Question about 1996 Plymouth Voyager
I don't know, we have replaced the coil pack, fuel filter, spark plugs and spark plug wires it still says p0352 and p0300. it vibrates the entire van and it smells like gas fumes coming out of the tail pipe. please help.
You either have worn valves in the head or a leaking injector,
to still have a cylinder misfire on #2 or a vacuum leak
Think you installed too many parts already
Have a shop do the proper testing
Cylinder leak down test for the valve issues
and many different ways to test the injectors
Need to start with a professional scan tool & road test
to look at data, before any of what you did or replaced
Changing parts was how we worked in the 1960's & 70's
Posted on May 14, 2014
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Posted on Jan 02, 2017
Have someone press on the gas petal while you feel the exhaust coming out of the tail pipe.It should have more exhaust coming out as the petal is pressed farther down. This method is checking for a restriction in your catalitic converter. A high flow type is best. Also make sure your air filter is clean and nothing blocking your air filters intake.
Posted on Aug 31, 2009
I'd have fuel pressure checked, and at the very least, replace fuel filter. Not unusual to get multiple misfire codes due to low fuel pressure, thus starving cylinder(s), and causing the misfire code(s).
Posted on Apr 25, 2010
Tips for a great answer:
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A code P0300 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 ( 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 (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
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