Question about 2006 Buick LaCrosse CXS

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P0306 was driving perfect until this morning as I went to accelerate it starting shaking/missing......continue to miss on idle and acceleration ever since. Put analyzer on vehicle and got code P0306.....wat possibly can be the issue and the 2006 LaCrosse carry coil packs and not plugs and wires right.....

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

greg_margo
  • 1959 Answers

SOURCE: engine misses at 35 mph code po 304 coil pack plug wire replaced

Information courtesy of http://obd-codes.com

A code P0304 may mean that one or more of the following has happened:

  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor (s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
Possible Solutions If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Hope this helps with your problem. Best of luck.
Greg

Posted on May 21, 2009

  • 148 Answers

SOURCE: 97 Lesabre misfire

change all plugs an wires if you still get the misfire on #3or#6 the coil pack is parabley bad

Posted on Jul 17, 2009

  • 850 Answers

SOURCE: 1996 Buick Century- When accelerating from

low on fluid!
transmission pump failing or converter loose or cracked drive plate where converter bolts up to
could be slipping clutches or bands
or even the control module
get it to a workshop asap!
preferaly dont flat tow it or drive it as your only doing more damage
Cheers Rob.

Posted on Jul 20, 2009

chromapr
  • 267 Answers

SOURCE: I have an 2002 buick century that has a iginition

double check plug wires to be sure they go to the right cylinders. After that i would check fuel injectors
You need a listening device and listen for metallic clicking sound. Bad injectors will be silent and they do cause the same miss

Posted on Apr 21, 2010

airjer995
  • 5332 Answers

SOURCE: I need to know the

Do you have a code for a misfire?

If a crank sensor goes bad the vehicle will typically not start at all.

If you have spark to all the cylinders than the next step is to either check compression or check the injectors. Usually the injectors will stick when this happens they will ohm out fine but will not spray fuel. To check them you will need either a high end scan tool or and injector tester and an fuel pressure gauge. The tester is connected to the injectors one at a time using the bulk connector near the alternator. The injector is then triggered by the tester as you watch for a drop in fuel pressure. Whichever injector does not drop fuel pressure when triggered is the bad injector.

airjer995_11.jpg

Posted on Nov 22, 2010

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