2003 c230 6 speed manual 1.8 m271

DTC that caused required freeze frame data storage p0301

Fuel system 1 status OL
Fuel system 2 status --
Calculated load value 70.6%
Engine coolant 169 °F
Short term fuel trim 0.0%
Long term fuel trim -9.4%
Intake manifold absolute pressure 19.9psi
Engine rpm 2655

Stored codes
P0301 cylinder 1 misfire detected
P0101 mass or volume air flow a circuit range/performance

Pending codes
P0120 throttle/pedal position sensor/switch a circuit
P0172 system too rich bank 1

Before this car would drive fine, just couldn't rev over 4000. Removed injectors to replace torn o ring, and also removed exhaust manifold to repair a crack/exhaust leak. Upon reinstall, I can not rev over 2500 without the engine wanting to fall on its face. Once it's warmed up, it idles beautifully. Just can't drive it due to the rpm limitations.

Replaced pedal assembly, maf, spark plugs. Unplugging injectors/coil packs one at a time drastically changes idle.

 

did you buy a bosch?

 

it was an oem. BUT it was used.

 

Try unplugging it and see if anything changes. No change = bad MAF.