Bad vibration durign idle speed.

My 1999 Toyota Tacoma vibrates badly during idle speed. I've taken it
to a few mechanics and they were unable to fix the problem. One
mechanic suggested changing the engine mounts. This fix didn't change
the vibration. The truck only gets the vibration after the car is
warmed up and once the RPMs drop below 1000. The performance of the
truck isn't effected by the vibration, its just annoying for driver
and passengers. Any ideas?

It sounds like it's missing.

Have you pulled codes to see if the computer is trying to communicate with
you?

Your truck is OBD II compliant, this means you can plug in a scan tool and
see what the computer thinks might be problematic. AutoZone will pull codes
for free, or give you the scan tool and let you do it. The data port is
located along the bottom of the dash, either completely exposed, or stashed
behind a cover that is clearly marked as containing a dianostic port behind
it. When you find the data port, it will remind you of an LPT2 printer
connector, except it only has 16 pins instead of the 40 pins found on the
printer. The look and feel of the pins is similar, that's why I describe it
that way.

Your truck can feel bad, and store a diagnostic code, but NOT turn the Check
light on. I think any problem that causes rough running at idle would set
the Check light on, but you should pull codes to see if the computer knows
something is not right with the universe.




<dan.lacroix.RemoveThis@gmail.com> wrote in message
news:f7d8fc41-ec38-4292-b215-3686c1e9c991@n58g2000hsf.googlegroups.com...
> My 1999 Toyota Tacoma vibrates badly during idle speed. I've taken it
> to a few mechanics and they were unable to fix the problem. One
> mechanic suggested changing the engine mounts. This fix didn't change
> the vibration. The truck only gets the vibration after the car is
> warmed up and once the RPMs drop below 1000. The performance of the
> truck isn't effected by the vibration, its just annoying for driver
> and passengers. Any ideas?