thrashingcows

So my question is this....Will the magnets on the harmonic balancer for a tach effect the CPS sensor?

I was running the two magnets...180* apart on my fluidamper balancer for a tach. This was on my 89 motor so I did not have a CPS sensor. But since I'm switching to the 93 motor from the 4wd donor I have been in a bit of a confused state as to what I should do?

My Tach gauge is an Isspro R5501...so I believe it only works with the magnetic pick-up?

Thoughts?

simplysmn

I think you may have to switch Tach's to the other style .

peddlebike

What's a CPS sensor?
Have the magnetic pick-up on my '91.5 W250 ... Isspro tach.
The mid '91's have no tach wiring harness.

thrashingcows

CPS = Crank Position Sensor

crazy clem

I believe that's why the autometer pick up runs off the alternator?

tech-eh

i mounted mine on the alt as well auto meter but it does jump around at low rpm stability after 1100 rpm is good . Clem does your jump and if not were did you mount yours

1990 all manual no electronics though

thrashingcows

After some info from a board member...on another site....I decided to do a little digging on the Geno's website.

The R5503 is just a 4K tach...as opposed to the R5501 being a 3K tach. The funny thing is on their website the R5501 tach description only lists the usage of the magnetic pick up. But in the R5503 description it says to use the magnetic pick up...OR...the wiring harness adapter for 92/93 trucks.

I checked their link for the wiring harness, and it specifically lists the R5501 being used with this their conversion harness, and the the 92/93 wiring.

Here's the link....

http://www.genosgarage.com/TACH-TO-O.../#.Ur0kerS2KSo

So looks like I just need to make up a wiring harness to go from the factory 92/93 Tach plug in the wiring...to my R5501 tach...Sweet!!

crazy clem

Tech eh its on a buddies truck and yes it does jump