1990 miata

i bought my 90 miata 1 mth ago, car seems to shake when foot is on
brake...can anyone tell why this is happening?

thanks

wrote:

> i bought my 90 miata 1 mth ago, car seems to shake when foot is on
> brake...can anyone tell why this is happening?

Several possible reasons, first check the brake rotors to be sure
they're not warped. While you're under there look for any loose tie
rod ends or worn suspension components.

On May 24, 12:06 pm, XS11E > wrote:
> wrote:
> > i bought my 90 miata 1 mth ago, car seems to shake when foot is on
> > brake...can anyone tell why this is happening?
>
> Several possible reasons, first check the brake rotors to be sure
> they're not warped. While you're under there look for any loose tie
> rod ends or worn suspension components.

its an auto,when i put it in neutral with my foot on the brake it
doesn't shake

Sounds like a miss at idle under load. Since the car is a 90, it may have a
lot of miles on it.
First, check for vacuum leaks (cracked hoses, etc.) Next, see if it does it
with the emergency brake on instead of the regular brakes.
I suspect low vacuum -- exactly why is the question.

" its an auto,when i put it in neutral with my foot on the brake it doesn't
shake"
> wrote in message
ps.com...
> On May 24, 12:06 pm, XS11E > wrote:
> > wrote:
> > > i bought my 90 miata 1 mth ago, car seems to shake when foot is on
> > > brake...can anyone tell why this is happening?
> >
> > Several possible reasons, first check the brake rotors to be sure
> > they're not warped. While you're under there look for any loose tie
> > rod ends or worn suspension components.
>
> its an auto,when i put it in neutral with my foot on the brake it
> doesn't shake
>

In article om>,
wrote:

> its an auto,when i put it in neutral with my foot on the brake it
> doesn't shake

The idle speed may be set too low. Easy fix.