Join Date: Sep 2008
Location: Fruitland Park,Florida
Code scan & data scan will catch a bad map and many other problems. Map voltage when idling should be between 1 & 2 volts. Mine was showing 4.72 volts, essentially not working at all. On a speed density car map is very important because of no maf sensor.
Keep in mind that not just sensors cause problems. Wiring & connector problems cause much havoc in older cars.