. what else can be done. the service engine light keeps coming on. have changed the oxygen sensors, changed spark plugs. what else can be done.

1998 3S7144376 3Sfe engine was bogging down when I hit the accelerator. I started running rough after sitting dormant for months. The problem persisted and I cleaned the spark plugs. What is the best plug for this engine? Could I have been having an oxygen sensor problem? How could I check this out? After sitting for months without starting it blew some white smoke from the tail pipe. What causes that? It sounds like it's OK now, but I want to be sure. 1998 3S7144376 3Sfe engine was bogging down when I hit the accelerator. I started running rough after sitting dormant for months. The problem persisted and I cleaned the spark plugs. What is the best plug for this engine? Could I have been having an oxygen sensor problem? How could I check this out? After sitting for months without starting it blew some white smoke from the tail pipe. What causes that? It sounds like it's OK now, but I want to be sure.