Hey Gino93,
You said when you scanned the EEC-IV, you had no trouble codes. Wounldn't the MAP sensor show up as a code if it was bad? Or maybe it's just not getting the full range. I checked The EGR & EVP. Note EVP range should be greater than 100 to less than 5000 ohms, I have 600 - 3700 ohms. Could this be a functioning sensor but just not functioning in the full range as it should? Could the MAP sensor have a similiar problem? Will test MAP today an see whats up. BILL