Question about 2006 Buick LaCrosse CXS
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Posted on Jan 02, 2017
Information courtesy of http://obd-codes.com
A code P0304 may mean that one or more of the following has happened:
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.
Posted on May 21, 2009
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
Posted on Jul 20, 2009
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
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.
Posted on Nov 22, 2010
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