Ive got a 306 with a vortech v1 42lb injectors, 155 pump, 4:1 fmu, holley 35-65 adj. regualtor, msd btm . Car was dyno tuned 2 years ago, has been running great. was getting 15mpg city and around 20 hwy. Just fixed ac 3 weekends ago, had to idle car up a little bit to run ac compressor, readjusted tps to spec, It ran fine for 2 weeks. Now its running pig rich , dumping raw fuel out left tail pipe, Air/ feul meter staying pegged out on rich on driver 02. I hooked up my snap on solus and did a key on engine off and key on engine running and had a code 42 : right o2 detects rich.. Car is still running fine just burning a lot of fuel. Has anyone had problems with ford racing 42lb injectors leaking? The injectors were bought brand new and now have 16k miles on them. Im thinking bad injector or bad / lazy o2. I have not pulled the plugs on this bank yet.