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On the 171 possible causes:
"fuel pressure regulator malfunctioning
fuel filter plugged
fuel pump weak
evap canister purge valve leaking
fuel pressure sensor incorrect reading.
air leaks after the MAF
Vacuum leaks
PCV valve stuck open
exhaust leaks before the oxygen sensors
EGR valve tube/gasket leak
EVR solenoid vacuum leak
174 gives the same possible causes.
Check for a vacuum leak is my suggestion.
Where did u get the air mass meter from?
Secondary air injection damaged or malfunctioning or mechanically stuck valve."
From a post by NGM
"fuel pressure regulator malfunctioning
fuel filter plugged
fuel pump weak
evap canister purge valve leaking
fuel pressure sensor incorrect reading.
air leaks after the MAF
Vacuum leaks
PCV valve stuck open
exhaust leaks before the oxygen sensors
EGR valve tube/gasket leak
EVR solenoid vacuum leak
174 gives the same possible causes.
Check for a vacuum leak is my suggestion.
Where did u get the air mass meter from?
Secondary air injection damaged or malfunctioning or mechanically stuck valve."
From a post by NGM






