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Old 10-24-2016, 03:12 PM   #1
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Daughters focus

Hello all,

I recently bought my kid a 2000 focus with 84K miles on it as her first car. The car is in great shape but has a nagging vibration. I did some research on the car and chalked the vibration and noise to old mounts, but after I have changed all three mounts the car still has these issues:

AC on makes the car vibrate and make noise
AC off, car is "normal" even when turning wheel at standstill
Idle does not drop in either test case (Doubt IAC is dirty)
No CIL or other issues with the car

Given the fact that I have new mounts on the car and that it does not do this when the AC is not on -- can I localize this issue to an aging AC clutch that is just robbing too much power from the engine?

Anyone else dealt with the vibration that was only present when the AC was on?

Thanks!


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Old 10-24-2016, 04:52 PM   #2
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Welcome!

Moved this to General Tech Chat where you can find more information & get replies for the DIY repair question.

The first typical question is whether you used a FORD mount on the passenger side (rt. side of the car engine mount).

That one is the hydraulic mount that to date has NEVER been duplicated by the cheaper aftermarket types. Replacement by anything different may give temporary relief - or may not. Lifespan of a GOOD one that works is less than a year if not the Ford variety.

Second obvious question is whether the A/C is functional. Bad compressor of a non-functional system has even been known to cause stalling of the engine when it won't turn smoothly.
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Old 10-24-2016, 08:17 PM   #3
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Hello and thanks for moving the thread

The AC does work and blows cold air. There is no indication from the AC systems that it's not working property.

I did out in a set of anchor replacement mounts. Do you think it would be worth while to replace with Ford OEM ?
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Old 10-24-2016, 08:31 PM   #4
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Just the passenger side one, and you can save with mail order from a REAL Ford source (much Ford marked E-Bay comes as a cheap knockoff under the same part number).

Tasca, AutoNation White Bear Lake, Village Ford is a newer one advertising here (check their section for full discount details) are all reputable discount sources for Ford parts.

Need depends on how long it lasts, and how much the vibes bother you.

For any it helps to let the engine settle into place when installing them. Jack it around and tighten with a load on them and any can vibrate more.
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Old 10-24-2016, 11:08 PM   #5
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Quote:
Originally Posted by sailor View Post
Just the passenger side one, and you can save with mail order from a REAL Ford source (much Ford marked E-Bay comes as a cheap knockoff under the same part number).

Tasca, AutoNation White Bear Lake, Village Ford is a newer one advertising here (check their section for full discount details) are all reputable discount sources for Ford parts.

Need depends on how long it lasts, and how much the vibes bother you.

For any it helps to let the engine settle into place when installing them. Jack it around and tighten with a load on them and any can vibrate more.
Thanks for the heads up. I wasnt sure if the aftermarket mount was to blame, but its easy enough to take off and try. Without the AC on though the engine vibration is barely noticeable
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Old 10-24-2016, 11:18 PM   #6
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Tell ya what, the test is to jack under the engine slightly with a board to spread the load.

If it doesn't vibrate then, it's the mount.
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Old 10-25-2016, 01:11 AM   #7
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And Anchor (insert NAPA, Westar, DEA, or any other aftermarket one you want in there) are the worst. occasionally one will seem to work..............until the top blows out to put the parts into your belt to tear things up. I had two do that.

The A/C is likely fine, it's just that the extra load pulls the engine into vibration range. They pretty much all do it. May show even with A/C off once you hit winter, the cold mount vibrates then until the rubber warms up then the shaking disappears or greatly minimizes.

You don't state which engine, if the SPI (says Split Port on top of valve cover) then you need to be aware of how many of them blow up with little to no warning. The other engine being the zetec will live forever, just vibrate your face off the entire time.
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