How do I fix the code p 0303 misfire number 3 cylinder

code p 353 is ignition coil C primary/ secondary---circuit malfunction===causes wiring--ignition coil--ECM
code p 0303 is misfire on cylinder 3===causes --engine mechanical fault---wiring---ignition / fuel---injector---ECT/MAF sensor --ECM
at this point probably the price of a new coil and fitting costs

If it was just cylinder 2 or 3, the code would be 0302 or 0303. Instead, you have random misfires (probably) such that you should be checking things that affect the whole engine. Vacuum leaks, bad plug wires, bad coil(s) or ignition module are most likely, but even clogged exhaust, O2 sensors and bad battery can cause these problems. Yes, a battery can be good enough to start your car but still be bad enough to affect performance. If I had to guess, I would start by testing the ignition module. Most parts stores can test this if you remove it and carry it to them.

misfires are more from faulty injectors / leaking injectors so check the codes as the misfire code will indicate the problem cylinder
exampl code p0300 is random misfires and codes p0301 through to p 0308 is the cylinder ie p 0303 is no 3 cylinder

# 3 cylinder misfire (PO303) if code is
actually correct for your problem,nothing
to do with spark plugs,ignition problem

Gear ratio does point to an internal transmission issue. The misfires can easily be diagnosed by swapping thing around and seeing if the code follows. For example misfire in cylinder number 1 & 2 swap coils to cylinder number 3 & 4 and if the code changes from P0301(2) to P 0303(4) you know you need coils.

That means that number 3 cylinder is misfiring.I would start with replacing the sparkplugs and sparkplug wires first if they have not been changed in the last 50,000 miles or so.If that does not help then you will need to check the # 3 injector for pulse.

http://dodgeforum.com/forum/dodge-caravan/252875-2003-dodge-grand-caravan-misfire-on-cylinder-3-a.html

P0303 means misfire on number 3 cylinder. It could be a spark plug, spark plug wire, coil pack, or maybe fuel injector. What ever it is, the number 3 cylinder is the problem.

it means that the computer detected a misfire on cylinder #3. i would change your spark plugs and maybe the wires and see if it fixes the problem

Hello I need a help.
I have 1999 lincoln town car 4.6L V8.They have check engine light on. P 0303 cylinder 3 missfire.
I was changed spark plugs,fuel filter. check compression test 150psi. fuel pressuer 50.
swiching cylinder 1 to 3 fuel injector and coil. but they still have engine code