Bad Fuel Pump Relay?

[awd laser]

Alright we switched the ecu and the car starts now, its running okay now but the car isn't running perfectly, i took it for a drive and the car died on me after i got around the block. Boost gauge is dead now andthere is no check engine light but could it be bad o2 sensors? At idle the rpms go up then down then up and down etc etc...

[badinblack]

idle surge most of the time one of three things bis screw, intake leak or most common is the maf. At least that is my experience.

[awd laser]

i believe so, because the car exhaust is starting to smell like its burning rich, and when i get up to stop lights the rpms would dip and almost die. Also when i step on the gas pedal lightly just to keep up with speed the car jerks and makes a clunking noise until i press the pedal down more to give it more gas. Any ideas?