<p>Your MAP signal should be very steady with the engine off (ignition on). I wonder if you have a bad ground.&nbsp;</p>

 

Only thing I know of without looking at the diagrams is an ECU ground issue. That to my knowledge is the only ground for the internal MAP sensor. Which if that if screwy than lots of things are screwy. I swear I did all I could to ensure great grounds. My retired EE father helped wire the car, but neither of us know this system.

 

basically all sensors should ground at the MS, and then the MS should ground on the block.

 

As far as I can tell the sensors at the ECU end have their grounds. I did find out the MAP sensor was set to the wrong thing. Fixed now. It seems to be either burning a hair of oil or still rich. I'm guessing a bit of oil. Would that possibly mess with the wideband readings?

 

I may have found the or an issue. The sensors ground for the 36pin ECU wasn't grounded. Wideband was run, but it seems that the "sensors ground" wasn't grounded. Going to ground it at the star ground by the throttle with the others.

I'm also wiring in the oil pressure sender. Anyone know what pin is a 0-5volt input for the ECU?