cars running rich need help

[rhino87]

bought a 1988 mustang with egr and o2 delete and cars runnng real real rich cant drive it scared to wash the cyl. so was wondering how i can lean the engine out or fix this only thing i can think of is switch it over to carb or put o2 sensors back in ? please give me your advise and input

[tonysilver82]

is it a stock cam or lopy cam and is it massair or speed density

[rhino87]

f303 speed density

[tonysilver82]

f303 speed density

thats not going to work because speed density needs a good steady vaccumn to the map sensor where massair reads the amount of airflows to calibrate fuel that cam kills alot of vaccumn its all over the place

[rhino87]

so basically your telling me go back to carb...... right

[86fiveoh]

or convert to mass air