Question about 1999 Oldsmobile Intrigue

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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.

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  • Anonymous Mar 17, 2014

    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

  • Anonymous Mar 21, 2014

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

  • Anonymous Mar 25, 2014

    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.

  • Anonymous Mar 26, 2014

    is it the computer box or the sensors

  • Anonymous Mar 30, 2014

    where is the mass air flow relay sensor



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  • 422 Answers

Fuel pressure regulator on the fuel rail is probably it or the egr valve is stuck open allowing burnt fuel to flood the intake, im leaning towards the fuel pressure regulator because the o2sensor is probably reading rich or if its reading lean then i would choose the egr valve . good luck

Posted on Aug 26, 2008


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under the drivers door with a bracket holding the filter on. Be carful some of them have clips holding fuel lines on. might have to tak tank off, but that might lead to a leaking tank,straps a hole lot of mess. Best way is to take off filter, leave off put rubber hose on fuel line and put into a fuel can turn on the key and wait to empty.hope not to much gas in tank.

Feb 22, 2009 | 1999 Oldsmobile Intrigue

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