I'checked several times; still there....
the 3 wire are connected and have continuity to the ecu
I changed the map already with a known good
If i start with the obd2 system, there's no problem but switching to obd1, the map doesn't work.

anyone had this problem before?

 

anyone?
i'm waiting to put down my 260hp

 

Are you using a jumper harness?

That is a problem with the jumper harness if you are using one. If it works with the OBD2 to the factory main harness, and doesn't work with the OBD1 and the jumper than I would suggest pinning the MAP sensor on the Jumper harness.

If you do not have OBD1 pinouts for MAP, I can get them for you if you wish.

HTH.

 

I don't use a harness; all the wires are welded to the factory harness, having the both systems working (not in the same time)
the map sensor use the same 3 wire that the obd2 use