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Engine transplant mostly successful.. 2008 3.8v6 into 2011…

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Hi Chris! Engine...
Hi Chris! Engine transplant mostly successful.. 2008 3.8v6 into 2011 wrangler unlimited... had it running briefly, now we are getting the P0300 code in conjunction with the 108 MAP sensor.It turns over but wont even hint at sparking. FUnny thing with the ignition tho, the key when turned forward to start stays starting after releasing it... only if you turn it back will it stop trying to turn over. Thought that was odd anyway.The cam pos sensor is new, vacuum lines all checked. Battery, starter bench tested all working fine.New plug wires installed, fresh oil. Kind of a weird one here, as everything has been reassembled fine, as I say it was running at one point... Definately something sparky related. Any ideas on the ghosts in this machine? Cheers!jerrod
Submitted: 8 months ago.Category: Jeep
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Answered in 6 hours by:
11/19/2017
Jeep Mechanic: sprinkles08, ASE Certified Technician replied 8 months ago
sprinkles08
sprinkles08, ASE Certified Technician
Category: Jeep
Satisfied Customers: 24,063
Experience: Chrysler/Dodge/Jeep Master Certified, ASE Master and Advanced Certified, Trans and Hybrid Specialist
Verified

Hello and welcome to JustAnswer! I apologize for the extended wait time you experienced, I've only just come online now and would like to assist you with your question.

There are quite a few things that could be causing a loss of spark and it will require some testing to determine exactly what is wrong. It could be a wiring issue, the cam or crank sensor, a broken flexplate, the coil, even the powertrain control module.

It doesn't appear that it has actually been confirmed that spark has been lost. Have you physically checked for spark at each cylinder on at least one bank?

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