This is topic ROUGH VIBRATION AT IDLE in forum Tech Talk at Northern California Ford Owners  .


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Posted by 86 T TOPS (Member # 8855) on :
 
86 GT , GT4O HEADS AND E-303 CAMJUST CONVERTED TO MASS. BUT VIBRATES VERY ROUGH AT IDLE IVED CHECKED ALL VACUM LINES AND THEY ARE ALL OK I HAVED BEEN TOLD THAT I CAN BE THE HARMONIC BALANCER BUT NO SURE . ANY HELP WELCOME !!!!!
 

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Posted by 5.7L EATER (Member # 9451) on :
 
check ur timing
 

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Posted by Rigo5.0 (Member # 5247) on :
 
Could be timing is off, or just as you mentioned- harmonic balancer. I had a very similar problem and it turned up to be a bad balancer. Check to see if the rubber piece in between the balancer is coming apart.
 

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Posted by P.B.R .stangs (Member # 6544) on :
 
if it feels like a bad miss check the timing, if the timing is good and there are no vac leaks and its still missing you might of bent some valves if you put a cam in a stock 86 flat top piston motor. hope thats not the case goodluck.
 

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Posted by 86 T TOPS (Member # 8855) on :
 
WELL I HOPE ITS NONE OF MY VALVES CUS I JUST RECENTLY SWAPED TO GT4O'S AND I DOUBT ITS THE TIMING BECAUSE WHEN I ACCELERATE SOUNDS FINE AND WHEN ITS THE TIMING IT USUALLY MISS FIRES . MY GUESS
 

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Posted by 86 T TOPS (Member # 8855) on :
 
I FORGOT ITS AN 89 MOTOR NO FLAT TOPS !!
 

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Posted by MikeD. (Member # 8060) on :
 
Yeah see if your harmonic balancer is going crazy.
 

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Posted by JohnB (Member # 969) on :
 
Balancer or timing is completely wrong. Had a car a few weeks ago that was 10* the opposite way...it ran a "little bit" rough.
 

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Posted by 89Rodknocker (Member # 2951) on :
 

quote:

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Originally posted by JohnB:
Balancer or timing is completely wrong. Had a car a few weeks ago that was 10* the opposite way...it ran a "little bit" rough.

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