Vibration When Stopping

Mach Boy · January 8th, 2012, 10:20 PM

I've been having a vibration in the car when I'm coming to a stop. It does not occur (at least that I can feel) when the car is accelerating or cruising. It can only be felt below ~10mph and stops when the car has stopped. Any ideas?

Around the same time this happened (within a month) the ABS module and the wiring harness connection to it caught fire/melted and I had to disconnect it. I don't know if it can be related I'm just mentioning it as a side note.

03Black2v · January 8th, 2012, 10:25 PM

I have no idea. But I have a question, did you race a LS1 dodge ram? lol

Mach Boy · January 8th, 2012, 10:27 PM

Maybe...

03Black2v · January 8th, 2012, 11:08 PM

Knew I recognized the car lol.

Mach Boy · January 8th, 2012, 11:10 PM

This shaking shakes the whole car. It's not a small vibration. I can even feel it in the shifter while I'm holding it.

dhicks7806 · January 8th, 2012, 11:13 PM

Does it happen when you hit the brakes at higher speeds or ONLY under 10 mph? And does the brake pedal dive towards the floor a couple inches and then act like its having a seizure?

Sent from my Autoguide iPhone app

Cabikejumper · January 8th, 2012, 11:30 PM

Rotors?

86er · January 8th, 2012, 11:50 PM

It wont be abs related if its disconnected, its prob warped rotors. When you first drive the car and the brakes are cold does it do it? Or is it after a little bit of driving and the brakes have gotten some heat in them

Mustang_Girl_32 · January 8th, 2012, 11:51 PM

I had shaking when I stopped and had to replace brake lines and rotors.

Mach Boy · January 9th, 2012, 01:03 AM

The brakes don't even have to be applied for me to feel this. It's only under 10mph roughly, that's the only variable. Clutch, brakes, gear the transmission is in doesn't matter. I've been doing just local driving but now that I think about it it seems as though it happens after the car has heated up. I just replaced the rotors this summer which means they are still under warranty. It just sucks that I'll have to pull them to figure out which ones it is.

86er · January 9th, 2012, 01:26 AM

how many miles are on the car?

p4ndiamond · January 9th, 2012, 01:35 AM

Sounds power steering pump/load related. How is the PS fluid and the pump. is it free spinning without a belt on it ?

Mach Boy · January 9th, 2012, 02:12 AM

73000 on the car. Fluids are fine, but for some reason the car will die sometimes if I turn the wheel one way or the other all the way at a low speed.

Mach Boy · January 9th, 2012, 07:27 PM

Any other ideas guys? I'm planning on checking this stuff on Thursday when it gets a little warmer.

cliffyk · January 9th, 2012, 07:46 PM

As others have said--the brake rotors are warped. It is common on all older cars, I just replaced the fronts on my wife's 2003 Highlander a few weeks ago.

The stalling could be a failing IAC. With the engine hot and idling disconnect the IAC electrical connector, engine speed should drop or perhaps even stall--if is does not the IAC is dying/dead. There are resistance tests to confirm this, but first unplug it and see what happens...

86er · January 9th, 2012, 08:57 PM

From what he said earlier it doesnt sound like the rotors. The stalling is prob from the pressure switch in the p/s. Suppose to up the rpms when at full lock to compensate for the extra strain put on the engine when turned lock to lock

cliffyk · January 9th, 2012, 09:09 PM

That is a possibility, the p/s pressure sensor reports p/s load to the PCM so that it can tell the IAC to pass more air...

SSG Pate · January 9th, 2012, 09:11 PM

Have you checked your driveline for loose bolts or a u joint?

Mach Boy · January 9th, 2012, 09:48 PM

I didn't think that it would be the driveline since it doesn't get worse with higher speed. I just remembered that the night I moved from St. Louis to Indy my car developed a whine much like a bad belt or the tensioner going bad. It was completely random except for that the car had to be above 65 mph for it to occur. It only happened that one night and hasn't happened since. This makes me want to check the P/S first then the rotors. Mainly because everything else that everyone has mentioned has been replaced rather recently.

Thanks for the help guys.

Macunicorn · January 9th, 2012, 11:38 PM

Warped rotor in the front.

January 8th, 2012, 10:20 PM	#1
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	Vibration When Stopping I've been having a vibration in the car when I'm coming to a stop. It does not occur (at least that I can feel) when the car is accelerating or cruising. It can only be felt below ~10mph and stops when the car has stopped. Any ideas? Around the same time this happened (within a month) the ABS module and the wiring harness connection to it caught fire/melted and I had to disconnect it. I don't know if it can be related I'm just mentioning it as a side note. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 8th, 2012, 10:27 PM	#3
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	Maybe... __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 8th, 2012, 11:10 PM	#5
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	This shaking shakes the whole car. It's not a small vibration. I can even feel it in the shifter while I'm holding it. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 8th, 2012, 11:13 PM	#6
dhicks7806 Regular 2003 Mustang GT Join Date: Dec 2011 Location: Palmerton PA Posts: 252 iTrader: 0 reviews	Does it happen when you hit the brakes at higher speeds or ONLY under 10 mph? And does the brake pedal dive towards the floor a couple inches and then act like its having a seizure? Sent from my Autoguide iPhone app __________________ '03 GT w/BBK CAI, MAC Pro chamber, Borla Stingers, MGW Orange, SCT X3, and some make it sexy mods '89 GT 5.0 w/full bolt ons-SOLD '04 STi w/ A'pexi N1 catback and accessport-SOLD '00 Audi A6 2.7t stock - DD/Wifey's whip

January 8th, 2012, 11:50 PM	#8
86er I Post Entirely Way Too Much Join Date: Nov 2006 Location: Memphis, TN Posts: 7,626 iTrader: 0 reviews	It wont be abs related if its disconnected, its prob warped rotors. When you first drive the car and the brakes are cold does it do it? Or is it after a little bit of driving and the brakes have gotten some heat in them __________________ Just a truck 5.4 3v: 264hp 317ft lbs rock stock The "search" button, its not just for porn piecing together the next project faster than your first sexual experience

January 8th, 2012, 11:51 PM	#9
Mustang_Girl_32 Hardcore Enthusiast 2003 v6/2003 GT vert Join Date: Jun 2010 Location: Illinois Posts: 1,761 iTrader: 11 reviews	I had shaking when I stopped and had to replace brake lines and rotors. __________________ 2003 sonic blue v6- 18" gianna's, straight pipes, 12" DC level 5 with DC 3.5 K 2003 sonic blue GT vert- Bout to be a Procharged P1sc BEAST

January 9th, 2012, 01:03 AM	#10
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	The brakes don't even have to be applied for me to feel this. It's only under 10mph roughly, that's the only variable. Clutch, brakes, gear the transmission is in doesn't matter. I've been doing just local driving but now that I think about it it seems as though it happens after the car has heated up. I just replaced the rotors this summer which means they are still under warranty. It just sucks that I'll have to pull them to figure out which ones it is. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 9th, 2012, 01:26 AM	#11
86er I Post Entirely Way Too Much Join Date: Nov 2006 Location: Memphis, TN Posts: 7,626 iTrader: 0 reviews	how many miles are on the car? __________________ Just a truck 5.4 3v: 264hp 317ft lbs rock stock The "search" button, its not just for porn piecing together the next project faster than your first sexual experience

January 9th, 2012, 01:35 AM	#12
p4ndiamond Hardcore Enthusiast 1997 Pacific Green Cobra 14.80 No traction Join Date: May 2010 Location: New Orleans Posts: 1,219 iTrader: 0 reviews	Sounds power steering pump/load related. How is the PS fluid and the pump. is it free spinning without a belt on it ? __________________ GT ENGINE (temporary) 4.30 Gears , 31 spline Moser axles , Detroit tru Trac diff, Jmod 4r70w , Pi intake Hitech stage 2 cam, Vortech V2 3.33 pulley. Alum drive shaft. Lowering kit x2 ball joints ,screamin demon coils, LCA "

January 9th, 2012, 02:12 AM	#13
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	73000 on the car. Fluids are fine, but for some reason the car will die sometimes if I turn the wheel one way or the other all the way at a low speed. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 9th, 2012, 07:27 PM	#14
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	Any other ideas guys? I'm planning on checking this stuff on Thursday when it gets a little warmer. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 9th, 2012, 07:46 PM	#15
cliffyk Hardcore Enthusiast Join Date: Feb 2007 Location: Saint Augustine, FL Posts: 1,805 iTrader: 1 reviews	As others have said--the brake rotors are warped. It is common on all older cars, I just replaced the fronts on my wife's 2003 Highlander a few weeks ago. The stalling could be a failing IAC. With the engine hot and idling disconnect the IAC electrical connector, engine speed should drop or perhaps even stall--if is does not the IAC is dying/dead. There are resistance tests to confirm this, but first unplug it and see what happens... __________________ -cliff knight- My Mustang 2003 GT, UPR X, 24lb/h injectors, Magnaflow, 180° stat, PP 70mm TB & plenum, DF Commando, Steeda UDPs, Ralco RZ_flywheel, RAM HDX clutch, WX EFX COPs 3.73s, 262 rwHP/305 lb-ft. Flex-fuel: burns gas and rubber...

January 9th, 2012, 08:57 PM	#16
86er I Post Entirely Way Too Much Join Date: Nov 2006 Location: Memphis, TN Posts: 7,626 iTrader: 0 reviews	From what he said earlier it doesnt sound like the rotors. The stalling is prob from the pressure switch in the p/s. Suppose to up the rpms when at full lock to compensate for the extra strain put on the engine when turned lock to lock __________________ Just a truck 5.4 3v: 264hp 317ft lbs rock stock The "search" button, its not just for porn piecing together the next project faster than your first sexual experience

January 9th, 2012, 09:09 PM	#17
cliffyk Hardcore Enthusiast Join Date: Feb 2007 Location: Saint Augustine, FL Posts: 1,805 iTrader: 1 reviews	That is a possibility, the p/s pressure sensor reports p/s load to the PCM so that it can tell the IAC to pass more air... __________________ -cliff knight- My Mustang 2003 GT, UPR X, 24lb/h injectors, Magnaflow, 180° stat, PP 70mm TB & plenum, DF Commando, Steeda UDPs, Ralco RZ_flywheel, RAM HDX clutch, WX EFX COPs 3.73s, 262 rwHP/305 lb-ft. Flex-fuel: burns gas and rubber...

January 9th, 2012, 09:11 PM	#18
SSG Pate Premium Member 00 Mustang GT Vert/88 5.0 Join Date: Sep 2010 Location: Tennessee Posts: 1,766 iTrader: 3 reviews	Have you checked your driveline for loose bolts or a u joint? __________________ Proud Iraq and Afghanistan War veteran Powered By MMR 4.75L Stroker, Tuned at Kurgan Motorsports

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January 9th, 2012, 09:48 PM	#19
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	I didn't think that it would be the driveline since it doesn't get worse with higher speed. I just remembered that the night I moved from St. Louis to Indy my car developed a whine much like a bad belt or the tensioner going bad. It was completely random except for that the car had to be above 65 mph for it to occur. It only happened that one night and hasn't happened since. This makes me want to check the P/S first then the rotors. Mainly because everything else that everyone has mentioned has been replaced rather recently. Thanks for the help guys. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

January 9th, 2012, 11:38 PM	#20
Macunicorn Hardcore Enthusiast Join Date: Jul 2011 Location: Huntington Beach, Ca Posts: 1,219 iTrader: 0 reviews	Warped rotor in the front. __________________ Sig by Tricep

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