Question about Buick Century

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MY Buick Century that I purchased sat for like 3 years without been driven. I did a tune up which consisted of oil change, and plug change. I did not change out my wires and change the coil pack(3).. My car has started to run rough and sound like it is sick. What are some solutions. Could this be coilpack and wires.??

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  • Contributor
  • 19 Answers

With the vehicle having set for three years without having been driven, running rough or rough idle could be anything. Did you inspect the spark plug wires thoroughly to make sure there were not damaged? Did you drain the old gas and replace it with new? Are are you getting a check engine light? There are some simple steps to test the coil pack and here's an easy one

Posted on Jul 30, 2013

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  • Buick Master
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I would say its a fuel problem. You can try replacing the fuel filter, but there may be foreign matter in the tank and in the injectors.

Posted on Jul 30, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 93 Buick Century no spark

check the crankshaft sensor or cam sensor

Posted on Jan 15, 2009

  • 155 Answers

SOURCE: crossed wires while changeing plug wires on 3100v/6 with coilpack

Hi Raynellmarti. Here is the image of the firing order on a 3.1L Buick that c17hydro was trying to post for you. He encountered an issue uploading them, and sent them to me so that I could try and post them.

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Posted on Mar 19, 2009

  • 67 Answers

SOURCE: 1990 ford ranger 2.3L running rough at idle and while driving

Hi check all the fuse. fi the fuse are ok . remove the coil pack and reverce if the cly missifire change replace the coil if not chage replace the electronic comtrol module ok.

Posted on Apr 20, 2009

csmock132
  • 4669 Answers

SOURCE: 92 Buick Le Sabre engine stumbling/hesitation

Have you checked fuel pressure? How about spark on all 6 cylinders? Maybe a coil?

Posted on Apr 29, 2009

  • 130 Answers

SOURCE: p0301 trouble code

The misfire is detected by the misfire monitor as a slight change in engine speed which the PCM calculates back to a particular cylinder. The monitor is active continuously, but associates problems into 3 types. Two of the types are monitored on successive trips. The first trip the monitor detects a misfire it sets a pending code but not the MIL light. If on the second trip the same problem occurs the DTC code is set as current problem and sets the MIL light on. The MIL will stay on untill the DTC is deleted. The remaining type is a most sever case and signals the possibility of cat damage. In this case the misfire monitor identifies the problem and the PCM determines it to be severe and immediately sets the DTC as current and the MIL light to flash at a rate of 1 per second until the condition is no longer present, at which time the MIL stays on steady.

So once the P0301 is set it never turns off, except by code deletion procedure.

I think a lean burn condition could cause a misfire, but probably not from a PCV problem which should affect all cylinders equally. There would likely need to be another problem with that cylinder or intake or ...... .

Posted on May 02, 2009

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1 Answer

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