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Car shakes when in drive and foot is on the break

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New User

Jan 18, 2021, 1:03 AM

Post #1 of 2 (104 views)
post icon Car shakes when in drive and foot is on the break Sign In

Hi all,
I have a ford territory 2008 4 speed automatic, it has a shake that only happens when the engine has warmed up and been driven for 5 mins or so. When it is cold the shake is very minor but when warm it can make it that i cannot see out the wing mirrors due to the vibrations.
So, when the car is being driven it is fine, engine and gear box is smooth, no issues at all.
when you are coming to a stop the car shakes maybe around 5kph and gets worse when the car is totally stopped. in neutral (1500rpm) the cars fine although the revs occasionaly bounce +- 100, but keep you foot on the break and put it in drive the revs drop as they should, the back wheels engage and the car squats a little (RWD). as he revs drop the car shakes and the revs move uo and down a little.
I took the car for a service and asked him to look at it, said the engine mounts are perfect no dramas there, and to change the coil packs. coil packs got changed and made no difference.
I am thinking maybe do the spark plugs, idle air control valve or a transmission service.
any advice would be much appreciated.
Thanks in advance.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 18, 2021, 4:40 AM

Post #2 of 2 (99 views)
Re: Car shakes when in drive and foot is on the break Sign In

This vehicle isn't sold to this US based site so can only say a couple things on it. I don't know anything that normally idles at 1500 RPM is possible for a cold idle - forget that.
Go easy on tossing parts at it, that's a waste of your time and money. BTW, spark plugs tell the story so if when there LOOK at the old ones to see if the same as each other for evidence - all the time not just for a problem.

The "shake" and high idle suggest to me "unmetered air" is getting into intake. That would be a vacuum leak most likely there are assorted ways to hunt those down a well equipped shop with a smoke machine or other ways work too, some are dangerous I'll skip that for now.

Shop didn't find anything but motor mounts are OK? Did it misbehave for them like you describe? Perhaps another opinion is needed that's not where I'd be looking.
It's not right IDK why techs in biz for work didn't acknowledge that is wasn't and didn't know so perhaps the next shop is what you should be looking for.
BTW, Brakes is spelled as I just did. It wouldn't be caught by spell checking as both are words just know the spelling BREAKS means nothing to a vehicle,


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