car wont stay still!! - 2003-04 Mach 1 Registry Owners Club

dark-knight · 01-26-2012, 07:11 PM

While im on the highway the car sways side to side sometimes and its hard to keep it in the lane. and theres a good inch of play in the steering wheel before anything happens. I've never had this problem before the car was running again.

I thought maybe it was the alignment so i got a free one from a friend. but it still does it. maybe the rag joint in the steering shaft? idk. any ideas.

jpilone · 01-26-2012, 09:07 PM

Make sure the steering shaft is tight on the rack

systemdz · 01-26-2012, 09:28 PM

Mine does that too. I'm at 99xxx miles so I'm assuming it's just a wore out rack.

Flash88 · 01-27-2012, 04:04 PM

could tires make it be this bad?

nickster · 01-27-2012, 04:09 PM

check your tierod ends,wore out or nut lose

94-95-04stangs · 01-27-2012, 07:40 PM

There is a tsb about the rack on the 04 mach I seen it on alldata yesterday ill look again Monday and get the numbers

jeff33702 · 01-27-2012, 09:27 PM

If you can jack it up, try to turn the tires by hand - wiggle them back and forth and watch for areas of slop. Of course, use jack stands and be safe.

newedge32v · 01-27-2012, 11:54 PM

Mine did the same, i had my rack and pinion replaced and now its normal. I did the outter tie end rods and ball joints at the same time. Just be careful i heard bad inner tie end rods can eventually make your wheel fly off lol not sure though.

newedge32v · 01-27-2012, 11:55 PM

And of course alignment right after.

311-420 · 01-28-2012, 11:25 AM

Quote:

Originally Posted by nickster

check your tierod ends,wore out or nut lose

Yep. inner tie rod ends would be my guess.

dark-knight · 01-29-2012, 09:50 PM

ill check all those things out. just in case:

i have a UPR K-member with A arms and coilovers. and steeda bumpsteer kit.

I just looked at the front tires and their pretty bad. no threads showing or anything, but its on the wear bars.

WNTAMACH1 · 02-20-2012, 10:27 AM

Quote:

Originally Posted by dark-knight

ill check all those things out. just in case:

i have a UPR K-member with A arms and coilovers. and steeda bumpsteer kit.

I just looked at the front tires and their pretty bad. no threads showing or anything, but its on the wear bars.

How do you like the upr k, a arms and coil overs? Seem strong? Did it move your wheel in the wheel well any? Thanks!

SGT GIPP · 02-26-2012, 07:38 PM

Look under the rear of the car and check your bushings on the upper control arms, diff carrier, and the lower control arms. This will make the car sway. I just changed mine and every thing is nice and tight. If it sways during acceleration, then corrects itself when you release the throttle, then this is your problem.

01-26-2012, 07:11 PM	#1
dark-knight Registered User Join Date: Sep 2009 Location: jacksonville fl Posts: 224	car wont stay still!! While im on the highway the car sways side to side sometimes and its hard to keep it in the lane. and theres a good inch of play in the steering wheel before anything happens. I've never had this problem before the car was running again. I thought maybe it was the alignment so i got a free one from a friend. but it still does it. maybe the rag joint in the steering shaft? idk. any ideas. __________________ built 290 stroker \| 150shot \| driver mod

01-26-2012, 09:07 PM	#2
jpilone Uncertified Gynocologist Join Date: Jun 2011 Location: Boca Raton, FL Posts: 738	Make sure the steering shaft is tight on the rack __________________ '04 Mach 1/5-Speed/CO SOLD 10/31/15! '16 S550 GT 5.0 Traded 7/28/16 '16 Shelby GT350 Track Package/White/Blue Stripes!

01-26-2012, 09:28 PM	#3
systemdz systemdz Join Date: Mar 2010 Location: Murray, KY Posts: 1,131	Mine does that too. I'm at 99xxx miles so I'm assuming it's just a wore out rack. __________________ 2003 Mach 1 Torch Red, 4.6 WAP block .20 coated manley pistons, manley h-beams, 98 cobra cam, BTR springs, Fererra valves, BC auto 4r75w w Freddie Brown MVB w brake, CircleD 4c, built rear and baseline drag suspension. NOS wet kit w NANO.

01-27-2012, 04:04 PM	#4
Flash88 Registered User Join Date: Jul 2011 Location: jacksonville Posts: 664	Re: car wont stay still!! could tires make it be this bad? __________________ ___________________________ 70mm single turbo.

01-27-2012, 04:09 PM	#5
nickster certified MACH 1 nut Join Date: Apr 2004 Location: nova scotia canada Posts: 1,520	Re: car wont stay still!! check your tierod ends,wore out or nut lose __________________ shm stage 2 cams,dynomax longtubes,2 3/4 h pipe homemade,excal2,wideband commander,proracers package,60#injectors,2400 mas air,eaton,forged motor,4# metco ring,1 of a kind pully bridge,and great #s on a stock eaton 476.88rwhp-451.74rwtq

01-27-2012, 07:40 PM	#6
94-95-04stangs Registered User Join Date: Sep 2011 Location: muscadine,ala Posts: 150	Re: car wont stay still!! There is a tsb about the rack on the 04 mach I seen it on alldata yesterday ill look again Monday and get the numbers

01-27-2012, 09:27 PM	#7
jeff33702 Registered User Join Date: Feb 2007 Location: St. Petersburg, FL Posts: 959	Re: car wont stay still!! If you can jack it up, try to turn the tires by hand - wiggle them back and forth and watch for areas of slop. Of course, use jack stands and be safe. __________________ www.bestmustangparts.com for the BEST parts for your Mustang! 727-386-8088 Ask for prices on: Maximum Motorsports Steeda Forgeline Wheels JLT Intakes BMR Suspension SOLD 03 Mach 1 - 17lbs of Whipple 01 Cobra - 99% stock (Catback only) 68 Coupe - My first car ever 93 Coupe - www.93coupe.com

01-27-2012, 11:54 PM	#8
newedge32v Registered User Join Date: Jan 2012 Location: Nocturnal Wonderland Posts: 351	Re: car wont stay still!! Mine did the same, i had my rack and pinion replaced and now its normal. I did the outter tie end rods and ball joints at the same time. Just be careful i heard bad inner tie end rods can eventually make your wheel fly off lol not sure though. __________________ 2003 OW mach1...under construction.

01-27-2012, 11:55 PM	#9
newedge32v Registered User Join Date: Jan 2012 Location: Nocturnal Wonderland Posts: 351	Re: car wont stay still!! And of course alignment right after. __________________ 2003 OW mach1...under construction.

01-29-2012, 09:50 PM	#11
dark-knight Registered User Join Date: Sep 2009 Location: jacksonville fl Posts: 224	Re: car wont stay still!! ill check all those things out. just in case: i have a UPR K-member with A arms and coilovers. and steeda bumpsteer kit. I just looked at the front tires and their pretty bad. no threads showing or anything, but its on the wear bars. __________________ built 290 stroker \| 150shot \| driver mod

02-26-2012, 07:38 PM	#13
SGT GIPP Registered User Join Date: Mar 2010 Location: Macon,Ga Posts: 220	Re: car wont stay still!! Look under the rear of the car and check your bushings on the upper control arms, diff carrier, and the lower control arms. This will make the car sway. I just changed mine and every thing is nice and tight. If it sways during acceleration, then corrects itself when you release the throttle, then this is your problem.

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