Question about 2004 Buick LeSabre

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Rough idle at very low speed

Car runs rough when I put it in gear, however it smooths out when I accelerate. It just started this afternoon when I got off work stopped at a stop light and I could feel it I have never had this problem before. If it makes a difference gas tank is less than a quarter tank and needs an oil change.

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  • 10 Answers

More than likely a vacuum leak or PVC

Posted on Nov 22, 2013

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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: flashig oil light

You either have a loose/worn engine bearing or a worn out oil pump, do not drive the car this way, you will cause serious damage to the whole engine. A oil switch is for a light, it turns on the light when oil pressure falls below about 10 PSI, a sending unit is for a guage that shows oil pressure with a scale, it may have numbers on the guage or just green and red, or high and low.

Posted on Oct 10, 2008

  • 115 Answers

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.

Posted on Mar 15, 2010

  • 1 Answer

SOURCE: 99 Buick Century Custom; Dash lights stopped working.

The problem is with a set of resistors on the back of the instrument cluster. If you remove the trim panel in front of the cluster, there are four screws holding the cluster in. Remove the four screws and remove the cluster. Unplug it from the wire harness and flip it over. Unclip the back black plastic cover. Pull the printed circuit board straight out. Now, flip the board over and look on the top right quadrant just to the left of the trip odometer button. You will see up to four small cylindrical resistors. There should be four, but the solder on these seems to give out and they fall off the board. How I fixed mine was to go to Radio Shack and get 4 1/2Watt 150Ohm resistors and solder them in place of the four lousy ones. Reading the old ones, they ran from 127Ohm, to 154Ohm. Checking on other posts, I have seen that they are supposed to be 125Ohm, but either way, the 150Ohm was the closest I could get and they worked perfectly.

Posted on Aug 26, 2010

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1 Answer

Rough idle smooth accleration


Check your vacuum lines and be sure your throttle body is tightened down. Carb cleaner spray can be used to find the leak. Spray it around the lines and gaskets (while the engine is running). If the idle speeds up, you found the area of the vacuum leak and the solution to your problem, possibly.

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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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Car starts rough idles very low almost dies while idling and will die when put in gear. will not accelerate up hills (loses power). have been told there are many vacuum leaks and the transmission will...


your vacum leaks has alot to do with it have vacum leaks fixed auto parts store sells the correct size hose you need at a ver fair price fix vacum leaks first then see how it runs after thatcheck fluid level in transmission and change transmission filter

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When putting van in gear the engine runs rough


how about putting the van in drive with one foot down hard on the brake and rev the engine, does it smooth out now? if it smooths out, i would pull the air cleaner tube to the throttle body and spray the throttle body with carb cleaner, be careful if using the red tube, I have had it blow off before into the intake, not good, open the accelerator and spray it out really good, it will to start until all the cleaner clears out.

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