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  #1  
Old 02-22-2017, 06:44 PM
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Default engine vibration
Noticed a vibration in my engine 468 stroker had it do something similar before and it was the crank pulley cracked. Thought maybe again but i just took it off and this one looks fine and i even fired it up and the vibration was still there . seems to smooth out when i rev it up but shows up when it comes down? Any ideas? its a std trans makes no diff if i push the clutch in

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Old 02-22-2017, 11:06 PM
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Sounds like its skipping.
An internal out of balance wont come and go.

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Old 02-22-2017, 11:19 PM
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???

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Old 02-23-2017, 12:40 AM
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I bet he meant misfire, if so, I was thinking the same. Only out of balance that I could see come and go is possibly a clutched fan? Missing a blade?

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Old 02-23-2017, 02:41 PM
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I had a vibration for months. Finally found that my oil pan was barely touching the frame.

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Old 02-24-2017, 12:21 AM
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I bet he meant misfire, if so, I was thinking the same. Only out of balance that I could see come and go is possibly a clutched fan? Missing a blade?
Maybe misfire I took belts off and lower pulley and it still does it.It has SAT all winter

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Old 02-24-2017, 01:07 AM
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It's still winter, just hasn't felt like it for a little while. It WILL be cold soon.

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Old 02-24-2017, 01:25 AM
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If you have a timing light, clamp the inductive pickup around each plug wire, one at a time, and hit the trigger. Watch for a nice steady spark. If you see it not firing, or firing intermittently, then you probably have a plug fouling out, or possibly a bad plug wire.

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Old 02-25-2017, 11:16 AM
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If you have a timing light, clamp the inductive pickup around each plug wire, one at a time, and hit the trigger. Watch for a nice steady spark. If you see it not firing, or firing intermittently, then you probably have a plug fouling out, or possibly a bad plug wire.
Good call I just got a new cap and rotor for it anyway I was thinking maybe getting one of those heat reading guns and trying that too. It will have to wait just got more snow and temps supposed to get warmer by end of next week 20s now brr

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Old 02-25-2017, 11:54 AM
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The light will still blink with a fouled plug.
You must cancel one cylinder at a time to preform a power balance..
The safest way is with some insulated plug wire pliers an the distributor cap.

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Old 02-25-2017, 12:43 PM
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I have found several bad plugs with the light trick. If the plug doesn't fire, it doesn't complete the circuit, and the light doesn't flash. That has been my experience from using this trick since the 80's. It just doesn't isolate whether it's the plug or the wire. But at least it shows which cylinder isn't firing.

Or you can buy this for cheap.

https://www.amazon.com/Lisle-26900-S...ug+Wire+Tester

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Old 02-25-2017, 04:21 PM
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Originally Posted by archerytony View Post
Good call I just got a new cap and rotor for it anyway I was thinking maybe getting one of those heat reading guns and trying that too. It will have to wait just got more snow and temps supposed to get warmer by end of next week 20s now brr
No need for a Infrared heat gun. Get a squirter with water and you will be able to pick out the colder pipe.

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Old 02-25-2017, 04:26 PM
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No need for a Infrared heat gun. Get a squirter with water and you will be able to pick out the colder pipe.
Heck, my brother used to spit on them. But he was a Chevy guy.

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Old 02-26-2017, 04:55 PM
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Loose bolts for the converter?

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Old 03-01-2017, 01:41 PM
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Loose bolts for the converter?
std trans

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Old 03-01-2017, 01:41 PM
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Heck, my brother used to spit on them. But he was a Chevy guy.
Thats funny right there!

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Old 03-01-2017, 01:43 PM
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No need for a Infrared heat gun. Get a squirter with water and you will be able to pick out the colder pipe.
Thats true Ted I was figuring on getting a infrared gun anyways. Thanks

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Old 03-01-2017, 01:46 PM
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Originally Posted by gtofreek View Post
I have found several bad plugs with the light trick. If the plug doesn't fire, it doesn't complete the circuit, and the light doesn't flash. That has been my experience from using this trick since the 80's. It just doesn't isolate whether it's the plug or the wire. But at least it shows which cylinder isn't firing.

Or you can buy this for cheap.

https://www.amazon.com/Lisle-26900-S...ug+Wire+Tester
Just got snow again last night and snowing now too YUK! As soon as we get a little nicer out i will dig into it some more and let you guys know what i find

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