Results 1 to 10 of 10

Thread: Annoying vibration on highway..

  1. #1
    turbo addict
    Join Date
    Jul 2007
    Location
    Niagara Falls, ON
    Posts
    7,548

    Annoying vibration on highway..

    Hey folks,

    Getting this really annoying vibration, it's inaudible but you feel it through the wheel. It's the '95 Escort Wagon. at a "certain" speed it kicks in, and it's like badadadum 1 2 3 4 badadadum 1 2 3 4 badadadum 1 2 3 4 badadadum

    Repeating at about 5 second intervals... The annoying thing is, if the road is slightly bumpy at all, that overwhelms it and you don't feel it, so it's only on really smooth bits of highway. (Sux for testing)

    If I go the same engine RPM (low gear) at a lower speed, I don't get it. If I go the same speed at higher RPM, I don't get it. It doesn't seem to do it under medium or hard acceleration, or if you lift off the gas, it's only steady speed with your foot on the gas maintaining speed or accelerating very slightly.

    If I go fast enough (On a private road in Mexico) it goes away.

    It seems like it's a beat frequency, and yah, I mathed it out, motor is at about 3100 which is 51ish revs per second, and the tires are rotating 900 times a mile, which works out at about 18ish revs per second, and 3 times that is 56ish, f1-f2 = beat frequency, = 5 ... hmmm

    So it seems like tire rotation and engine rpm are getting close enough to make a beat somehow... but at all other speeds, I can't detect enough unusual vibration in either. (Well the 1.9 CVH was never the smoothest motor in teh world evarrrr)

    My tires are slightly upsized, put 195/60R14s on it on BMW rims this summer... I'm having a feeling that if I had (a balanced) set of stock size to try that it would not happen. Just the 10 revs/mile difference.

    Also wondering if new engine mounts would help... or not, because I'd go for poly and they'd transmit more...

    Think I'm gonna try clocking a front wheel 90 degrees tomorrow, just in case that can damp a very faint vibe from them. See if it changes.

    Ideas?

    RW222
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  2. #2
    Super Moderator Turbo Mopar Staff contraption22's Avatar
    Join Date
    Dec 2005
    Location
    Havertown, PA
    Posts
    9,517

    Re: Annoying vibration on highway..

    Can you watch your 02 sensor and see if the condition is in sync with it's cycling?
    Mike Marra
    1986 Plymouth Horizon GLMF "The Contraption" < entertaining sponsorship offers
    Project Log:
    http://www.turbo-mopar.com/forums/showthread.php?69708-The-Contraption-2013-14&highlight=

  3. #3
    Buy my stuff!!!!!!!!!!! :O) Turbo Mopar Vendor turbovanmanČ's Avatar
    Join Date
    Dec 2005
    Location
    Abbotsford, BC
    Posts
    44,167

    Re: Annoying vibration on highway..

    Didn't we go thru this already?

    Tire balance, bad tire, motor mounts, natural resonance of the powertrain. Try unplugging the LU if possible.
    1989 FWD Turbo Caravan-2.5 TIII, GT35R, auto, a/c, cruise, pwr windows/locks, fully loaded with interior and ran with full exhaust. RETIRED FOR A FEW YEARS! 12.57@104 :O)
    1984 Chev Getaway van, 6.2 Diesel with a remote mounted turbo setup burning WMO-For sale.
    2003 GSW 2.0L TDI, auto, fully loaded, modified, 360K-wife's.
    2004 GSW TDI, 5 speed, fully loaded, modified.

    Aurora ignition wires for sale. Link to info

    Super60 roller cams or custom/billet cams. Link to info

  4. #4
    turbo addict
    Join Date
    Jul 2007
    Location
    Niagara Falls, ON
    Posts
    7,548

    Re: Annoying vibration on highway..

    Yah the previous one was with out of balance tires that were also going bulgy, this is a different set...

    ---------- Post added at 02:35 PM ---------- Previous post was at 02:33 PM ----------

    Quote Originally Posted by contraption22 View Post
    Can you watch your 02 sensor and see if the condition is in sync with it's cycling?
    May be making a narrow band gauge soon, so yeah, I'll check on that, because I did think that it seemed almost like a faint miss every few revolutions.

    ---------- Post added at 02:37 PM ---------- Previous post was at 02:35 PM ----------

    Oh and it does it over about a 600 rpm 10mph range, so and I can just give it enough throttle pressure, like going uphill where it kicks out the lockup, when I'm near the bottom of the range, such that rpm increaase doesn't take it out of the range, and it still does it, so it's not lockup shudder.

    ---------- Post added at 02:40 PM ---------- Previous post was at 02:37 PM ----------

    I'm thinking that not feeling anything at same road speed at 5000 RPM in lower gear kinda eliminated serious/detectable out of balance issues on the rotating assembly (i.e. wheels, tires, rotors, driveshaft, output side of tranny)
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  5. #5
    Hybrid booster
    Join Date
    Nov 2008
    Location
    South West Washington State
    Posts
    965

    Re: Annoying vibration on highway..

    I rode in a grls escort of about the same vintage that had a similar problem, every time the torque converter would try to lock up the car would vibrate like mad, sounded horrible. is yours an auto?

  6. #6
    turbo addict
    Join Date
    Jul 2007
    Location
    Niagara Falls, ON
    Posts
    7,548

    Re: Annoying vibration on highway..

    Yah, auto, but it unlocks and it's still there (As long as I don't have the throttle too far open) also, I can get lockup as slow as 40mph and no shudder there.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  7. #7
    The moderately moderate moderator Turbo Mopar Staff
    Join Date
    Dec 2006
    Location
    Akron, Ohio
    Posts
    6,870
    Front wheel bearings are the first thing I'de look at. Next, outer tie rod ends. I have seen tracers that would do something similar and one of the tie rods would be loose. It would start small and get worse as the play got worse.
    Bryan
    86 GLHS #161, 2016 Impala
    SDAC National Member, SDAC Buckeye Chapter Member

    A man has got to know his limitations.....

  8. #8
    turbo addict
    Join Date
    Jul 2007
    Location
    Niagara Falls, ON
    Posts
    7,548

    Re: Annoying vibration on highway..

    I think Bryan gets the prize, now seems like drivers front tie rod again, cheap sh!t won't last 2 years. Wasn't enough play in it to feel last month, now can feel it.... though the vibe hasn't got any worse, it just does it a little at other speeds now, and given "smooth" bumps, i.e. ones that don't have sharp edges, I can hear it knock very lightly at low speed.....

    Although... I do have another cheap balljoint that side, where the passenger one of that brand only lasted a year, and I felt a slight squirm in steering angle change, unlike tierods and more like BJs, so that might need yet another fugger.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

  9. #9
    The moderately moderate moderator Turbo Mopar Staff
    Join Date
    Dec 2006
    Location
    Akron, Ohio
    Posts
    6,870

    Re: Annoying vibration on highway..

    Thankfully they are easy to do on scorts. I hate it when you put a cheap part on (especially when you read about others claiming how good they are and how long they lasted) only to find out you were right, it was cheap and didn't last long.
    Bryan
    86 GLHS #161, 2016 Impala
    SDAC National Member, SDAC Buckeye Chapter Member

    A man has got to know his limitations.....

  10. #10
    turbo addict
    Join Date
    Jul 2007
    Location
    Niagara Falls, ON
    Posts
    7,548

    Re: Annoying vibration on highway..

    Well, guess I was feeling it wrong when I wrestled the tire last time... a better inspection Sunday morning revealed the boot on the BJ had all but disintegrated (REALLY??? the rubber bands I get round broccoli last longer!!!) and that was unstable... then manipulating the tie-rod directly couldn't feel any play in it... so went and got a "certified" BJ with a year warranty (better than 30/60/90 day ones I hope) and stuck that on yesterday afternoon...

    ... and the vibration got a lot fainter again, back to how it felt when I first started to notice it... so loose BJ was making it feel worse in the last couple of weeks but still something is up..

    Inspected the tire again very closely. Only thing I can see with it, is that it seems to have a slight hollow in one spot... checked and rechecked, it's not a bulge either side, it's a hollow How the hell do you get a hollow??? ... guess I'll be swapping tires around again.
    DD1: '02 T&C Ltd, 3.8 AWD. DD2: '15 Versa Note SV, replacing.. DDx: '14 Versa Note SV << freshly killded :( ....... Projects: '88 Voyager 3.0, Auto with shift kit, timing advance, walker sound FX muffler on 15" pumpers wrapped in 215/65/R15 H rated Nexens.... and a '95 phord escort wagon PnP head << Both may need to go :( ..... I like 3.0s ... so??? ... stop looking at me like I've got two heads!

Similar Threads

  1. What is this annoying noise !!!!!
    By shadowdude in forum "I need help!"
    Replies: 53
    Last Post: 06-10-2010, 06:41 PM
  2. Annoying Stutter and hesitation!
    By 1984rampage in forum "I need help!"
    Replies: 22
    Last Post: 03-22-2010, 03:09 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •