Misfire on #5 cyl

If the light is flashing its because your doing damage to the catalytic converter. Your dumping raw fuel, in other words you have a coil pack not firing. Your gonna have a P code. Either P0300 random multiple misfire, P301 cylinder 1 misfire, P302 cyl #2 misfire, ect... Replace the coil pack on the dead cyl.

Part 3 -How to Test the Ignition Module and Crank Sensor ...

easyautodiagnostics.com > Ford > 2.3L

Mar 1, 2012 - Spark plugs for cylinders #2 and #3 get spark at the exact same time. ...voltage -12 Volts) to both individual ignition coils within the coil pack. ... Ford Mustang or Ranger (or 2.3L Mazda B2300), this is what you'll need ... for this 'Switching Signal' at the coil pack... but you can also test this ... 1991, 1992, 1993.

How to Diagnose a Misfiring Cylinder (2.3L Ford Ranger ...

troubleshootmyvehicle.com > Ford > 2.3L

Apr 3, 2012 - Bad Fuel Injectors can cause a Misfire Condition. ... the ignition system on the 2.3L Ford Mustang or Ranger consists of 2 ignition coil packs, ...

2002 ranger misfire rough idle - Discussion on Topix

www.topix.com > Ford Ranger

Jul 27, 2007 - My truck is giving the code misfire in number 4 cyl. I replaced my spark plugs, Wires, Coil packs (both of them) and all my fuil ... three (3.0L v6) go bad, the fuel/air mixture gets messed up. Judged: 2. 2 ... My truck runs rough only at idle. ...code for ford ranger 2002, 2.3 5speed. truck runs like a champ but that ...

Extremely stumped! I need the best and brightest 1994 Ford ...

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If you had code P0305, I don't know why they would have done anything to the #2 cylinder but if they have already replaced the plugs, wires and injector; here are a few more items to check:
1) Check connections from ECM. Look for any corrosions or bent/broken pins.
2) Check the fuel line pressure
3) Check the engine compression
4) And if the above are good, then you will probably have a defective ECM

the only thing left to replace would be the spark plugs -I would do all the plugs-cheers Denny

I would say its the coil. A crank or cam sensor could cause one cylinder to miss, or go completely dead, but I doubt it would affect two cylinders. And you would get a code for either sensor.

Would need my head under the bonnet to find the answer ,from your description it could now be a injector who knows but take the plug out and see if its all wet and black then go from this point as fault could be a coil pack /valves or fuel injector but as you havent stated year then again it could have a coil on each cylinder or a remove coil pack as you stated it has HT leads (wires)

A code P0305 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Running out of fuel
Poor compression
Defective computer


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.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Check the plugs, wires and coil pack for these two cylinders. Most lilkely it is the coil pack, they work for 2 cyclinders at a time. cylinder motors use 3 and 8 cyl moters use 4 of these. If your und=sure where the coil pack is, follow it backwards from the spark plugs.

Coil pack going bad, spark plug wire going bad, or spark plug going bad.

Check fuel injector and compression in cyl. #5.