Hello, I have a 1990 firebird with a 3.1L Im need to find out the correct fuel pressure, I get 35 psi when I put a gauage on it. The chiltons book says it should be between 40 -47 and the Haynes book says it should be between 35 - 40. the car is giving me code 44, lean mixture. It starts fine but has a miss. I change the O2 sensor and the fuel filter. and a tune-up
- posted
19 years ago