shaking little 90

why does my '90 shake when my foot is on the brake when it is in
drive???

In article
>,
wrote:

> why does my '90 shake when my foot is on the brake when it is in
> drive???

It's idling too low, and/or it's misfiring. Try replacing the spark plug
wires first.

--
Lanny Chambers
St. Louis, MO
'94C

On Thu, 19 Mar 2009 18:07:37 -0700 (PDT), wrote:

>why does my '90 shake when my foot is on the brake when it is in
>drive???

You probably have a vacuum leak on the power booster (poviding of
course a 90 has such)




OzOne of the three twins

I welcome you to Crackerbox Palace.

wrote:
> why does my '90 shake when my foot is on the brake when it is in
> drive???

Not knowing precisely what you mean by "shake", I'll provide yet another
possibility: warped brake rotor(s).

--
John McGaw
[Knoxville, TN, USA]
http://johnmcgaw.com

Turn the idle up about 50 rpm and/or clean the thottle body with a
spray-type throttle body cleaner. Automatic transmission need to idle faster
than the manual transmission cars for several reasons. Auto transmission
miatas do seem touchier about a dirty throttle body. I would not worry much
about the spark plugs unless they are actually fouling, but miatas are
definitely hard on their spark plug wires, so that would be next on my list
of to-do's.

> wrote in message
...
why does my '90 shake when my foot is on the brake when it is in
drive???