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sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 22301
Experience:  Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
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No fire at coil

Customer Question

no fire at coil
Submitted: 1 year ago.
Category: Jeep
Customer: replied 1 year ago.
jeep run then stop running no ignition fire
Expert:  Amedee replied 1 year ago.

Hello and welcome! My name is ***** ***** I can assist you with your question. Can I start by getting your VIN?

Customer: replied 1 year ago.
1j4gs58n05c533908
Expert:  Amedee replied 1 year ago.

Hello! It says invalid vin..

Customer: replied 1 year ago.
1J4GS58N05C533908
Expert:  Amedee replied 1 year ago.

Thank you for the VIN! It comes up as a 2005 Cherokee

Expert:  Amedee replied 1 year ago.

Are there any codes in the computer?

Customer: replied 1 year ago.
I have replace crank sensor cam sensor and new ecm no codes
Expert:  Amedee replied 1 year ago.

Does the MAP sensor have a reference voltage going to it with the key on? If so, how much?

Customer: replied 1 year ago.
5.2
Expert:  Amedee replied 1 year ago.

Excellent! Does the engine have injector pulse?

Expert:  Amedee replied 1 year ago.

This would go so much after if you call me on the phone.

Customer: replied 1 year ago.
injector has pulse
Expert:  Amedee replied 1 year ago.
do the ignition coils have power while cranking the engine over?
Customer: replied 1 year ago.
Expert:  Amedee replied 1 year ago.
that would indicate that the PCM is not grounding/activating the ignition coils to produce spark. That only leaves a faulty input or a bad PCM.
Customer: replied 1 year ago.
How do check for ground
Expert:  Amedee replied 1 year ago.

You can use a test light or even a noid light. The same tool you would use to check injector pulse. Plug it into the ignition coil connector and it should blink as you crank the engine over.

Customer: replied 1 year ago.
give code p2302 p2305 p2308 p2311 p2314 p2317 p2323 p2320
Expert:  Amedee replied 1 year ago.
Clear the codes and see which code comes back first.
Customer: replied 1 year ago.
Clear code now want start
Expert:  Amedee replied 1 year ago.
Ok go over and check for spark and fuel again.
Expert:  Amedee replied 1 year ago.
Hello!
It's Amedee from just answer. I am just checking in to see how things are going and to see if you need any further assistance?
Let me know!
Amedee
Customer: replied 1 year ago.
Jeep still want start
Expert:  Amedee replied 1 year ago.
Right, that is because you have not diagnosed the problem yet.
Check for spark, fuel and compression.
Let me know what your missing.
Amedee
Customer: replied 1 year ago.
Have good compression and fuel fire seem weak
Expert:  Amedee replied 1 year ago.
WHat is the fuel pressure at when cranking?
Customer: replied 1 year ago.
Fuel pressure is 57 psi
Expert:  Amedee replied 1 year ago.
Ok, disconnect the injector connectors from the injectors and see if the engine will start and run on starting fluid.
Customer: replied 1 year ago.
No want start
Expert:  sprinkles08 replied 1 year ago.
Hello and welcome to JustAnswer!
You're setting a code for all eight coils. If the coils have ASD voltage when cranking then you either have to have eight failed coils, a wiring issue with each of them, or a failure within the PCM.
Did the engine die while driving?
Did the problem happen after a repair, accident, jump start, etc?

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