Vibration at idle

English_Mike · 05-28-2008, 09:24 AM

I have a '88 5.0 that has an annoying 'vibration' at idle which can be felt through the bodywork. I have replaced plugs, leads, dizzy cap, rotor arm, starter coil, all to no avail. I do also think that the motor lacks power - not dramatically, but noticeable to me.

I am stuck for clues here in England and I will get conned by our mechanics over here!

Any help greatly appreciated!

pearce9906 · 06-21-2008, 01:16 AM

check out to damper pulley (harmonic balancer), they tend to spin apart or start seperating. This puts one helluva vibration in the car. Check it out and make sure it looks normal. Good luck, let us know how it turns out.

goodyear1984 · 06-30-2008, 06:26 PM

does the engine rum like crap? does the vibration get worse when u rev it up>?

English_Mike · 07-01-2008, 12:19 AM

Quote:

Originally Posted by goodyear1984

does the engine rum like crap? does the vibration get worse when u rev it up>?

The vibration doesn't get worse above idle, but I have noticed a reduction in power and a mis-fire when pulling hard through the gears during gear changes.
I will check the harmonic balancer as our previous friends advice (when I can find out where it is! No workshop manuals here worth a damn!!).
The motor always fires up first turn.

pearce9906 · 07-01-2008, 12:29 AM

The harmonic balancer is the big pulley on the front of the crankshaft. Do you think the vibration is coming from the motor (i.e. the front of the car) or could it be coming from the rear or midsection of the car, I've known of the exhaust laying against the unibody chassis and vibrating the crap out of it during idle.

English_Mike · 07-02-2008, 03:19 AM

Thanks for the advice my friend.

The vibration is most definately from the front end, so checking the harmonic balancer will be my first port of call at the weekend!

English_Mike · 07-14-2008, 03:02 AM

Quote:

Originally Posted by pearce9906

The harmonic balancer is the big pulley on the front of the crankshaft. Do you think the vibration is coming from the motor (i.e. the front of the car) or could it be coming from the rear or midsection of the car, I've known of the exhaust laying against the unibody chassis and vibrating the crap out of it during idle.

I have checked the harmonic balancer and all looks fine.

However, I have found a earthing strap hanging from the firewall which has a washered end on it which looks like it should be attached to something like the bell housing!
I did have a new clutch fitted and wonder if the guys forgot to re-attach it.
Could this be the problem?
Where should it attach?

05-28-2008, 09:24 AM	#1
English_Mike Registered Member Join Date: May 2008 Posts: 4	Vibration at idle I have a '88 5.0 that has an annoying 'vibration' at idle which can be felt through the bodywork. I have replaced plugs, leads, dizzy cap, rotor arm, starter coil, all to no avail. I do also think that the motor lacks power - not dramatically, but noticeable to me. I am stuck for clues here in England and I will get conned by our mechanics over here! Any help greatly appreciated! Last edited by English_Mike; 05-28-2008 at 05:22 PM..

06-21-2008, 01:16 AM	#2
pearce9906 Registered Member Join Date: Nov 2007 Location: OHIO Posts: 20	Re: Vibration at idle check out to damper pulley (harmonic balancer), they tend to spin apart or start seperating. This puts one helluva vibration in the car. Check it out and make sure it looks normal. Good luck, let us know how it turns out.

06-30-2008, 06:26 PM	#3
goodyear1984 Registered Member Join Date: Dec 2006 Location: new york Posts: 482	Re: Vibration at idle does the engine rum like crap? does the vibration get worse when u rev it up>? __________________ 347 stroker all forged,arp everything,stud mains w/girdle,7qt pan,full roller, custom cam, aluminum heads swirl valves 5 angle valve job.quick fuel 750,areomotive pump,cobras w/nitto drags,and m/t et drags for the track, ford racing 373 gears,centerforce clutch,tko500,underdrive pulleys,bassani x-pipe,flowmasters ^best et so far 11.6 1.61 60ft coming soon 9sec et's 1992 mustang gt 2001 gmc 1500 4x4 78 century boat 92 skidoo

07-01-2008, 12:29 AM	#5
pearce9906 Registered Member Join Date: Nov 2007 Location: OHIO Posts: 20	Re: Vibration at idle The harmonic balancer is the big pulley on the front of the crankshaft. Do you think the vibration is coming from the motor (i.e. the front of the car) or could it be coming from the rear or midsection of the car, I've known of the exhaust laying against the unibody chassis and vibrating the crap out of it during idle.

07-02-2008, 03:19 AM	#6
English_Mike Registered Member Join Date: May 2008 Posts: 4	Re: Vibration at idle Thanks for the advice my friend. The vibration is most definately from the front end, so checking the harmonic balancer will be my first port of call at the weekend!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
vibration at 3k	mark sweetser	Modular Madness	6	04-21-2006 10:52 AM
Vibration Need Help	Walt92Conv	Windsor Power	9	07-05-2002 06:39 AM
Weird idle problems Idle’s fine but running ruff	Tony91LX	Windsor Power	0	10-08-2001 07:06 AM
Vibration gone!!!	joe4speed	Windsor Power	9	05-24-2001 10:11 AM
Vibration from the 2.73	Bandit11	Windsor Power	1	02-28-2001 01:47 PM