After installing EPROM ecu from another talon

[talon_frost]

I installed an eeprom ecu in my talon, the tach does some funny crap!!! is their a way to fix that?

 

[BigSorn]

like what kind of "funny crap"?

like jump around, or just not working?

 

[JusMX141]

Is the EPROM that you installed from a '90?

 

[talon_frost]

no its not from a 90 its from a 91-94 and yeah its jumping around, when i hit wot its just drop the needle to 0rpm , but when i dont punch it ...it works fine until about 4000rpm then goes up and down any help?

 

[yokotabrat]

You'll want to check this link out:

converting a 1990 to a 1991-1994 ecu system

 

[spoonman]

There used to be a guide on how you could put a 91-94 ecu into a 90 car and only switch out the power transistor for a 91-94 and rewire it but now the site will no longer show the guide as it has been replace by their product. I suggest buying one of these so then you have the ability to switch back to a 90 ecu and have to do less work.

KEYDIVER Chips -1991+ ECU in a 1990 DSM