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1984-2001 Jeep Cherokee Rear Leaf Spring (4 Leaf) Pair1984-2001 Jeep Cherokee Front Upper & Lower Control ArSwag Off Road BIG-HIT TJ-YJ Rear Bumper

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Unread 07-29-2013, 10:41 AM   #826
Matt1981CJ7
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Quote:
Originally Posted by 2Xtreme View Post
Even if it only occurs under load?

It revs fine when parked.....
Centrifugal is dependent on RPMs.

Vacuum advance is dependent on load. Under heavy load there should be no vac advance at all. Have you ever test driven with the vac advance disconnected and plugged? If so, does it still ping?

Are you sure it's detonation that you are hearing?

Matt

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Unread 07-29-2013, 10:52 AM   #827
2Xtreme
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Quote:
Originally Posted by Matt1981CJ7 View Post
Centrifugal is dependent on RPMs.

Vacuum advance is dependent on load. Under heavy load there should be no vac advance at all. Have you ever test driven with the vac advance disconnected and plugged? If so, does it still ping?

Are you sure it's detonation that you are hearing?

Matt
I've had the vac advance disconnected and plugged for quite a while now, trying to figure this out. At least a dozen test drives.... Doesn't help.

At this point I'm not sure of anything....

It usually only does it in once it shifts into second. Sometimes at the end of first gear. Don't know about third gear, as I'm afraid to drive it to the point of shifting to third.
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Unread 07-29-2013, 12:13 PM   #828
86cj74.2L
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It appears you need to decide on what your next step is with your current engine.

If your rebuilding the 258 you have as a spare to throw in your jeep I'd buy a reman distributor. And make sure its a 13r / 18r advance head. I think I shown you a picture of the hole you can look in to identify it.

If your going with a V8 I wouldn't sweat it.

The side to side play will make your dizzy fire in a jumpy fashion you can see watching in with a timing light.

Did you consider the berrymans chem dip to try and remove the carbon?
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Unread 07-29-2013, 12:46 PM   #829
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It appears you need to decide on what your next step is with your current engine.

If your rebuilding the 258 you have as a spare to throw in your jeep I'd buy a reman distributor. And make sure its a 13r / 18r advance head. I think I shown you a picture of the hole you can look in to identify it.

If your going with a V8 I wouldn't sweat it.

The side to side play will make your dizzy fire in a jumpy fashion you can see watching in with a timing light.

Did you consider the berrymans chem dip to try and remove the carbon?
My line on the V8 seems ti have withered. So I am picking up another 258 from a member here.
It was running when he pulled it from a Jeep he parted out a while back.
At least that much is known about his engine. My spare - no idea.
Hopefully this one will limp me along until I can do a proper rebuild, or something.

Didn't consider the Barryman's because my initial leakdown test (which I am not 100% confident in) seemed to indicate a blown head gasket between 1 & 2 as well as leaking valves in all cylinders. Maybe I screwed up the test. Had never done one before, so who knows?

I may try another leakdown test with the VC off so I can verify the vales are closed in each cylinder when I do it.

But right now, I've just had it with this engine.
It's obviously gone beyond my experience.
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Unread 07-30-2013, 05:54 AM   #830
86cj74.2L
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There is a AMC 360 for 100 on Craig's list in the Harrisburg PA area.

Only one state away.
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Unread 07-30-2013, 06:25 AM   #831
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There is a AMC 360 for 100 on Craig's list in the Harrisburg PA area.

Only one state away.
Only a 5 hr drive, one way... lol
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Unread 07-30-2013, 09:48 AM   #832
John Strenk
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You can run a leak down test on your spare engine just to see if you did it right. Also check the new one also.
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Unread 07-30-2013, 09:51 AM   #833
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There is a AMC 360 for 100 on Craig's list in the Harrisburg PA area.

Only one state away.
I would love to have that 360 but $100 for the engine and $200 in fuel and toll costs + 11 hour drive....

Almost reasonable...
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Unread 07-30-2013, 10:15 AM   #834
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Quote:
Originally Posted by John Strenk
You can run a leak down test on your spare engine just to see if you did it right. Also check the new one also.
Doesn't a leak down test have to be done on a warm engine?
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Unread 07-30-2013, 04:56 PM   #835
86cj74.2L
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Quote:
Originally Posted by John Strenk

I would love to have that 360 but $100 for the engine and $200 in fuel and toll costs + 11 hour drive....

Almost reasonable...
Your that far from me? May be he'd meet you in Pittsburg.

It won't fit in the Prius I guess.
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Unread 07-30-2013, 06:02 PM   #836
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What's a Prius...???
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Unread 07-30-2013, 06:09 PM   #837
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Ok... Couple questions....

First, I pulled my dizzy apart to check the springs/ weights. The weights seem to be marked differently. One a 10 and one a 16. Is that right?


Also, I noticed my distributor seems to be clocked WAAAY counterclockwise from the photos I've seen. Like 90 degrees or so...



Thoughts?
Either might be nothing..
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Unread 07-30-2013, 08:04 PM   #838
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Dosn't matter really how it's clocked, but rather that number 1 is on number 1 with regards to the firing order...

Man...I have to say I am so friggin' lost where this thread is...and I'm subscribed and up to date...

SC
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Unread 07-30-2013, 08:35 PM   #839
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Man...I have to say I am so friggin' lost where this thread is...and I'm subscribed and up to date...
Welcome to MY world...!!!
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Unread 07-31-2013, 07:17 AM   #840
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Originally Posted by 2Xtreme View Post
Ok... Couple questions....

First, I pulled my dizzy apart to check the springs/ weights. The weights seem to be marked differently. One a 10 and one a 16. Is that right?


Also, I noticed my distributor seems to be clocked WAAAY counterclockwise from the photos I've seen. Like 90 degrees or so...



Thoughts?
Either might be nothing..
Did you check to see if you mechanical advance (the thing with the weights) was moving freely?

You should be able to turn it clockwise (stretching the springs) so that the stop moves from one side to the other side of the 16R opening.
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