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It may but there are other sensors that will affect the idle performance.. Run fault codes first. Check the condition of the PCV valve and the EGR valve.
Take the EGR valve off the engine, then use some fuel injector cleaner (like you pour into the fuel tank) to clean the pintle (shiny steele rod inside the egr valve) and the seat (the valve that opens and closes off the exhaust flow). Once the pintle and valve seat are clean, check for smooth operation by pressing the diaphram with finger tips and releasing. It should feel like it is moving smoothly both ways.
Sounds like EGR Valve (Exhuast Gas Recirculation Valve) is sticking in the open position allowing exhuast gas into the intake manifold to soon which at idle will cause the engine to either run real rough or to stall out.Some EGR valves can be taken off and clean the carbon out of it or you can replace it.
it looks much harder then it is, the best thing for you to do is buy the new EGR valve so you have a reference to look at. then remove the air intake hose and top of air cleaner box, then look at were the throttle and cruse cables attach's to the throttle body you will need to remove the steel bracket that holds the cables to the throttle body then remove the two bolts that hold EGR valve and the plug in on the top and replace the valve, take your time and don't panic at is basic auto shop 101. Just think if you can get it done your self ( and you can ) think of all the money you will save............HAVE FUN
2000 Pontiac Truck Montana 3.4L SFI 6cyl The Flasher is located in the
front seating area, driver side, steering column,
mounted on base of steering column.
Hope helped with this (remember rated this help). Good luck.
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