Question about 2009 Pontiac G8
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Posted on Jan 02, 2017
No special tools, however the hard part will be getting the plug wires off without pulling the inner contact apart. Rotate the boots on the plugs before trying to remove the wires.
Posted on Jul 02, 2009
A code “multiple misfire” may mean that one or more of the following has happened:
•Faulty spark plugs or wires
•Faulty coil (pack)
•Faulty oxygen sensor(s)
•Faulty fuel injector(s)
•Burned exhaust valve
•Faulty catalytic converter(s)
•Stuck/blocked EGR valve / passages
•Faulty camshaft position sensor
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.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Posted on Feb 01, 2010
on the 3.1, it is easier to change back plugs if you remove the coil packs. so you can reach the plugs from the top of engine. it almost seems impossible but this will work. it will give more room to work.
Posted on Jun 16, 2010
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