Reading RPMs with no Tach gauge

bigalpha

Moderator

Location

Tucson, AZ

• Mar 22, 2011

• #1

Is there a way to read the RPMs in a RENIX-era engine if you don't have a cluster with a tach?

I know that there are two 'diagnostic' connectors right below the pressure bottle in the engine bay.

Thanks.

 

gradon

NAXJA Forum User

Location

DC

• Mar 22, 2011

• #2

With the Split Second PSC1, I have to tap into the cam sensor output to get rpms. . .

 

GrimmJeeper

NAXJA Forum User

Location

Gardena, CA

• Mar 22, 2011

• #3

are you looking for something permanent? if not there are inductive tachometer tools that clamp around a spark plug wire.

 

bigalpha

Moderator

Location

Tucson, AZ

• Mar 22, 2011

• #4

Temporary to help troubleshoot some idling problems. It's hard to tell RPMs without a gauge.

 

GrimmJeeper

NAXJA Forum User

Location

Gardena, CA

• Mar 22, 2011

• #5

something similar to this is what I was talking about:

http://www.harborfreight.com/3-1-2-half-inch-lcd-multimeter-with-tachometer-kit-95670.html

That's about as cheap as you're going to find, they also have timing lights with digital readouts that will show you RPMs for around the same price via autozone and such.