Vibration In floorboard and gas pedal

[j-tayl76]

Has anybody had vibration in floorboard and in pedal, it seems to get worse with higher rpm, like at 50 mph take tranny out of O/D it gets worse? :bounce:

[Petrograde]

no vibrations here,.... hmmm that almost sounds like a bad transmission mount. But, I'm not an expert.

If it were an Army helicopter I could have it smooth as glass in 4 flights. :up:

Tom

[EbonyMarauder03]

What if you are cruising at a lower speed, say 25 and take it out of 3rd and go to 2nd? Same vibration?

A loose transmision mount generally gives you a banging vibration/sound on shifts versus a steady vibration. First thing I would check is the fluid level in the transmission and the color of the fluid on the dipstick.

[Petrograde]

A loose transmision mount generally gives you a banging vibration/sound on shifts versus a steady vibration.

True,.. it'll bang once the rubber has completely separated from the mount. But it has been my experience that a bad transmission mount (or engine mounts, for that matter) start out as a vibration.

I replaced 4 transmission mounts in my '87 Trans Am. The real culprit was a bad engine mount, it seemed easier (when I was 18) to just change the transmission mounts! :rolleyes:

Checking the fluid level and condition is a good idea.

Tom

[j-tayl76]

:uzi:
I just found that it will do it while sitting in park 2000-2500 rpm and higher
feel vibraton in the whole vehicle
:help:

[CRUZTAKER]

Perhaps have someone else rev in neutral while you inspect in, around, and under the engine compartment since you just ruled out the driveshaft on back.:confused:

[EbonyMarauder03]

Does the engine sound smooth running? Does it sound like all cylinders are working? I would suggest unhooking one spark plug wire at a time to see which one causes no change but those days are gone. I would suggest looking to see if all injector plugs are connected tightly, check any sensors to make sure they are connected tightly. Obviously you've also checked your engine oil for anything strange. It still could be the torque convertor since it will be spinning with the engine.

[Marauderjack]

Maybe it's the same thing "junehhan" has written about in another thread??? :confused:

Ford techs have said it is tough to track down misses with coils on plugs.....Used to be new wires fixed things like this!! :(

Maybe the computer diagnostics will show something if you can get it to do it at the dealer?? :nono: Sometimes mine shakes a little at idle and most times not...beats me!! :( Runs good and strong though!! :up: Idles at about 750 RPM's in gear with "Dr. Reinhart's" program...used to idle at 600 or so??

Marauderjack :D

[MIKE B]

:uzi:
I just found that it will do it while sitting in park 2000-2500 rpm and higher
feel vibraton in the whole vehicle
:help:I have exactly the same vibration in mine. There is a thread titled VIBRATION you can look at for some backround. To make a long story short, my dealer eliminated the flexplate as the problem by changing it out, and eliminated the torque converter by removing it, and running the engine with the transmission out of the car. The vibration still existed, and at the same RPM you are talking about (2000-2200). After the area tech checked it out with some kind of vibration equipment they decided it was in the engine. Last Friday my new off the assembly line engine was installed. The car is a 2003, and now has a 2004 engine in it complete with silver valve covers. The vibration is still there! So now the dealer does not know what to do. It is obviously picking up some kind of harmonics and transmitting it through the car, but we are again at a standstill. This dealer has been great, but unable to find the problem so far. My car has been at the dealer for 35 days now. The service manager is supposed to call me again today, I'll let you know the next move. Good luck!

[CRUZTAKER]

...The car is a 2003, and now has a 2004 engine in it complete with silver valve covers..... I think I feel a vibration.....yeah....vibratio n....that's the ticket!:nono:

Still, that's a great mod, too bad they didn't give you the '04 trans as well.
I'll be interested to find out what the deal is on this one. Were the motor mounts replaced when the engine swap occured?

[MIKE B]

I think I feel a vibration.....yeah....vibratio n....that's the ticket!:nono:

Still, that's a great mod, too bad they didn't give you the '04 trans as well.
I'll be interested to find out what the deal is on this one. Were the motor mounts replaced when the engine swap occured?Yes the motor mounts were replaced. As far as this being a great mod goes, what's the difference? This one has silver valve covers, and dual knock sensors, but they can only hook up one of the knock sensors. My original engine ran perfectly, and I would have rather kept that one. This car has just over 15,000 miles on it.

[TripleTransAm]

The car is a 2003, and now has a 2004 engine in it complete with silver valve covers. The vibration is still there!

Neat!

Did you have to change out the PCM for an '04 too? Did you swap out the harness?

The reason I ask is three-fold:
1. I'm interested in whether the '04 PCM works with the old transmission (4R70W instead of 4R75W).
2. to benefit from the 2nd knock sensor of the '04, you need the '04 wiring and '04 PCM.
3. in the case of your problem, couldn't vibrations cause intermittent breaks or shorts in the harness that would cut off a cylinder now and again? This would show up with a new engine using the old harness and/or PCM, since it too would be subject to the same electrical malady.

Not too many possible areas of failure there... power comes from the battery and/or alternator via wiring, ignition is triggered by PCM via wiring, fuel pressure is delivered as metered via wiring...

[CRUZTAKER]

^^^That's right^^^, I forgot about the old wire harness chaffing issue. Causes some pretty wierd symtoms. Many of us had this happen, or atleast nearly happen.

If you haven't read that thread, look at where the main harness leaves the left side rear valve cover area and enters the cabin. There is a piece of metel with a sharp edge really close to that harness, and in most cases, touching.

[Marauderjack]

Hey Barry...

I looked at mine and there is a guard behind the passenger's side valve cover protecting the harness?? Nothing on the driver's side behind the valve cover!!

When you say left side is that facing the engine...passenger's side??

Marauderjack :cool4:

[CRUZTAKER]

The harness I speak of is on the drivers side.

edit: I found the thread with pics.

HERE! (http://www.mercurymarauder.net/forums/showthread.php?t=54&highlight=wiring+harness)

http://www.mercurymarauder.net/forums/attachment.php?attachmentid=10

[jgc61sr2002]

MikeB - Does your Marauder qualify for the Lemon Law. You may have a case and have the FMC buy back or replace your vehicle. :(

[MIKE B]

MikeB - Does your Marauder qualify for the Lemon Law. You may have a case and have the FMC buy back or replace your vehicle. :(
Since the dealer has had the vehicle for over 30 days, I believe it does qualify for the lemon law, and I have discussed this with the service manager. I do believe however that they are really trying to fix the problem, and also believe it is something very minor after replacing the engine, and eliminating the flexplate, torque converter, and transmission as being a problem. I am more inclined to give them more time to see what they come up with. As I said they are really trying, and have not tried to jerk me around at all. I'm leaving for Daytona at the end of this week for bikeweek, and other riding for 3 weeks so that should give them the time they need. We'll see. Thanks for asking.

[merc406]

I have exactly the same vibration in mine. There is a thread titled VIBRATION you can look at for some backround. To make a long story short, my dealer eliminated the flexplate as the problem by changing it out, and eliminated the torque converter by removing it, and running the engine with the transmission out of the car. The vibration still existed, and at the same RPM you are talking about (2000-2200). After the area tech checked it out with some kind of vibration equipment they decided it was in the engine. Last Friday my new off the assembly line engine was installed. The car is a 2003, and now has a 2004 engine in it complete with silver valve covers. The vibration is still there! So now the dealer does not know what to do. It is obviously picking up some kind of harmonics and transmitting it through the car, but we are again at a standstill. This dealer has been great, but unable to find the problem so far. My car has been at the dealer for 35 days now. The service manager is supposed to call me again today, I'll let you know the next move. Good luck!


I think I recall posting-- Look for a cut wire or something.
I hope they get you going soon Mike.

[Thomas C Potter]

Now my 2c worth. Possible exhaust induced vibration. My Blue 03 MM has some STRONG vibration felt in shifter and gas pedal when cold, like 15 degrees. This goes away once slighlty warmed-up. Years back, Dodge Omnis had such vibrations, Chrysler installed different style pipe between engine and cat conv. I dimpled my sister's Omni's pipe, problem gone.

Good luck.. TP

[junehhan]

I also have the same vibration you are feeling in my car as well, although it's a little subtle. When i'm accelerating, I feel a buzzing type feeling in the gas pedal that buzzes higher as the engine rpms get higher as well. This is just a buzzing feeling, not a sound..........

I do feel it faintly in the floorboard as well, and just thought that it was normal since my 01 Cobra also did the same thing as well. When my transmission downshifts, I can hear a faint thud coming from somewhere under and in front of my car, but I never paid attention to it because my old 00 Crown Vic also made a slight thud when downshifting...............