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No fire at coil

Customer Question
no fire at coil
Submitted: 2 years ago.Category: Jeep
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Customer reply replied 2 years ago
jeep run then stop running no ignition fire
Answered in 2 hours by:
8/15/2015
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago
Amedee
Amedee, Jeep Technician
Category: Jeep
Satisfied Customers: 27,095
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Verified

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

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Customer reply replied 2 years ago
1j4gs58n05c533908
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago

Hello! It says invalid vin..

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Customer reply replied 2 years ago
1J4GS58N05C533908
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago

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

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Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago

Are there any codes in the computer?

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Customer reply replied 2 years ago
I have replace crank sensor cam sensor and new ecm no codes
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago

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

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Customer reply replied 2 years ago
5.2
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago

Excellent! Does the engine have injector pulse?

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Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago

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

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Customer reply replied 2 years ago
injector has pulse
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago
do the ignition coils have power while cranking the engine over?
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Jeep Mechanic: Amedee, Jeep Technician replied 2 years 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.
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Customer reply replied 2 years ago
How do check for ground
Jeep Mechanic: Amedee, Jeep Technician replied 2 years 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.

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Customer reply replied 2 years ago
give code p2302 p2305 p2308 p2311 p2314 p2317 p2323 p2320
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago
Clear the codes and see which code comes back first.
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Customer reply replied 2 years ago
Clear code now want start
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago
Ok go over and check for spark and fuel again.
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Jeep Mechanic: Amedee, Jeep Technician replied 2 years 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
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Customer reply replied 2 years ago
Jeep still want start
Jeep Mechanic: Amedee, Jeep Technician replied 2 years 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
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Customer reply replied 2 years ago
Have good compression and fuel fire seem weak
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago
WHat is the fuel pressure at when cranking?
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Customer reply replied 2 years ago
Fuel pressure is 57 psi
Jeep Mechanic: Amedee, Jeep Technician replied 2 years ago
Ok, disconnect the injector connectors from the injectors and see if the engine will start and run on starting fluid.
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Customer reply replied 2 years ago
No want start
Jeep Mechanic: sprinkles08, ASE Certified Technician replied 2 years ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 23,510
Experience: Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
Verified
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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Ask sprinkles08 Your Own Question
sprinkles08
sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 23,510
23,510 Satisfied Customers
Experience: Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist

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