SL 600 engine codes
 

Hello,
I hope you can help me. I own a 1997 SL 600 that has a Vortech V-2 Supercharger on it. There is no air pump on the car, as the supercharger sits in the pump's location. I recently got the following codes:

P0105 Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
P0150 O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
P0422 Main Catalyst Efficiency Below Threshold (Bank 1)
P0300 Random/Multiple Cylinder Misfire Detected
P0307 Cylinder 7 Misfire Detected
P0308 Cylinder 8 Misfire Detected
P0309 Cylinder 9 Misfire Detected
P0310 Cylinder 10 Misfire Detected
P0311 Cylinder 11 Misfire Detected
P0312 Cylinder 12 Misfire Detected

I seems to run ok but now has a rough idle and surges at idle, I presume from the misfire. It does not backfire though. Any help would be greatly appreciated. Is this an O2 Sensor and if so which one? :confused:
Thanks again for all your help,
Scott

blown sl-600 missing
 

looks like the manifold pressure sensor went south, leaned out the mixture-or fuel pressure dropped out.

SL 600 map sensor
 

Can you tell me the location of the map sensor and what it looks like?

found map sensor
 

I found the map sensor. There was a little amount of oil in the line. I cleaned it and the map sensor. Is there a way to test the sensor to see it it works?

problem solved
 

Mystery solved. Apparently when I took the car into the dealer for a smog tune, the mechanic had disconnected a vaccuum line that ran to the idle air control valve. What a freakin pain. You know you pay a lot of money to have the dealer smog your car and this is what I get. Thank god it is fixed. 600hp is a lot better without a vaccuum leak. :D