Discuss 1989 procharged mustang fuel issues on AllFordMustangs.com, the place for Mustang enthusiasts.
Welcome to our Mustang forums where Mustangers come together to hang out, discuss and enjoy their favorite Mustang hobby with fellow Mustang enthusiasts. We invite everyone to read, post, and enjoy our Mustang forum as well as the many other sections of our site.
You are currently viewing our forums as a guest. By joining our community you gain access to post topics, communicate with members, upload your photos and access many other special features. Registration is fast, simple and free so why wait, join our Mustang community today! If you have any problems with registration or your account login, please contact support.
i just bought an 899 mustang it has arf 185 heads forged bottomend 42 lb injectors and 20 pounds of boost a wide band o2 and a fuel areomotive tank and fuel rails with pump. the car surges at idle and i no its running lean 14.3 do i have a map sencor on this car and also thier is a piggy back on the computer its a form motersport box that has a rpm and air fuel raitio i have no clue
Sounds like you need a custom tune. Also, 42# injectors aren't big enough for a 302 on 20lbs of boost. I ran 72lb injectors on my 306 with 17lbs of boost, with a 70% injector duty cycle. 60# injectors would probably do it, but you're asking for trouble with 42s.
Just trying to help.
Ask me about the discount on UPR Products for AFM members!