Originally Posted by dpieroni3

P0172 is telling you the engine is getting too much fuel (running rich). Did you try dis connecting the fuel pressure regulator vacuum hose and check for fuel (running and not running) there is a diaphram in side that ruptures, was common. The psi regulator is on the end of the left (front) fuel rail. vacuum hose by the maf sensor. Can also try to disconnect the evap line from the engine and plug the engine side to see if fuel is coming in from the evap system. If you can get to a scan tool data would be helpful. could be a skewed sensor (example: oxygen sensor fixed rich causing the engine to run lean). Hope this is helpful.

Originally Posted by carfixer007

You just need to remove the things that need be. Take pictures as you go. Remove the throttle body completely off and make it look like new. That will likely fix your idle problem.

Originally Posted by dpieroni3

P0172 is telling you the engine is getting too much fuel (running rich). Did you try dis connecting the fuel pressure regulator vacuum hose and check for fuel (running and not running) there is a diaphram in side that ruptures, was common. The psi regulator is on the end of the left (front) fuel rail. vacuum hose by the maf sensor. Can also try to disconnect the evap line from the engine and plug the engine side to see if fuel is coming in from the evap system. If you can get to a scan tool data would be helpful. could be a skewed sensor (example: oxygen sensor fixed rich causing the engine to run lean). Hope this is helpful.

Originally Posted by sissylala69s

I plugged in my scanner the 02b1s2 reads 99 whether idling or getting the rpms up
I that a sure sign the sensor is bad?

Originally Posted by sissylala69s

I plugged in my scanner the 02b1s2 reads 99 whether idling or getting the rpms up
I that a sure sign the sensor is bad?