Bad Ignition coil - testing?

Tiny
RANDY1955
  • MEMBER
  • 2013 DODGE AVENGER
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Coil on plug it is not the coil so what should I be looking at? I would appreciate the help.
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Tuesday, December 17th, 2019 AT 7:15 PM

15 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

Direct Trouble Code [DTC] P0301 is a DTC for cylinder 1 misfiring. It is usually caused by a bad coil on plug [COP], bad spark plug, or bad fuel injector. Also you should inspect the wiring on the fuel injector or the COP and the electrical connector for unwanted resistance. In the diagrams down below I have included the Engine Management wiring diagrams for your vehicle along with guides on how to find opens in an automotive electrical circuit, and how to find unwanted resistance in an automotive electrical circuit using voltage drop. You will need to use a Digital Multi Meter [DMM] to use these guides, so here is a link below explaining how to use one, if needed:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

This guide can help as well

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Please go through these guides and get back to us with what you find out.

Thanks,
Alex
2CarPros
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Tuesday, December 17th, 2019 AT 9:12 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

There are a number of things that can cause a misfire. See the attached pic. Also, take a look through this link and see if anything helps.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

With that, are you getting spark to the cylinder 1 spark plug? Have you checked fuel pressure?

Let me know what all was done so far and how you determine the coil is good.

Take care,

Joe
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Tuesday, December 17th, 2019 AT 9:13 PM
Tiny
JIS001
  • EXPERT
Chrysler deleted SB 18-079-16 from there files and I cannot find it. So they came out with a new bulletin that includes a new trouble code with the running rough condition. The symptoms is running rough and a warranty enhancement for a software upgrade for this condition. You will need to call Chrysler to see if it applies to your vehicle. Here is the bulletin and hope the info helps:
2013 Dodge Avenger

L4-2.4L

Flash: Power-train Diagnostic and System Enhancements

Vehicle ALL Diagnostic Trouble Codes ( DTC ) Technical Service Bulletins Flash: Power-train Diagnostic and System Enhancements

FLASH: POWER-TRAIN DIAGNOSTIC AND SYSTEM ENHANCEMENTS

NUMBER:

18-058-17

GROUP:

18 - Vehicle Performance

DATE:

June 14, 2017

THIS BULLETIN SUPERSEDES SERVICE BULLETIN 18-079-16, DATED JULY 18, 2016, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE A NEW DIAGNOSTIC TROUBLE CODE (DTC) FOR 2014 SALES CODE ED3, LOP AND UPDATED FAILURE CODE STATEMENT.

FOR HELP WITH USING wiTECH FOR ECU FLASH REPROGRAMMING, CLICK ON THE APPLICATION S HELP TAB.

THE wiTECH SOFTWARE IS REQUIRED TO BE AT THE LATEST RELEASE BEFORE PERFORMING THIS PROCEDURE.

SUBJECT:

Flash: Power-train Diagnostic and System Enhancements

OVERVIEW:

This bulletin involves reprogramming the Power-train Control Module (PCM) with the latest available software.

MODELS:2013 - 2014(JS)Chrysler 200
Dodge Avenger

NOTE: This bulletin applies to vehicles equipped with a 2.4L I4 DOHC 16V Dual VVT Engine (Sales Code ED3), and a 6-Speed automatic transmission (Sales Code DG2).

NOTE: This bulletin applies to vehicles equipped with a 2.4L I4 PZEV 16V Dual VVT Engine(Sales Code EDG) equipped with a 6-Speed automatic transmission (Sales Code DG2) or equipped with a 4-Speed Automatic VLP Transmission (Sales Code DFF).

SYMPTOM/CONDITION:

**A small number of customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find the following DTC.

P0335 - Crankshaft Position Sensor Circuit (2014 MY Sales Code ED3).**

In addition, customers may experience any of the following:

Rough idle (Sales Code EDG).A Transmission Tip-In bump (Sales Code EDG). Hard to start in cold ambient temps. (Sales Code EDG). Engine idle cycling on cold start in gear. Slight engine surge driving at highway speeds. DIAGNOSIS:

Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all related systems are functioning as designed. If DTCs are present, record them on the repair order and repair as necessary before proceeding further with this bulletin.

For all other customers that describe the symptom/condition, or if the technician finds any of the DTCs perform the Repair Procedure.

REPAIR PROCEDURE:

NOTE: Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts during the flash process.

NOTE: If this flash process is interrupted/aborted, the flash should be restarted.

Reprogram the PCM with the latest software. Detailed instructions for flashing control modules using the wiTECH Diagnostic Application are available by selecting the application s "HELP" tab. Clear any DTCs that may have been set in any module due to reprogramming. The wiTECH application will automatically present all DTCs after the flash and allow them to be cleared.
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Tuesday, December 17th, 2019 AT 9:58 PM
Tiny
RANDY1955
  • MEMBER
  • 2013 DODGE AVENGER
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 130,000 MILES
DTC 301 switched with another cylinder. It followed so not the coil. What now can any one give me an idea what to do next? Thank you
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
STEVE W.
  • EXPERT
Okay, so you have a P0301 and you swapped the coil and it did or didn't follow where you put the coil? Reading your question suggests it did follow the coil and now that cylinder is missing? Or did you mean you moved the coil from #1 to say #2 and it still has the P0301 code and missing on #1? If it is the second one I would probably check the plugs especially if they haven't been changed in a while. Then use a noid light or a test light to check the injector.
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
RANDY1955
  • MEMBER
No, I meant the first one whatever cylinder I put it in it showed as P304 or 303 and so on.I also purchased a new coil did the same thing as the old one checked the new one out primary and secondary it checked out. So now what?
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
STEVE W.
  • EXPERT
Okay, so the misfire follows the coil but a new coil still misses when put on there. That would indicate that the coil was bad but it may have shorted the driver circuit in the PCM. You should have battery voltage on the Brown wire with Blue trace. That is fed from the same fuse as the other coils, but you could have a bad connector. Next would be to check for the driver signal, it is simply the PCM pulling the coil to ground and releasing it. The fastest way to test it would be a simple test light or noid light that will flash when connected in place of the coil. No flash would mean the transistor in the PCM has failed and you need a new PCM.
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
RANDY1955
  • MEMBER
  • 2013 DODGE AVENGER
  • 2.4L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Does any one know the specs for the primary and secondary ohm readings for the coil on plugs?
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
JIS001
  • EXPERT
Posted specs below. Let us know if the information was helpful. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
TAMMYRENEERAINES
  • MEMBER
  • 1997 DODGE AVENGER
I own a 97 dodge avenger and it s not getting fire to the coil. We hooked up a computer to it and it read nothing the motor in it isn't the correct motor but it will work.
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
2CEXPT
  • MEMBER
No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, cap and rotor, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Thursday, September 10th, 2020 AT 5:29 PM (Merged)
Tiny
NOELCAT
  • MEMBER
  • DODGE AVENGER
I have 2 1995 Dodge Avengers with the 2.5L engine. One with 85k miles and the other with 118k. Both distributors have failed and I have traced the problem to the coil pack. One doesn't work at all and the other quits after heating up. Resistance checks per service manual show good !

So, I know these distributors can be remanufactured so someone must have a source for the coil packs. Anyone know where to get these?
Thanks
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Thursday, September 10th, 2020 AT 5:30 PM (Merged)
Tiny
JACK42
  • EXPERT
Sorry, the dealer
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Thursday, September 10th, 2020 AT 5:30 PM (Merged)
Tiny
NOELCAT
  • MEMBER
No, the dealers merely replace the entire distributor. Already tried them.
Whoever remanufactures distributors obviously has access to the coil packs and I want 2 of them.
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Thursday, September 10th, 2020 AT 5:30 PM (Merged)
Tiny
JACK42
  • EXPERT
Sometimes the manufacturer will only release certain parts to shops that do reman work, this may be one of those cases
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Thursday, September 10th, 2020 AT 5:30 PM (Merged)

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