just recently i threw a o2 code and code 20.. so i re wired the o2 sen and added a extra ground to the motor and hooked up a air fuel gauge and no code are throwing now but when my motor is cold... been sitting for a while.. then 2 min down the road the fuel will start cutting like im running on empty tank of gas about to stall but then when i restart my car it runs Fine.. and i unhooked the AF gauge but before it was just stay on green, fully rich, but when it is about to start cutting off it will start dropping into yellow, then lean, then the gauge will go black.. but when i start my car the gauge will just stay full rich and run fine.. any ideas...??? its h22 in 98ek running P28 ECU..

 

^^

 

any guesses?

 

Do you have an stock fuel pump? Have you changed your fuel filter?

 

I've seen a few cars that bogged really bad from an bad O2 or bad O2 wiring. When it happens you can give it gas and it will just sputter then all of a sudden it's like you turned the car off then a few seconds later started it up abruptly. I would make sure that your wiring is correct and then jump the ECU connector to see if the code is still stored.