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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

wierd knock under load....

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Old Apr 24, 2010 | 12:55 AM
  #76  
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Normally I would say flex plate to a description like that ... However typically a flex plate can be duplicated in the yard by holding the brake and giving it gas, so can pipe impacts.

Just to eliminate some things you need to do a plug wire pull test and compression test.

Before doing so clean up any oil in places there should not be oil so you can see leaks.

-Enjoy
fh : )_~
 
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Old Apr 24, 2010 | 12:56 AM
  #77  
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i did that oil thing...i used some heavy duty grease/oil motor stuff and it worked quite well
 
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Old Apr 24, 2010 | 01:06 AM
  #78  
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idk if this help at all but the motor feel extremely under powerd...kinda like the rings r messed up...what all could cause a mystery knock when driving but no other time?
 
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Old Apr 24, 2010 | 10:54 AM
  #79  
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Originally Posted by '83f3fiddy
the motor feel extremely under powerd...kinda like the rings r messed up
Could also be kinda like the EGR valve is stuck, or the timing isn't advancing,
or a number of other things.

As people have been repeatedly telling you, a compression test will answer a LOT
of questions if you're suspicious about the internal health of your engine. Do that
before speculating about anything else on the engine.

Originally Posted by '83f3fiddy
what all could cause a mystery knock when driving but no other time?
Flywheel, flex plate (already mentioned), transmission
Bearings, hubs, U-joints (especially front driveshaft if 4x4)
Shock absorbers, springs
Suspension and steering bushings
To name some of the most common areas....
 
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Old Apr 24, 2010 | 11:24 AM
  #80  
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Originally Posted by ctubutis

Could also be kinda like the EGR valve is stuck, or the timing isn't advancing,
or a number of other things.

As people have been repeatedly telling you, a compression test will answer a LOT
of questions if you're suspicious about the internal health of your engine. Do that
before speculating about anything else on the engine.


Flywheel, flex plate (already mentioned), transmission
Bearings, hubs, U-joints (especially front driveshaft if 4x4)
Shock absorbers, springs
Suspension and steering bushings
To name some of the most common areas....
i havnt had the front shaft on for a while..so its nothing to do with suspention cause its directly related to RPM speed..i dunno if i have a nEGR valve on the motor O_o but i havnt looked at the back of the motor haha would i be able to run the motor with out the vacuum advancement and at 10* or 12* timing?
 
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Old Apr 24, 2010 | 12:59 PM
  #81  
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ok, i went and got a new plug for the motor today. monday (when its cooler) imma go work on it some more..and i still gotta change the plugs in my dodge FML
 
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Old Apr 24, 2010 | 01:09 PM
  #82  
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Originally Posted by '83f3fiddy
(when its cooler)
Wish I had that problem ... I would be outside working on my truck, toys or something instead of inside, in thermals, in front of a heater!!!!

-Enjoy
fh : )_~
 
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Old Apr 24, 2010 | 01:23 PM
  #83  
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**** its liek 89-98 right now...its fcking HHHOOOOOTTTTTTTTTT
 
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Old Apr 24, 2010 | 01:41 PM
  #84  
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Hot ... Thats perf!

I'd give anything to thaw out, In fact we are giving (Basically) our NEW UNFINISHED (At this moment, soon to be) house away just for that reason!

I gotta get out of this freaking cold state, My ol'bones just can't take it any longer!

-Enjoy
fh : )_~
 
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Old Apr 24, 2010 | 01:46 PM
  #85  
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haha

i noticed today my balencer wobbles forward and backward when running..can that be the cause of the knocking?? it moves ALOT maybe a 1/8" each way?
 
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Old Apr 24, 2010 | 06:44 PM
  #86  
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Yes, It would likely do it all the time though.

There is an incredible number of things it could be.

Get the plug wire pull test done, you need nothing to do this and post the results. You might find your knock.

-Enjoy
fh : )_~
 
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Old Apr 24, 2010 | 11:04 PM
  #87  
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im taking tomorrow off and working on both my trucks..the dodge is getting 8 new plugs..and ill do the plug test on the ford...
 
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Old Apr 24, 2010 | 11:20 PM
  #88  
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I don't get it, Hide from the sun on a day off, Then take a day off work, to work on your trucks...

-Enjoy
fh : )_~
 
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Old Apr 24, 2010 | 11:55 PM
  #89  
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i have all my days off hahaha
 
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Old Apr 25, 2010 | 07:32 AM
  #90  
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look closely at the balancer, can you move the outer ring
on the inner?
 
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