Where does the tach get it signal from?

[nitro325is]

Does the tach get the rpm signal from the crank sensor or somewhere else? Think my clutch is slipping at 4500+ when I step on it.Tach Revs rise slower but the engine sounds like it is spinning faster.

[E30godz]

i thought it got it from the coil?

[m42technic]

TD signal comes from the crank sensor.

[Jordan]

It gets the signal off the pulse sensor connected over spark plug wire #6

[m42technic]

It gets the signal off the pulse sensor connected over spark plug wire #6

The inductive pickup on the plug wire is used for cylinder identification only, not for engine speed.

[Jordan]

It gets the signal off the pulse sensor connected over spark plug wire #6

The inductive pickup on the plug wire is used for cylinder identification only, not for engine speed.

you sure about that? seems to me i have had it disconnected before (not on my car) and the tach didnt work

[m42technic]

It gets the signal off the pulse sensor connected over spark plug wire #6

The inductive pickup on the plug wire is used for cylinder identification only, not for engine speed.

you sure about that? seems to me i have had it disconnected before (not on my car) and the tach didnt work

100%

[Low Level E30]

I have an aftermarket (read, BIG) tach - wired off of the ignition coil. That's one place where you'll get your speed.