Trans slippage and rough running.

[jamdeeper]

Just arrived home from a 200 mile journey. 120 of them on the highway. About 20 or so we're 8% grade hills up and down. The rest was awesome scenery and rock/dirt trails. So quite the haul for my trans running 33s. But nothing I haven't done before.

Anyways. I was about 20 miles from home going about 60-65 mph and got this slipping feeling in the trans. I let off the gas and it was like nothing happened. Couple miles later, same slippage. So I flip on the OBD wifi scanner I have, and I pull 3 codes. One was my evap leak that I was aware of.

The other 2 were for vehicle speed sensor, and the other was for the torque converter clutch circuit. So that explained my slippage.

Getting off the exit and at the stop light, I'm running really rough. Probably 5 cylinders. So I refresh the codes and pull up a cylinder 5 misfire. But now my speed sensor code is gone. ??? I limped it home and just parked it. I'm hoping maybe I just burned through a wire and shorted something out. But I haven't hopped under it yet. (It's dark)

My question is, if I can just replace a couple sensors, will that solve the rough running too? Are those 2 "systems" tied together somehow? Im kinda bummed about this. I have a brandy new motor with 3k miles on it and I run into this.

Thanks in advance. http://images.tapatalk-cdn.com/15/09/05/7b8848f44b5b610beb7cd4099193009d.jpg


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[4.3LXJ]

Shelby, it would help if you went to the User CP and filled in the vehicle info so we can scroll it down and see it. But to answer your question, if the VSS is not working, I doubt you could get the torque converter to lock up. It needs to be at a specific speed before it will do that. As for the misfire, if you weren't running hot at the time, you might have a plugged injector or a bad plug wire.

[jamdeeper]

Eh been meaning to do that. Sorry.

2000 auto distributorless.

I didn't really notice a loss of power but at the stop light, it really sounds/feels like I'm running on 5 cylinders. I was running at 215F (according to the app) at the stop light. That was the first thing that crossed my mind, but I am also a gauge stalker..


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[4.3LXJ]

You can run a tank of premium in it. We had a 98 TJ that would misfire on #6 with regular, but not on premium

[jamdeeper]

You can run a tank of premium in it. We had a 98 TJ that would misfire on #6 with regular, but not on premium


After 3000 miles of not having an issue? I've had misfire issues on this jeep and fixed it with copper core plugs, and now that's all I run. I guess I'll swap injectors around, maybe one failed? I hopped under it just now and don't see anything out of the ordinary. My snapshot shows my info at the time of the misfire. http://images.tapatalk-cdn.com/15/09/06/e4dd3359798de39f287f1faddaaaef84.jpghttp://images.tapatalk-cdn.com/15/09/06/a185768e3ff90b041e36f110573f9270.jpg



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[jamdeeper]

What are the chances of a frozen lifter?


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[4.3LXJ]

Does it go tick, tick, tick?

[jamdeeper]

It was. Now that I think about it, it stopped ticking when the misfire came around. I just put 2 and 2 together....


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[jamdeeper]

It wasn't a major tic tho. Nothing I haven't heard before. And it would go away once oil came up.


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[4.3LXJ]

Lifters don't freeze, they just collapse and the valve doesn't lift up as high. But they still run. First thing to do is let it idle at night and see if any of the wires have sparks going off them. Then pull the plug on the dead one and take a look see at it.

[jamdeeper]

Lifters don't freeze, they just collapse and the valve doesn't lift up as high. But they still run. First thing to do is let it idle at night and see if any of the wires have sparks going off them. Then pull the plug on the dead one and take a look see at it.


I don't have wires. I'm distributorless. Found this...

https://vimeo.com/138477357


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[jamdeeper]

Hitting the valve cover?
http://images.tapatalk-cdn.com/15/09/06/43b147eeca0f7d62335b481341a86ca3.jpghttp://images.tapatalk-cdn.com/15/09/06/2018c4f11ed3e89cf359dc5812a5b139.jpg


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[jamdeeper]

Yay.

https://vimeo.com/138478782


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[4.3LXJ]

That is a loose rocker arm. Make sure it is tightened down

[jamdeeper]

They are very tight.


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[4.3LXJ]

You can try starting it and looking at it and see if the lifters pump up. They can wear a little and get pumped down.

[jamdeeper]

You can try starting it and looking at it and see if the lifters pump up. They can wear a little and get pumped down.


Is this something I can fix? Why do valves get stuck? The pushrod will "squish" down if I push it. Is that right? I've seen videos of just lubing up the valve and giving it a little whack to loosen it up.. I have good oil pressure, and oil comes up and through when I start it. But why would it freeze up in the first place? With 3000 miles...... But I do think my old pushrods and rockers were used. Tho, I did have brand new valves put in.


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[4.3LXJ]

I don't know, there are several reasons a valve can get stuck. Intake or exhaust?

[jamdeeper]

Both rockers on cylinder 5 seem loose... But more the intake valve. I hand cranked the engine and noticed even more room in between the intake valve. (3rd rocker from the rear)(as seen in the 2nd video)


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[jamdeeper]

I can also press down on the valve and it will move down... Maybe a 1/16".. But doesn't come up to put pressure on the rocker.


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[jamdeeper]

I've been researching for the past few hours. I have some more questions...

My cam rolls my lifters, that push my pushrods. But are lifters supposed to squish? Excessively? Probably not.

If my lifter is "collapsed" it wouldn't push the rod to open my intake valve. If my intake valve is closed because it isn't able to be opened, where is the fuel going?

If it's collapsed, I've read throwing mystery oil in it or some other sorts like sea foam Then changing the oil to maybe unstick it? Or will it just happen again?

Considering the lifters use oil to "pressurize" to absorb the backlash, is it a sense of a clogged oil port on the lifter?

None of the other rockers are squishy. And I'm leaning towards this dreadful news.


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[4.3LXJ]

One other thing you need to check. How much does the pushrod rise in relation to the others. In other words, make sure you don't have a flat lobe on the cam

[jamdeeper]

One other thing you need to check. How much does the pushrod rise in relation to the others. In other words, make sure you don't have a flat lobe on the cam


What are the possibilities of that on 3000 miles?


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[4.3LXJ]

I don't know. Mudderoy lost a cam with that kind of milage

[jamdeeper]

When I put pressure on the rocker while it's running, it seems like it has the same amount of lift As the others. When it's off, I can squish the lifter and hear the oil squish out of it... None of the others will squish.. I am getting oil threw all other rods but 5's intake rod. The valve sides are even with the lifters off, so I know the springs are fine. But my rocker just floats there.


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[jamdeeper]

Are there 2 holes on the rockers? Input/ output? Probably not, but I'm just confused as to why I can squish oil out, but it won't "suck" it in to pressurize it....


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[4.3LXJ]

It sounds to me like you have a collapsed lifter