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Author
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Topic: 93 virbations over 2,000rpm, neutral and in gear
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30Tunes
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Member # 8105
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posted
 
 
My 93 is giving me vibrations when revving over 2,000 rpms. It happens in both neutral and in gear. What could be the cause of this? It happened out of no where. I was leaning towards the driveshaft bolts but it should be ruled out when it happens in neutral, correct?
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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LXjames
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Member # 10791
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posted
How's your harmonic balancer
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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30Tunes
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Member # 8105
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posted
I'll check that tomorrow. Should a replacement fix the problem or would that cause internal problems too?
[ 2013-12-10, 08:21 PM: Message edited by: 3-0-Tunes ]
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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2BlueGeeTees
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Member # 4702
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This could be a few things. Balancer is a good place too start. Check for rubber protruding out. Could be main cap walk, worn bearings and journals. Is your motor modified or high mileage?
Posts: 2316 | From: Vacaville | Registered: Jul 2004
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30Tunes
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Member # 8105
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posted
quote:
Originally posted by 2BlueGeeTees:
This could be a few things. Balancer is a good place too start. Check for rubber protruding out. Could be main cap walk, worn bearings and journals. Is your motor modified or high mileage?
I just did a water pump replacement and I also changed the timing cover. I used a harmonic balancer puller tool and replaced the main seal along with a bunch of other things. Motor is modified and also high milage (100k)
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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30Tunes
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Member # 8105
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posted
balancer was fine. Changed the motor mounts and its alot better but now the vibration is coming from the tranny area. I got a new poly mount for it so I figured I might as well swap that out and I'm pretty sure the problem will be solved. Any tips on changing the tranny mount??
EDIT- I noticed even after just changing the motor mounts that the engine is still sagging to the passenger side. So bad that the cold air intake tube off the manifold is hitting against where the camber plates are bolted to. I looked at the tranny mount and sure enough it is leaning the same way. Would this cause the symptoms that I'm having?
[ 2013-12-12, 04:03 PM: Message edited by: 3-0-Tunes ]
Posts: 829 | From: Bay Area | Registered: Dec 2007
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30Tunes
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Member # 8105
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posted
Anyone?? (read above)
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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Just_a_GT
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Member # 10372
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posted
I have the same problem. Vibration at the transmission. My car is took apart so I have not been able to diognose the problem or try to fix it. Once I get my car running again I'm going to replace my driveshaft with one of my friends and see if that is the problem.
Here's a thread I started about it, some good advice on things to check .
http://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=028474
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1990 GT 308 edelbrock alum heads Daily driver
2000 GT CAMMED 281ci
Posts: 697 | From: Winton, CA | Registered: Oct 2010
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30Tunes
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Member # 8105
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posted
I appreciate your feedback but your symptoms are different. I experience the vibrations in neutral and in gear so that would rule out anything from the rearend / driveshaft
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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Egocentric
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Member # 9529
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posted
Anything in neutral, and in gear basically rules out a few differen't things. Like driveshaft, rear end, trans mount.
Flywheel, clutch assembly is where I'd personally start.
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08 G37S
72 C10 Custom
R6
quote:
ain't no one tell me what to do. - NEIGHT
Posts: 1712 | From: NoOneTellMeWhatToDo-Neight | Registered: Oct 2009
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30Tunes
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Member # 8105
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posted
My friend says he thinks my harmonic balancer is the cause of the vibrations.
I took some pictures of it , I'm not too sure what to be looking for but I don't see any rubber pieces on it in general. Let me know if this looks like it could be the problem
Posts: 829 | From: Bay Area | Registered: Dec 2007
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LXjames
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Member # 10791
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posted
There's a rubber seal peaking out in the second pic of you zoom towards the are between the pulley and balancer. Id think that could be your issue
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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30Tunes
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Member # 8105
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I see the rubber ur talking about I didn't really know where to look. About how sure are you this will fix the problem? A buddy said one cylinder might not be firing but I got good power and it doesn't feel like a missfire to me
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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30Tunes
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Member # 8105
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posted
[ 2013-12-14, 05:39 PM: Message edited by: 3-0-Tunes ]
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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LXjames
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Member # 10791
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posted
I'm about 75% sure but it's a harmonic balancer...how bad of an idea is it to replace it not only to rule it out but also to replace what seems to be an old part
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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30Tunes
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Member # 8105
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posted
Thanks, ill change it out tomorrow. I hope that's all it is.
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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2BlueGeeTees
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Member # 4702
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posted
It's not the best angle but the rubber is certainly peaking out. If this isn't the immediate cause of the vibration you feel now it is sure to be the cause of a much worse vibration soon time soon
Posts: 2316 | From: Vacaville | Registered: Jul 2004
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30Tunes
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Member # 8105
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posted
Now that its pointed out I think this is the cause I just went and got a new one. Ill fix tomorrow and leave updates. If this is ruled out, what else could it be?!
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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30Tunes
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Member # 8105
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posted
Changing out today! I had another question. After changing my motor mounts I noticed the engine leans to the passenger side. It's noticeable so I'm assuming this can't be right. What could cause this? The mounts are brand new
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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LXjames
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Member # 10791
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posted
Well the leaning could be multiple things. I think mine leaned to one sad because they where on the wrong sides. Did you check that?
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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30Tunes
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Member # 8105
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posted
I thought they could only go in one way. I just changed the harmonic and she's smoother than ever! I'm gunna check my timing cause I'm sure its off. Thanks everyone!
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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Tom Renzo
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Member # 13165
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posted
Ford dampers are
one of the most failed part in those engines. Whenever you have a dough if yours is spun out do a TRUE TDC check and that will tell you in 30 seconds it spun. But anytime the vibration comes out of know where the damper spun on a ford
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I spend money i don't have. Building cars i don't need. To impress people i don't know.
Posts: 557 | From: CT | Registered: Sep 2013
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LXjames
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Member # 10791
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posted
Good to hear we helped you out. If the motor still leans swap your mounts side to side or maybe the locating tab isn't all the way in or it's hung up somewhere
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On Point Motorsport prez.
King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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30Tunes
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Member # 8105
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posted
Man I can't thank this site and the people on it enough. Thanks alot! I'll see what I can do with the mounts and see if it fixes the problem. if the mounts are ruled out, what else could cause this?!
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SUCCESS ONLY COMES BEFORE WORK IN THE DICTIONARY
1991 Calypso Green Notch
1993 Cobra Clone - SOLD
Posts: 829 | From: Bay Area | Registered: Dec 2007
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