1994 Mustang Convertable

CM31 · 05-04-2004, 03:07 PM

THE ENGINE OF MY AUTO MUSTANG CONVERTABLE VIBRATES VERY BADLY. SO BADLY THE ENGINE IS TRYING TO JUMP OUT OF THE CAR. ALL ENGINE COMPONENTS HAVE BEEN CHECKED AND MOTOR IS FIRING ON ALL CYLINDERS. PLEASE HELP IT,S MY DAILY RIDE.

crazypete · 05-04-2004, 03:42 PM

I almost guarantee that it is the harmonic balancer! It will make the car shake like hell. Sometimes it wont visibly shake but could be slightly bent. If it vibrates in neutral and only related to engine rpms, it's the balancer.

Or.....

I once had my plug wires re-arranged by an enthusiastic but unknowledgeable mechanic and he had changed the wires to some old 70's ford firing order. The car actually ran, but it shook and ran like @ss .

HISSIN50 · 05-05-2004, 03:50 AM

im with CP on that one. the balancer is on the crank. we are both assuming this occurs while idling (not moving). take a look at it. there is an elastomer (rubber O-ring) in the middle that locates the two halves. if the rubber looks cracked at ALL, or you look at the thing and it is wobbling, get a new one. or if you time the car, and the timing marks are a ways off, that suggests that it has slipped.
please dont drive your car like that. the balancer quenches torsional vibrations - the bottom end does not like to be run with one out of phase.

a lot of folks are very happy with Romacs (SFI), but they are pricey. if you dont rev real high often, something like a Pioneer non SFI should be sufficient. also, LRS sells a PP non SFI unit good for 6.5K (rpm) for 80 bucks, and it is reportedly a good piece.

good luck.

CM31 · 05-05-2004, 11:30 AM

many thanks guys I will get balancer parts a.s.a.p as I am in england it may take a while will get back to you .

CM31 · 06-26-2004, 10:22 AM

Many Many thanks guys it was the harmonic balancer!
If you ever want any help from England do not hesitate
CM13.

HISSIN50 · 06-26-2004, 11:46 AM

glad to hear you got it whipped. nice work!

05-04-2004, 03:07 PM	#1
CM31 Registered Member Join Date: May 2004 Location: ENGLAND Posts: 4	1994 Mustang Convertable THE ENGINE OF MY AUTO MUSTANG CONVERTABLE VIBRATES VERY BADLY. SO BADLY THE ENGINE IS TRYING TO JUMP OUT OF THE CAR. ALL ENGINE COMPONENTS HAVE BEEN CHECKED AND MOTOR IS FIRING ON ALL CYLINDERS. PLEASE HELP IT,S MY DAILY RIDE. __________________ C12MUL Last edited by CM31; 05-04-2004 at 03:28 PM..

05-04-2004, 03:42 PM	#2
crazypete Registered Member Join Date: Sep 2002 Location: Boston Posts: 592	I almost guarantee that it is the harmonic balancer! It will make the car shake like hell. Sometimes it wont visibly shake but could be slightly bent. If it vibrates in neutral and only related to engine rpms, it's the balancer. Or..... I once had my plug wires re-arranged by an enthusiastic but unknowledgeable mechanic and he had changed the wires to some old 70's ford firing order. The car actually ran, but it shook and ran like @ss . __________________ 91 GT Carb conversion, holley 600 double pumper, edelbrock performer intake, FMS "C" drop springs, march 1000 underdrive pullies, crane 1.7 roller rockers, GT-40P headers, bassani x pipe, american thunder catback, FMS 4.56's, msd aL6, trunkmount battery, A/C eliminator kit, 3000 stall tci streetfighter, AOD with transgo kit, A+ servo, 300M hardened lockup shaft, kevlar bands and 28,000 gvw trans cooler, 3 core radiator, 300 lbs stripped with a full interior

05-05-2004, 11:30 AM	#4
CM31 Registered Member Join Date: May 2004 Location: ENGLAND Posts: 4	1994 mustang many thanks guys I will get balancer parts a.s.a.p as I am in england it may take a while will get back to you . __________________ C12MUL

06-26-2004, 10:22 AM	#5
CM31 Registered Member Join Date: May 2004 Location: ENGLAND Posts: 4	1994 mustang Many Many thanks guys it was the harmonic balancer! If you ever want any help from England do not hesitate CM13. __________________ C12MUL

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05-05-2004, 03:50 AM	#3
HISSIN50 Registered Member Join Date: Mar 2004 Posts: 62	im with CP on that one. the balancer is on the crank. we are both assuming this occurs while idling (not moving). take a look at it. there is an elastomer (rubber O-ring) in the middle that locates the two halves. if the rubber looks cracked at ALL, or you look at the thing and it is wobbling, get a new one. or if you time the car, and the timing marks are a ways off, that suggests that it has slipped. please dont drive your car like that. the balancer quenches torsional vibrations - the bottom end does not like to be run with one out of phase. a lot of folks are very happy with Romacs (SFI), but they are pricey. if you dont rev real high often, something like a Pioneer non SFI should be sufficient. also, LRS sells a PP non SFI unit good for 6.5K (rpm) for 80 bucks, and it is reportedly a good piece. good luck.

06-26-2004, 11:46 AM	#6
HISSIN50 Registered Member Join Date: Mar 2004 Posts: 62	glad to hear you got it whipped. nice work!