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[FIXED] 2010 jeep wrangler 3.8 other shop installed new engine, long crank P0339
other shop installed reman engine, I dont know what company built it. . vehicle keeps throwing p0339 . here is what i have done so far, replaced after market sensor with mopar , CKP. tested wires from pcm to ckp. my 5 volt ref is good . my sensor ground is good ( and they are shared by other sensors) . wires to sensor ohm good, load test good , no short to ground or each other . also scoped crank and cam signals , look ok. I really an leaning towards wrong flexplate ? anyone, have any ideas
i am going to pull trans ...... i really an thinking flexplate, customer said it came with a new one , but that dont make it good. i dont know what else to check......thanks for the help. what do you think?
Thanks for the help. I try not to be a parts changer.... sometimes it hard when your handed something the last guy gave up on..I really appreciate the help. I will let you know what i find... You do have a sharp eye... honestly i did not notice it ... but it is definitely there . Thanks again , ED:cheer
Tyler wrote: I dunno if I'm nitpicking here? But something about this section bothers me
That missing tooth part looks OK to me. It falls during the first CMP pulse and rises at about the time the 2nd CMP pulse falls.
What does look wrong is the wide CKP tooth. On the known good it's 3 regular teeth but on the OPs trace it's only two. And the known good has 16 regular teeth left of the big tooth and 15 to the right of it. The OPs has 16 to the right.
I would've marked up the pictures to show this better but no right click
Thanks , than it would have to be the flexplate...... i see waht you are saying, i just was not certain if what he posted was for this vehicle... Thanks
I suspect the flex plate has had an extra notch punched in it. This pic I found shows the high sync being 3 regular teeth wide just like the known good.