Plugs are new , wires are new , Engine light still comes on with P0300 P0301 P0302 P0303 P0304
Hi friend ,maybe this PDF can help you to solve the problem, Diagnostic Trouble Code Table ,hope can help you .
Have you had somebody clear the codes after you installed the parts.If not the codes have to be erased by using a scan tool.
SOURCE: Engine light comes on - Code shows P0300 and then
OBD II 300 Random/Multiple Cylinder Misfire Detected
When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.
Possible Causes:
Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition system concerns including, but not limited to:
Faulty spark plugs
Faulty coil or related wiring
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues
SOURCE: 2000 dakota 4.7 v-8 codes p0300 p0303 p0304 p0307
well the codes
p0300 multiple misfire
p0303 misfire cylinder 3
p0304 misfire cylinder 4
p0307 misfire cylinder 7
can be alot of things check cylinders for compression is what i would do first..
SOURCE: 2000 dakota 4.7 v-8 codes p0300 p0303 p0304 p0307
Catalytic converters on the Dakota's were a recall issue from 1999-2003 models.
I had a 99 and a 2001 and had the same problem on both.(3 times on the 99 and once on the 01)
You should also check the speed sensor on the rear axle.
The neutral safety switch and the EGR valve.
If I were you,I would start with the Cat and EGR,then check the other stuff if you still have issues.
Please rate this a fixya
SOURCE: P0132 code along with P0300, P0301, P0302, etc.
check for intake manifold for vacuum leaks, use a can of spray carb cleaner and spray around the top of the engine, if you hit a leak the engine idle will change, P0302 is a miss in #2 cylinder (cylinder power output low, lean cylinder due to poss vacuum leak and other issues.). once again an O2 will not cuase a mis-fire.
SOURCE: 06 Dodge 1500 V8 4.7L: Overheating, Engine Light
Hi
Check for plugged exhaust system. If plugged will cause overheating and misfiring of all cylinders.
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Yes, I cleared the codes twice and the codes came back after the plugs and wires were changed.
I also have a 2002 Toyota Camry 2.4 ltr engine that has the codes p0300, p0301, p0302, p0303, and p0304. I have replaced the plugs, coils, fuel injectors, and the cam sensor. I have also done a compression check, and a smoke test. And I still have the same 5 codes. Everywhere I check says that they fix the codes by doing a lot less than what I have done.if it helped I also removed the timing cover and the timing is perfect. Now I am stuck now I still have the same codes P0300,P0301, P0302, P0303, and P0304. As far as clearing the codes over, and over again.i have had these codes for a year as I have been working on it. Removing the battery while working on the timing chain cover. I know the codes are a Random Misfire in all cylinders. Can anybody please give me some advice?
check fuel pressure, lower than required fuel pressure can cause a misfire on all the cylinders.
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