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Author
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Topic: 86 Engine Vibrations help
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1FastLX
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Member # 1178
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posted
 
 
My 86 5.0
has this Vibration Between 1000-1600 Rpm,
it idles fine but once i step on the gas it vibrates till after 1700 RPm and then it runs fine.
i also hear a knocking sound when that it vibrating.
can you guys help me Out.
i changed the Plug wires , and still the same
i haven't pulled the plugs
thanks ![[Frown]](frown.gif)
Posts: 138 | Registered: Apr 2002
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rokcrln
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Member # 2536
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posted
To check for a dead hole start the car and use a pair of rubber handled pliars and pull off one wire at a time from your cap/head coil and see if you notice a change. If you do then their is your dead hole if not look some were else. Hope this helps some.
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71 Bronco stock (for now) w/59k miles.
73 Bronco EFI 351W
71 Chevy PU w/Vett LT1
Posts: 448 | From: Winters Ca. | Registered: Mar 2003
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Hungry Hippo
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Member # 537
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posted
sounds like the harmonic balancer. see if it looks ok, if not, you shouldnt drive it or you can do serious damage
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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1FastLX
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Member # 1178
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posted
quote:
Originally posted by HungryHippo:
sounds like the harmonic balancer. see if it looks ok, if not, you shouldnt drive it or you can do serious damage
What can cause the Balancer to be unbalanced??
can timing be off also??
thanks
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85 Mustang GT
91 2.3 Coupe
The Westside Strangler
Posts: 138 | Registered: Apr 2002
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Stimson
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Member # 51
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posted
The two main parts of the balancer are held together by rubber. Rubber dries up and breaks over time causing the balancer to slip or be out of balance. Your problem can be many things though .... and weird vibrations and noises are very hard to trouble shoot over the internet
Posts: 2373 | Registered: Jun 2000
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Hungry Hippo
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Member # 537
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posted
balancers just get old. most go out at about 100k. your timing can possibly be off if you have adjusted it while the balancer is spun. just take a look at it and see if the rubber ring is in one piece and see if it moves by hand. i reason i think its your balancer is because it sounds rpm related
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05 S4 Avant(wagon)
09 C6 H/C/I
Posts: 2959 | From: east bay | Registered: Nov 2001
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1FastLX
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Member # 1178
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posted
the balancer doesn't have any play.
but it looks like its missing some rubber
heres a couple of pics
thanks
[ April 28, 2003, 10:23 AM: Message edited by: 1FastLX ]
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85 Mustang GT
91 2.3 Coupe
The Westside Strangler
Posts: 138 | Registered: Apr 2002
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Stimson
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Member # 51
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posted
The pictures didn't show.
Posts: 2373 | Registered: Jun 2000
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1FastLX
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Member # 1178
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posted
sorry here are the links
side with out rubber 
with rubber 
thanks
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85 Mustang GT
91 2.3 Coupe
The Westside Strangler
Posts: 138 | Registered: Apr 2002
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