PCM replacement, 2013 Jeep GC

[putergod]

I have a Diablo Intune i3. Initially I did a mail order tune with Johan, and his tune sucked worse than a dust buster. MPG were HORRIBLE (9 mpg city, 13 highway) and low end power was extremely lacking.
I finally took it to a guy my friends speak highly of to have a dyno tune performed. This guy uses HP Tuners.
Before he tuned the car, I restored the original backup file from the Diablo to unlock it.
His tune was perfect. MPG back up to pre-modded numbers and low end power was much better.

Now I am having issues that are pointing towards a possible bad PCM.
If I get a replacement PCM with a stock tune and correct VN, can I backup the current tune with the Diablo and restore that tune to the new PCM and have the car back to where it was before the PCM whigged out?

Thanks!
Mike

[MagsTuning]

I'd troubleshoot the TIPM module before I made the commitment to a new PCM.

[putergod]

I'd troubleshoot the TIPM module before I made the commitment to a new PCM.

This is what is happening:

I have a 2013 JGC with a 5.7 HEMI. I have swapped the cam, lifters, pushrods, spings, oil pump, timing chain, belt, tensioner and idler pulleys, coils, plugs, intake manifold, CAI, and hood. It's also been tuned.

About a week ago I started get the following two codes:
P2317 Ignition Coil F Secondary Circuit
P0306 Cylinder 6 Misfire Detected

I swapped coils between 6, 4 and 2, and between 5 and 3. I swapped plugs between 6, 4, and 2.
Codes keep returning immediately and have not moved. Well, first one comes immediately, second after driving for a few minutes.

I replaced the crank and cam position sensors

Got more codes, one for primary circuit on crank position sensor, and random misfires.

Put OEM crank sensor back and and the previous two codes came back (only).

Little while later got a code for the cam position sensor. Put OEM cam sensor back in, and came back to just the two original codes.

I am currently trying to figure out how to test the wires going to the coils to see if the coil is getting the right voltage and how to test those same wires at the PCM to ensure the PCM is putting out the right voltage.

But if it turns out it's not the wiring, it has to be the PCM.

[putergod]

Last night I did the following tests with a DMM:
pulled PCM connectors and toned out between PCM and coil F/6 - continuity was there.
Measured resistance between PCM and Coil F connector - 0.3 Ohms - wire is good
Checked for short to ground to verify wire good - Infinite Resistance - wire is good
Plugged PCM connector back in and checked resistance to ground - ~3 MOhms - Seems like a short to ground on the driver circuit.
Checked resistance to ground on coil B for reference - ~11 MOhms - much higher, but still should be infinite.
Checked resistance to ground on coil D for reference - ~11 MOhms - much higher, but still should be infinite.
Checked resistance to ground on coil H for reference - ~11 MOhms - much higher, but still should be infinite.
Checked resistance to ground on coil A for reference - ~11 MOhms - much higher, but still should be infinite.
Checked resistance to ground on coil C for reference - ~11 MOhms - much higher, but still should be infinite.
Checked resistance to ground on coil E for reference - ~11 MOhms - much higher, but still should be infinite.
Checked resistance to ground on coil G for reference - ~11 MOhms - much higher, but still should be infinite.

Today I disconnected coil F and started the vehicle. Checked for a HZ signal, and there was getting between 120Hz to 300Hz. First minute it was in the KHz range. Checked for DC voltage and it was extremely low, like .003v. I do not know what these signals SHOULD read as though.

Seems like all the coil drivers could be failing.

Thoughts?

Original question still stands. Can I backup the tune on the current PCM with my Diablo, even though it wasn't flashed with a diablo, and restore the tune to a new PCM (that has already been programmed to my VIN) and been good to go?

[MagsTuning]

I believe that the DS handheld will show the "back up" your current tune if as not an original calibration and won't accept it. ← this I'm not 100% sure about but is what I've gathered to understand it to be. Why not just try it then you'll know I mean you don't have to load the custom tune, you can load one of the supplied tunes to check this.

The guy that tuned it with HPT should still have that file on hand. If he doesn't just have him do a read out and save it for later flashing to the new PCM if you end up buying one.

[putergod]

I believe that the DS handheld will show the "back up" your current tune if as not an original calibration and won't accept it. ← this I'm not 100% sure about but is what I've gathered to understand it to be. Why not just try it then you'll know I mean you don't have to load the custom tune, you can load one of the supplied tunes to check this.

The guy that tuned it with HPT should still have that file on hand. If he doesn't just have him do a read out and save it for later flashing to the new PCM if you end up buying one.

He does have the original tune, but there's two issues.
1. He is 2 hours away from me, and driving that far with it running like it is is not advisable. Can't use the replacement, as I can't use the OEM tune due to removing MDS and VVT.
2. He said it would cost another $100 for the license because HPT licenses the PCM by the serial.

[putergod]

I was able to perform a backup, but would still like someone from Diablo to chime in.

Thanks!
Mike

[mikel]

Im not sure I am following here...cliff notes?

[putergod]

Im not sure I am following here...cliff notes?

A few months ago, my Jeep Grand Cherokee with a 5.7 HEMI had a lifter wipe out the cam and bend a pushrod. I rebuilt the upper engine with a performance cam, and other parts, deleting MDS and physically disabling VVT.
I have a Diable Intune i3 that I purchased a few months ago to do a "mail order" tune on my JGC. The mail order tune never got "right" - gas mileage was 8-9 MPG in town, and 13 on the highway. It was also seriously lacking in low end power.
I was recommended a guy that was a couple hours south of me for a dyno tune. I was assured he was really good.
I took the JGC to this guy and paid him for the tune (including a license for HP Tuners for my vehicle). This guy does not use Diablo.
I restored my original tune, to unlock the diablo, and he flashed his base tune, then put it on the dyno.
Tune from this guy was spot on! Mileage back to pre-cam wipe days, and low end power really picked up.

Now, I am fairly certain my PCM is dying. So, my question for Diablo is this:
Can I backup my current PCM tune with the currently un-locked Diablo Intune i3, swap in the replacement PCM that is already programmed for my VIN, and restore the backup from the Diablo Intune i3 and be right were I was before the PCM started acting up?

I was able to successfully backup the tune, but I am still waiting on the replacement PCM.

The reasons this is important:
1. The tuner is 2 hours away
A. Driving on the current PCM is ill advisable ,and could cause other problems.
2. I cannot drive on the replacement PCM without his tune. The replacement PCM will have a OEM tune, including MDS, VVT, and rear O@ sensors

Thanks!

[putergod]

Well, since I got no official answer, I will provide one.

I did a backup of the custom HP Tuners tune onto the diablo. I swapped PCMs with the replacement and restored the backup. It appears to have worked. I got no CELs upon starting the car.