Join Date: Sep 2008
Location: Fruitland Park,Florida
Shouldn't be any pressure on map sensor at any time. Map runs off engine vacuum, which is the opposite of pressure. Use your scanner set to test sensor data. With key on and engine not running, you should have around 5 volts on map circuit.
Crank engine and let idle. Map voltage should be in the 2 to 3 volt range. If voltage stays at around 5 volts with engine idling, map is not getting vacuum.
Your 02 on bank 1 is reading lean and your exhaust is smelling rich because pcm in response to a very lean o2 reading is adding too much gas to the mixture.
So while car is on scanner set to scan sensors look at your bank 1 o2 readings. They should be changing rapidly & going above & below the 450mv center line. Also check out your fuel trims to see how much fuel pcm is adding.
The lean condition on bank 1 can be caused by vacuum & exhaust leaks. A major problem is at the intake elbow where it goes into the throttle body.