RPM signal in ECU?

[Per Lindgren]

Rev limiter perhaps? Cuts the fuel when revs reach a certain number?

PerL
87 Cq


Doyt W. Echelberger wrote:

> What does the ECU do with the RPM signal? How does the ECU use the RPM
> signal? My 87 5ktq apparently runs just fine without such a signal (2111
> code).  I'm going to replace the RPM sensor, but I'd like to know what
> the
> signal does.
>
> Doyt Echelberger
> Ohio, USA
>
>
>