Question about 1996 Pontiac Grand Prix
I have a 1996 Pontiac Grand Prix with 180000 miles. When cranked it sits and idles horribly, quickly rotating between hard and soft idle. When I put it in gear and head down the road it runs fine, until I come to a complete stop. What could be causing this? its a 3.1 engine. A second question on the same vehicle, Are the headlights supposed to be on all the time? Even when I turn the geadlight control switch to off they stay on. As soon as I turn it past the run position on the ignition.
Tanks for any help.
Hey bro i am a proud owner of grand prix beauties my self lol . The grand prix's have a outside light sensor that turns the your lights on automaticly when dark or gloomey, or driving under a bridge, eliminateing the need to use the switch. Your sensor could be dirty or broken if the lights are staying on on a suny day.
Posted on Oct 04, 2009
Hey i have the same problem with mine. except mine is constant. a good tip is if your check engine light is on. i'd take it too your local auto store and use a OBD 2 code scanner. mine is being caused by malfuntion sensors. they really are a pain. but i'd check your sensors. take and check for leaks in your intake plumbing. if you have air leaking in after the MAF (mass air flow) it will cause the car to run lean which causes knock (diesel) effect inside the motor. these cars are complicated. im a mechanic myself and with these cars there is alot of varibales into a motor. i miss the good old carbs. but like i said go through your sensors and check for air leaks after the MAF
Posted on Dec 26, 2008
Vaccum leak. Look on top of the throttle body, there'll be sometype of line splittier that goes into the throttle body, a piece of correct size hose from your local auto parts dealer will fix it. It only takes an inch or so of hose to fix! good luck!
Posted on Dec 20, 2008
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Posted on Jan 02, 2017
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