Car is running rough at start up....then all of a sudden racing to 2000 rpms....best guess it is a egr issue. already replaced the idle controller
A faulty egr would not create a high idle issue. if an egr valve were to open while idling then it would create a heavy stumbling engine or it would die right out. if there is a check engine light on (or service engine soon light) have the codes pulled. Failing that then I suggest taking it to a reputable shop
SOURCE: rendezvous 04, the rpms stay idling high without pressing gas.
BUICK RENDEZVOUS IDLES UP REALLY HIGH...WITHOUT PRESSING GAS. WHAT IS THIS?
SOURCE: 2001 Buick Regal, 3.8L, 98,000
This happened to my 2001 Regal... There is a factory recall on the Catalytic Converter going bad. I had mine replaced with the recall and haven't had a problem since
SOURCE: 2000 LeSabre starts but runs very rough and stalls. After
My 2002 Lesabre (app 115000 miles) started something like this. Also the loose gas cap had been coming on for quite a while. I replaced the vacuum line from the air intake to the fuel sensor. It is under the engine cover (twist off the oil filler to remove the cover). There are two hoses together that come of the air intake. The small one goes to the top of the engine. The other goes across the front and makes a 180 turn back to the sensor. Chances are the 180 piece is cracked. It all comes from the dealer as one unit. $25
Seems to have fixed my problems. So if your car is running a little rough. Shutters under load. If the gas cap loose is coming on or probably a number of symptoms this might be the answer. I would replace this item. A cheap try.
SOURCE: car idles rough in park also runs rough in overdrive
Sometimes a rough idle like that is a fuel filter. As you've already done the plugs and wires the fuel filter would be my next bet.
SOURCE: Hi, I have a 2003 Buick Rendezvous with 101,000
YOU HAVE ENGINE VACUUM LEAK.AROUND THROTTLE BODY AREA COULD BE THROTTLE BODY GASKET OR ITS LOOSE.THE IDLE AIR INLET PASSAGE OR THROTTLE BORE IS DIRTY FULL OF CARBON BUILT UP.YOUR IDLE SPEED CONTROL COULD BE FAULTY.
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looking for the location of the egr, my book is vague at best....
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