It fell on its face !

[Stan H]

Impressed!!
In a couple things, that the truck has preformed so well, and that you figured out (fixed) the issue so quick! Nice work! My 21 JTR has been the best vehicle I've owned (knock wood) !
Brings me to a question... is there a good comprehensive workshop manual anywhere?? I do a fair amount of work on my vehicles, but I feel this thing is a giant rolling computer... and an electrical engineer I'm NOT.

I am sure there probably is havent went that far looking. Probably can order.

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[Stan H]

Two failed in short succession. One at 11k after install, the second at 12k ish.

Wow that's crazy.. so the higher powered ones burn out quick.. interesting

 

[Stan H]

Impressed!!
In a couple things, that the truck has preformed so well, and that you figured out (fixed) the issue so quick! Nice work! My 21 JTR has been the best vehicle I've owned (knock wood) !
Brings me to a question... is there a good comprehensive workshop manual anywhere?? I do a fair amount of work on my vehicles, but I feel this thing is a giant rolling computer... and an electrical engineer I'm NOT.

Honestly I credit 3 things to the longevity of the trucks drive train.
1. Engine oil is 0W-20 Amsoil Signature series .
Use the oil change interval
When it gets to 50% I slap in a fresh filter when it gets to around 10% I change oil.
2. My axles and transfer case have all been changed to amsoil.
3. Transmission is Chrysler 8&9 speed and it has been changed along with filter one time.

That's the first part I ever had to put one this beast !!!!!!
2 pics...
first is miles on this oil change .
Second is percentage left.
I am picking up new oil in the morning from my local Amsoil guy.
I swear by that stuff.

 

[Stan H]

What's the interval on replacing the coils? I ask because some are as low as 60-70K miles and almost always by 100K-ish. The only vehicles I've heard chunking coils with mileage that low were old MkIV VW's.

I know sparkplug are 160,000 on the interval chart . So I say coil packs get changed at the exact same time. IMHO

 

[BourbonRunner]

I know sparkplug are 160,000 on the interval chart . So I say coil packs get changed at the exact same time. IMHO

I would think so. Any time I've done plugs on any distributor-less ignition I've swapped coils whether they needed it or not. Usually it will idle smoother afterwards.

You ever look down the barrel of a used coil? I've often thought that the oxidation/discoloration present has to mess with the electrical impedance and retard spark but I don't know for certain.

Distributors were so much easier :P

 

[WILDHOBO]

What's the interval on replacing the coils? I ask because some are as low as 60-70K miles and almost always by 100K-ish. The only vehicles I've heard chunking coils with mileage that low were old MkIV VW's.

I live at high altitude, so originally installed them to reclaim a few of my lost horsepower, without the risks associated with superchargers. So I replaced them before any of them had failed. But as much as I liked how it performed, I’m not dealing with coils that only last 11-12k miles. The expectation given was 40k miles. I’d have been fine with anything in that ballpark.

 

[WILDHOBO]

Wow that's crazy.. so the higher powered ones burn out quick.. interesting

I expected quicker than Oem by far, but that’s too fast. They did allow me to return them for refund, so there’s that.

 

[BourbonRunner]

I live at high altitude, so originally installed them to reclaim a few of my lost horsepower, without the risks associated with superchargers. So I replaced them before any of them had failed. But as much as I liked how it performed, I’m not dealing with coils that only last 11-12k miles. The expectation given was 40k miles. I’d have been fine with anything in that ballpark.

Interesting. I didn't know altitude was a factor for ignition. For air density, sure. Then again I don't know much about coils aside from what they're for and how to replace them.

Only car Ive ever had coils go up was my MkIV 1.8T VW. Two blew at the same time around 15K-ish. On a 4-pot turbo that was a VERY slow drive in limp mode to the dealer. Parts guy had them on the desk when I got there and I swapped all 4 in the lot. The service manager took the old ones presumably for them to send to VW- They were completely blacked out inside. Almost like it caught fire.

Come to find out there was an issue with the seal on the housing from Bosch's manufacturing process. A tiny amount of moisture, even high enough ambient humidity could get past the seal, hit the wiring of the coil and soon as it sees a charge- KABLOOEY. Wonder if that's what happened to yours?

 

[WILDHOBO]

Interesting. I didn't know altitude was a factor for ignition. For air density, sure. Then again I don't know much about coils aside from what they're for and how to replace them.

Only car Ive ever had coils go up was my MkIV 1.8T VW. Two blew at the same time around 15K-ish. On a 4-pot turbo that was a VERY slow drive in limp mode to the dealer. Parts guy had them on the desk when I got there and I swapped all 4 in the lot. The service manager took the old ones presumably for them to send to VW- They were completely blacked out inside. Almost like it caught fire.

Come to find out there was an issue with the seal on the housing from Bosch's manufacturing process. A tiny amount of moisture, even high enough ambient humidity could get past the seal, hit the wiring of the coil and soon as it sees a charge- KABLOOEY. Wonder if that's what happened to yours?

No ignition issues at altitude, but better ignition is a way to increase power, ever so slightly, when air is this as balls.

The one on cylinder 3, which hadn’t yet failed, came apart in three pieces during removal. Terrible seal to the boot.

 

[ShadowsPapa]

Yes you are correct couldnt belive how much power it lost over that. It was the camshaft sensor

Makes total sense if you see the number of degrees these cams can be tweaked when running. In the old days, we "degreed the cam" during install - you could retard or advance timing to shift the power curve up or down. These do it on the fly and if that thing is wrong - oops!

 

[Charles 236]

If I remember correctly, the intake camshaft phaser has 70 degrees of adjustment range, the exhaust is 50 degrees.

 

[ShadowsPapa]

If I remember correctly, the intake camshaft phaser has 70 degrees of adjustment range, the exhaust is 50 degrees.

Yeah - the PUG is 70 intake, early engines were 50 degrees.
They are torque driven rather than oil pressure driven.
The extra range helps mitigate hot-start detonation. They can relieve cylinder pressure during a hot start.

 

[Stan H]

I expected quicker than Oem by far, but that’s too fast. They did allow me to return them for refund, so there’s that.

That was cool what brand ?

 

[WILDHOBO]

That was cool what brand ?

Ripp.

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