Just saw,
MP - should read near 100 when the key is on, but the engine is not running. At idle it should read 30-50 depending on camshaft and engine type.
Ok this just dawned on me, I have a digital dash, so there is no map sensor on the PS of the car near the relays, only the hobbs switch for the turbo lights in the dash.
The only 3 bar sensor I have is one I added hooked up to my alky.
So would I have to tap into that sensor, not the wires behind the dash?