Just installed an '01 Sport Trac Dash in my '95 Ford Ranger 2.3l 5spd. It has a tach while my original dash did not.

Everything works correctly, properly, and accurately except for the Tach. It acts sluggishly and does not go above 2500 rpm.

Anybody know what would cause this? Where does it get its signal from? What could I troubleshoot or replace to possibly fix this?

 

where did you hook the tach sensor up to?

 

I am very curious about this too.

I put a 99 dash with tach into my 95 4.0 that didn't have a tach. My tach has never gone above 2800, even at WOT in 1st gear.

Plus my temp gauge is way too high, but I know what that problem is.

I hope someone has an answer to the tach problem.

 

if im not mistaken the tach hookup is at the distributor...im not 100% sure tho

 

I did not hook anything additionally up. The dash had the same 3 cable spots as the original non-tach dash. I plugged them in and screwed the dash into place. There were no other cables or connectors on the new tach dash.

Do I need to change one of the cables in the harness or something?

 

almost sounds like bad clusters. i have swapped many 98+ clusters in my 95 without any issues, other than the temp gauge.

 

anyway to find out where it gets its signal from? Or what fuses may effect it?

 

Okay found out some more info between another similar thread and a mechanic. Apparently the 4cyc rangers don't have a ground in the instrument cluster for the tach as it is not needed. But the larger engines have a ground for their tach because for some reason it is needed.

The problem with the weak signal is that the cluster is from a larger engine and requires a ground. I guess now I need to find out which wires I need to switch or solder into to make the proper ground. Anyone have any clue?

 

you prolly could go right to the firewall im not 100% sure tho