Question about 2003 Mitsubishi Galant

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0304 code -Keep getting Cylinder 2 misfire code Mitsubishi galant

I have replaced the ignition coil on Cylinder 2 of my Mitsubishi galant twice and it will work for about a month and then go bad. Which tellls me it is not the parts I am using but something with my car. What coould it be. I have had my car checked for leaks and had the pressure checked. My catalytic converter needs to be replaced on my car, but could it really make this ONE cylinder keep going bad???

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Code 304 is number 4 cyl,check the plug insulator for white(arch) markings-if you see any markings replace the insulator

Posted on Aug 31, 2009

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Check to make sure you have a good ground to the coil you can even try running another ground wire to the ground wire at the coil connector this is usally caused by a ground wire loose on the fender close to te battery but it may be some where else I would check that and run a extra ground spliced in at the connector by the coil just to make sure it has a good ground

Posted on Jul 03, 2009

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1 Answer

Error code P0300


code po300 refers to random/multiple cylinder/s--misfire/s detected.===causes-- spark plug/s--HT leads /s--injector /s--ignition coil/s--low compression ---wiring
Check that the HT leads are not touching each other causing spark cross over . Ensure that the coil wires are properly connected . From what you have done, I would revisit everything ( all connections ) to ensure that everything is in order including firing order of the leads

Apr 20, 2014 | 1999 Mitsubishi Galant

1 Answer

Random multiple misfire P0300, P0302, P0304 on 2006 Kia Rio


A competent mechanic will check all probable causes associated with these DTC codes.
Code P0300: Random-Multiple misfire detected. Probable causes:
1. Vacuum leaks, damaged hoses, or improper routing
2. Fuel contamination
3. Ignition system - Ignition module, coil, spark plugs and wires
4. Fuel system
Code P0302: Cylinder 2 misfire detected. Probable causes:
1. Control unit software in need of updating
2. Faulty PCM or ECM
3. Faulty fuel injector
4. Ignition system
5. Fuel system
Code 0304: Cylinder 4 misfire detected. Probable causes:
1. Control unit software in need of updating
2. Faulty PCM or ECM
3. Faulty fuel injector
4. Ignition system
5. Fuel system

Be sure the invoice enumerates all of these probable causes as having been checked. Also, some of the replacement parts installed earlier may be faulty.

Jan 19, 2014 | Kia Cars & Trucks

1 Answer

WILL A BAD PCM CAUSE MY 2001 GALANT TO MISFIRE ITS GIVING A CODE OF P0300


code p0300 refers to random/multiple cylinder/s --misfire detected.===causes spark plug/s---HT lead/s---injector/s--ignition coil/s---low compression---wiring. NOTE--Injectors may also include low fuel pressure in the manifold

Sep 22, 2013 | 2000 Mitsubishi Galant

1 Answer

Code p0303


SWAP COIL PACKS to another Cylinder... See if it Follows the Coil Pack

2nd, Swap the INJECTOR to another Cylinder.. See if it follows the Injector.

You will get your Answer

Apr 12, 2013 | 2003 Mitsubishi Galant

1 Answer

2003 Mitsubishi Galant 2.4 cylinder 3 misfire


on thesae oldr cars 2 and 3 cylinder fire together same as 1 aND 4 ,without head under the bonnet i honestly couldnt tell you the answer but i might be inclined to suspect a valve not seating correctly all the time

Mar 27, 2013 | 2003 Mitsubishi Galant

1 Answer

Why would # 2 keep showing a misfire plug is new


It could be a bad plug wire. Swap the wires with another cylinder and see if the misfire also moves with the wire. Or a bad Coil/Dist Cap.

Dec 28, 2010 | 2003 Mitsubishi Galant

1 Answer

Have a 2000 mits galant-4 cy- misfire on cylinder 2 -Is there a way to check it or test- have already changed out wires connected to ignition coil.


You can buy a coil tested from advanced auto for 10 dollars to identify the spark. Have you checked compression?

Nov 24, 2010 | 2003 Mitsubishi Galant

1 Answer

2003 mercedes Benz C240 codes P0300, P0301, P0302 and P0303. Please, help me how to fix?.


P0300 Random Misfire Detected
P0301 Cylinder 1 Misfire Detected
P0302 Cylinder 2 Misfire Detected
P0303 Cylinder 3 Misfire Detected
according to this fault codes first mark ignition coils
3 ---------------- 6
2 ---------------- 5
1 ---------------- 4
RB-------------LB
this right banks and left bank, please remove Ignition coils with lids and spark plugs from right bank and swap with left bank, if fault code change as
P 0304 Cylinder 4 Misfire Detected
P 0305 Cylinder 5 Misfire Detected
P 0306 Cylinder 6 Misfire Detected
You can Identify it's a faulty ignition system then next swap ignition lids from ignition coils be careful each coils have two lids one short and other long bit deference and when you remove and fix it to the car keep in mind correct order because each coil two different fire for two spark plugs don't mix up, if you mix it can create the fault code.if you detect any fault ignition coils or spark plugs or lids replace that and also whether god or bad recommend to replace spark plugs, find the right that's most important thing, if this way couldn't found the any ignition fault next step is check fuel presser, when the engine running fuel presser must be around 4.5 bar without engine running must be 4 to 6 bar if the fuel presser too low need to check two different things one is fuel pump other is fuel injectors, in this case you can swap injectors from right bank to left bank and find is the injectors leaking, if not leaking faulty fuel pump.is this information helped you? if yes please leave a comment,

Oct 15, 2010 | 2007 Mercedes-Benz C230 Sedan

1 Answer

My 2002 Mits Galant has a #2 cylinder misfire. I have replaced the spark plugs(#2 contact broke off, cylinder was inspected and no problems). I then repaced the coil pack and still nothing has changed.


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 (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.

Try it and keep us updated.

Sep 13, 2010 | 2003 Mitsubishi Galant

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