i have a 1990 mustang and just wanted to know if i really need to have them. my set up is long tube no cats. all smog
equipment has been removed.just want to make sure it wont hurt my performance[/align][/align]

 

Maybe someone could give you some information on how to reprogram the ecu, but the O2 sensor controls how much fuel to run with a given oxygen content of the exhaust gases. Why dont you just weld a bung in the new header?

 

Thanks for the reply, i was told by someone i didnt need them, the bungs are there i have them plugged up as of now. im more of a carb guy this is my first time playing with fi. so i was going by what i was told by the guy helping me out,until heflaked out on me. so im just checking with other people to see if theyran with out them...

 

I am sure it will run, but I am not sure how well. Come over the 5.0 tech forum and post your question. You will get a lot more responses from folks that know more than I do. I dont want to steer you in the wrong direction.

 

I started to post there ill put it over ther now too thanks

 

you will get more power and better gas milage with them in. the computer uses the data that they pick up to supply the right amount of fuel. one question....why would you want to take them out???

 

its not that i wanted to take them out. this is my first time with fi im more into carbs the guy that was helping me when i started said i didnt need them. but he flaked on me so i got a new guy finshing up my car so im back on track now some what. ak all this to go carb with a turbo in the winter anyway. but once again thanks for the info