Got a code 33 and replaced map want to see if the wiring from the map to the ecm is good. What would be a good way to do it?
Cars is a 91 rs 3.1
Thanks

 

If you do a Google search there are pictures and instructions. You'll need a 5v dc power supply, a digital volt meter and a vacuum pump. I use the usb port on a pc as the 5volt supply. Just identify which is +ve and -ve. I got an un-needed usb cable and cut the end off and stripped the wires. By applying a given vacuum to the map you can measure the change in output voltage from the map. Again the values are with the instructions. I'll try to find the link again.

 

Do a resistance check from the connector terminals to the ECM. Anything higher than 1.5ohms is a problem