5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

can harmonic balancer cause rough idle?? revving??

Thread Tools
 
Search this Thread
 
Old 06-26-2008, 03:10 PM
  #1  
stackz
Thread Starter
 
stackz's Avatar
 
Join Date: Jun 2008
Posts: 10
Default can harmonic balancer cause rough idle?? revving??

I've done a compression test with good results and ran all codes and only get a few emissions codes and the car runs really rough at idle but makes stable vacuum and also revs up sorta bad (sounds like hesitation but still revs freely).

anyway, I've had a HELL of a time trying to time the engine as the balancer marks were way off. I assumed the outer ring had possibly slipped and confirmed it today when I took everything off to get to the balancer and when I put my HANDS on the outer ring it came off the center ring...by hand...1/2" lol. I believe that's a telltale sign right there. anyway, I just about broke my left middle finger trying to get the balancer off without a puller [:'(]so I'm done for the day trying that until I go pick up a puller tomorrow.

anyway, when trying to time the engine, the marks were almost 120* degrees off from where they were supposed to be. Would the outer ring being off by this much cause the car to run so badly?? considering how they are balanced it honestly makes me think this is highly possible but I just wanna make sure.
stackz is offline  
Old 06-26-2008, 03:14 PM
  #2  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default RE: can harmonic balancer cause rough idle?? revving??

being off it would cause a vibration..replace it and retest it and why in the heck would you ever try and think you can pull the balancer off by hand??no if ands or buts always need a puller!! good luck and ice that hand!!
mjr46 is offline  
Old 06-26-2008, 03:16 PM
  #3  
stackz
Thread Starter
 
stackz's Avatar
 
Join Date: Jun 2008
Posts: 10
Default RE: can harmonic balancer cause rough idle?? revving??

lol, you wouldnt imagine the luck I've had with balancers and being able to just grab them and slip them off the snout until...this time

stackz is offline  
Old 06-26-2008, 03:18 PM
  #4  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default RE: can harmonic balancer cause rough idle?? revving??

^^^^^I've never been able to do that on a ford 302
mjr46 is offline  
Old 06-26-2008, 05:04 PM
  #5  
camaroeater
4th Gear Member
 
camaroeater's Avatar
 
Join Date: Oct 2007
Location: Phoenix, AZ
Posts: 1,219
Default RE: can harmonic balancer cause rough idle?? revving??

ORIGINAL: mjr46

being off it would cause a vibration..replace it and retest it and why in the heck would you ever try and think you can pull the balancer off by hand??no if ands or buts always need a puller!! good luck and ice that hand!!
Just did mine yesterday and I didn't plan on it slipping off, but with ratchet on the puller it was off in minutes. When mine went bad the timing was not reading correctly, but was not wobbling. A couple days later I noticed mycar was shaking at idle, i popped the hood and the balancer was wobbling around causing the engine to shake.
camaroeater is offline  
Old 06-26-2008, 06:48 PM
  #6  
stackz
Thread Starter
 
stackz's Avatar
 
Join Date: Jun 2008
Posts: 10
Default RE: can harmonic balancer cause rough idle?? revving??

I couldnt stand it, had to go buy a new balancer and puller setup. I got the old one off and compared it to the new one and it was off by at LEAST 120 degrees. tossed the new one on and as soon as I cranked the engine up it was glass smooth and took me about 10 seconds to correctly set the timing at 10 btc.

car runs SOOO good now, couldnt be happier lol. I thought it was the balancer all along but it wasnt until I pulled on it today and it did what it did, that proved it to me
stackz is offline  
Old 06-26-2008, 06:50 PM
  #7  
mjr46
D.R. THE PATHETIC DORK
 
mjr46's Avatar
 
Join Date: Jun 2007
Location: West Virginia
Posts: 30,863
Default RE: can harmonic balancer cause rough idle?? revving??

good job!! glad to hear it's fixed
mjr46 is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
GimpyHSHS
4.6L (1996-2004 Modular) Mustang
19
12-19-2023 01:12 PM
4cylinderplus2
V6 (1994-2004) Mustangs
10
10-09-2020 07:45 PM
TCStangerv6
Street/Strip
12
10-11-2015 05:57 PM
svfetter
5.0L (1979-1995) Mustang
9
10-05-2015 11:39 AM
MacSerio
5.0L (1979-1995) Mustang
3
09-27-2015 01:05 PM



Quick Reply: can harmonic balancer cause rough idle?? revving??



All times are GMT -5. The time now is 05:19 PM.