[Mgs] Tachometer maxes out @ 2500 rpm

[Paul Hunt]

Try tapping it when the engine is doing 3000 or 4000.  If the needle jumps 
up it is a physical problem in the movement.  If nothing happens it could be 
electrical or physical.  You *could* open it up and connect a voltmeter to 
the movement terminals (which is all the movement is anyway) and see what 
happens over 2500 rpm.  If the voltage keeps going up but the movement 
doesn't again its physical.  If the voltage stops going up it is electrical 
i.e. tach electronics.

PaulH.

----- Original Message ----- 
> Basically, the subject says it all.. the car will idle @ 800 rpm and the
> tach will display 800 rpm... I bring up the rpms using the accelerator 
> pedel
> and the tach will follow the engine speed untill it reaches @ 2500 rpm, 
> then
> the tach freezes and the motor will increase in speed.
>
> When the engine rpms come down below 2500, the tach starts working again.