Need help quick for cods #PO304,PO305,P0306 misfire multiple cylinders
All codes will show the same results
Symptoms
Symptoms may include:
Causes
A code P0304 may mean that one or more of the following has happened:
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.
Testimonial: "it will not start,it stalled out that why it put my code checker on it,I will get new plugs& wires"
SOURCE: code 301, random or cylinder 1 misfire
Spake pluge could have gone bad, or the Spark Plug wire. Try changing all your plugs and wire and inspect the old one's. The wire could be bad do to time or may have been against the exhaust manifold and brunt. Good luck
SOURCE: possible misfire
Did you try disconnecting and plugging any hoses going to the EGR, and see if it makes a difference?
SOURCE: how do I fix 3rd cylinder misfiring in 1999 dodge caravan
could just be a bad spark plug wire or spark plug remove for that cylinder see if you find any thing in that area.....irongod ps; somtimes the plug wire will get burned or just a bad spot on them look real careful at it
SOURCE: Multiple cylinder misfires 2001 Dodge Intrepid
If the engine is not missing now or running rough,The code may be an old one stored in the computer,
The code for Evap usually comes from someone getting gas and not tightening the fuel cap so it clicks at least four times.
SOURCE: NUMBER 5 CYLINDER IS MISFIRING, EVEN WITH NEW
did you try to replace the crankshaft position sensor?
P0305....Cylinder 5 Misfire Detected
P0442....Evaporative Emission Control System Leak Detected (small leak)
P0455....Evaporative Emission Control System Leak Detected (gross leak)
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