I have a 2003 ford mustang has no spark i replaced the ignition coil but still no spark,i think it has a bad pcm

That cutting out is a misfire . P0351 You have a bad coil ,wiring ,or PCM problem .
P0351 Through P0360 - Ignition Coil A through J Primary/ Secondary Circuit Malfunction Each ignition primary circuit is continuously monitored. The test fails when the PCM does not receive a valid IDM pulse signal from the ignition module (integrated in PCM).

• Open or short in Ignition START/RUN circuit
• Open coil driver circuit in harness
• Coil driver circuit shorted to ground
• Damaged coil
• Damaged PCM
• Coil driver circuit shorted to PWR

Ford 5 4 shorted coil primary winding and bad computer driver This video is on a 5.4 L expedition , but that does matter . It's a ford an your mustang works the same way , coil on plug ignition .

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 ...

answers.edmunds.com > Edmunds Answers

When you turn ignition key on ( not start ) does the checking light ,light ? Check fuse's for PCM , are they good ? Find a wiring diagram an check power an ground at PCM . Also hook up a scan tool an see if it will communicate with the PCM . That's how you check the PCM ! Also check the constant control relay module , these go bad an they have fuel pump relay , power hold relay , this powers up fuel injectors an ignition system !

Clarify year of mustang?

303= cylinder #3 misfire the 316 is just another code for misfire detected during start up:
I would say buy a new plugs and wires, this will correct the problem, Tim

• 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

Hi hope I can help.
1.Fist change the spark plug. this is the main cause of most misfires,
2.If that don't work switch your coils. (remove one of your other coils and switch it with the #3 coil. If the misfire moves to the other cylinder then you know you have a bad coil and it need to be replaced.
3.preform a compression test.
4 Also check your fuel pressure.
Hope this helps
Please leave feed back
Thank you urnuts73@ FixYa

the engine is misfiring under a load, the most common cause is a bad spark plug , bad spark plug wire or a bad ignition coil. in any case a good old fashioned tune up should take care of it......HAVE FUN

P0354 - Ignition Coil D Primary/Secondary Circuit Malfunction.

Description of DTC:
The ignition signal from the Powertrain Control Module (PCM) or Electronic Control Module(ECM) is sent to and amplified by the power transistor. The power transistor turns ON and OFF the ignition coil primary circuit. This ON/OFF operation induces the proper high voltage in the coil secondary circuit.

Symptoms:
- Lack/Loss of Power
- The engine may be harder to start
- Engine hesitation
- Check Engine Light On
- No spark

Possible Causes:
- Open or short in the ignition coil circuit
- Ignition coil circuit shorted to ground
- Ignition coil connector
- Damaged ignition coil
- Damaged PCM or ECM

Possible Solutions:
- If damage, repair ignition coil circuit
- Replace ignition coil
- Replace PCM or ECM


P0355 - Ignition Coil E Primary/Secondary Circuit Malfunction.

P0356 - Ignition Coil F Primary/Secondary Circuit Malfunction.

You check the right firing order?

1991 Ford Mustang 2.3 liter SOHC L4





1991 Ford Mustang 5.0 liter V-8 HO



Also, need check the PCM for someone short; sometimes this is the reason it wasn't sending a signal to the coil. You have constant power at the coil but the ground signal doesn't fluctuate from on to off while the engine is cranking. If the hall effects switch in the distributor is bad it won't tell the PCM when to fire the coil and the hall effect switch also operates the tachometer. So if this switch is bad the tach and the coil would not work.

Good luck.

Replace the wires from the the ingnition module from the coil.