Hello and thanks in advance for anyones help. I took my 94 GT convertable 5.0 automatic in for a tune up and since then I've got a very bad vibration problem. The problem is worse when at idle but is still present on the road although not as bad. Yea the tune up guy said it wasn't anything they did and tried to play it off as must be something else. I know they replaced the plugs and wires. I've since replaced the plugs myself (while checking for a broken one). I noticed the plugs he used were low end autolite. But the problem remains and I'm not sure what to do next. Could it be the new wires? The vibrations seems to shakes the whole car. I'm hoping someone else has ran into this before. It doesn't feel like a skip (just constant vibration) and it doesn't backfired. Could use some help....Tks, reb
Last edited by rebnsc; 02-06-2007 at 04:56 PM.
Reason: add info
Hello and thanks in advance for anyones help. I took my 94 GT convertable 5.0 automatic in for a tune up and since then I've got a very bad vibration problem. The problem is worse when at idle but is still present on the road although not as bad. Yea the tune up guy said it wasn't anything they did and tried to play it off as must be something else. I know they replaced the plugs and wires. I've since replaced the plugs myself (while checking for a broken one). I noticed the plugs he used were low end autolite. But the problem remains and I'm not sure what to do next. Could it be the new wires? The vibrations seems to shakes the whole car. I'm hoping someone else has ran into this before. It doesn't feel like a skip (just constant vibration) and it doesn't backfired. Could use some help....Tks, reb
could be anything from loose vacuum connection to bad motor/transmission mounts.
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Woe to him who builds his palace by unrighteousness,his upper rooms by injustice,making his countrymen work for nothing...Does it make you a king to have more and more cedar?Did not your father have food and drink?He did what was right and just,so all went well with him. He defended the cause of the poor and needy,and so all went well...But your eyes and your heart are set only on dishonest gain,on shedding innocent blood and on oppression and extortion. Jer 22:13, 15-17
If it only happened after they tuned it up, I'd say it's something they did, prolly a defective wire. Might be the cap or rotor.
Verify 13726548 for your firing order. #1 is labeled on the cap, and the rotor spins counterclockwise. The cylinders are numbered like:
Rear
48
37
26
15
Front
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1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads!
a common problem with sn95 5.0L are there harmonic balancers. i see it all the time and as described as you put it. i'm 75% sure its your balancer just by what you told me. check to see if it is the balancer is whobbling at idle or see if there might be rubber popping out of the balancer with the engine off.
could be anything from loose vacuum connection to bad motor/transmission mounts.
Yep, check for a disconnected vacuum line, as well.
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1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads!
a common problem with sn95 5.0L are there harmonic balancers. i see it all the time and as described as you put it. i'm 75% sure its your balancer just by what you told me. check to see if it is the balancer is whobbling at idle or see if there might be rubber popping out of the balancer with the engine off.
+1! I changed out my balancer a few weeks ago. Out of no-where, the car just started vibrating, and it got worse in the 2 days it took me to find the problem.
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Dave
'07 Redire GT
5 Sp Manual, Flowmasters, Pypes H-Pipe w/ Pypes Hi-Flow Cats, C&L CAI, X-Cal2 (BamaChips), Hurst Competition Plus Short Shifter, FRPP 4.10's
'94 GT Vert
Steeda Strut Tower Brace, Steeda Sub-Frame Connectors, FRPP Flywheel, King Cobra Clutch, Flowmasters, MAC O/R H-Pipe
wow -- your problem sounds the exact same as one that I started having about two months ago (I've just let the car sit there until this weekend). I'm replacing my harmonic balancer, right now as I write this (taking a break).
Once I got the crankshaft pulley off, I noticed the rubber popping out of the back of the dampener! I guess I've found the problem. Now, all I have to do is get that damn crankshaft bolt out and use the pulley remover to get the balancer off.
So, yeah -- I'd say it was your dampener!
By the way, O Wise Sages of this Forum -- is there anything I should be remembering to do at this point? (Some part I have to transfer from the old balancer to the new one, perhaps?)
Now, all I have to do is get that damn crankshaft bolt out
I think it has a reverse thread.
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1992 Deep Emerald Green Mustang GT Hatch, 5 speed, 2.73s, Mac fenderwell cold air intake, '93 Cobra MAF, Mac 70mm throttle body & spacer, Explorer intakes, Mac unequal headers & offroad pipe, Magnaflow catback, Walbro 110lph fuel pump, Jet adjustable FPR, MSD Blaster coil, Accel 8mm wires, FRPP aluminum quadrant, UPR firewall adjuster, stock cable, Granatelli upper control arms.
Waiting to go on: Granatelli lower control arms, and GT40 Iron heads!
well, it beats the hell outta me, but I got it out. Damn thing kept turning all by itself -- couldn't get any torque on it. So, I just stuck it the tranny in 5th (I had it in neutral, d'oh) and it eventually broke free.
well, it beats the hell outta me, but I got it out. Damn thing kept turning all by itself -- couldn't get any torque on it. So, I just stuck it the tranny in 5th (I had it in neutral, d'oh) and it eventually broke free.
Lol, yea that is one thing you HAVE to do is have it in gear or it'll just spin.
1994 GT Convert BAD Vibration setting still 
