1989 Ford Taurus Taurus has heavy vibration when stopped

SHADOWWOLF14

MEMBER
1989 FORD TAURUS
6 CYL
FWD
AUTOMATIC
160,000 MILES

I have a 1989 Ford Taurus GL, 3.0 ohv, with an automatic transmission. Within the last year it has developed an increasingly heavier vibration that occurs only when stopped at a stoplight. Run fairly smoothly when in park and neutral and is fine once accelerating but the whole car shakes when stopped while in drive. Any idea what is causing this?

2 Replies

JAMES W.

MECHANIC
2,394 POSTS

When the shaking condition exists, is it like the engine is trying to die, but won't? My first thought is a problem with the idle speed control unit (IAC). Please advise.

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Tuesday, March 31st, 2009 AT 1:39 PM

SHADOWWOLF14

MEMBER
2 POSTS

To respond to your question, no it doesn't seem like the engine is trying to die. If anything it seems like the idle is a good bit higher than it should be (no tachometer so hard to tell but I would guess maybe as much as 600+ RPM higher than it should be) It feels kind of like having a big diesel tractor trailer truck parked next to it. The same kind of almost up and down rapid shaking. Hope that helps. Still sound like idle speed control unit?