99 pontiac Grand Am. Code is P0172System Too Rich.
Fuel Pressure is showing 40. Is that good? Also, How do I do a drop test on Fuel Injectors?
Thanks

1. check air filter - replace if dirty
2. check maf sensor - clean with maf sensor cleaner
3. check your fuel pressure regulator by removing vacuum line from the top if you see fuel in the vacuum line - replace FPR.
4. check your oil level in the morning - if it shows very high your engine oil is diluted with fuel. - replace oil.
5. check and clean IAC passage