hi. my 92 735i's CHECK ENGINE light comes on, too. the problem though is, when it comes on my acceleration gets affected. when i step on the accelerator when the light is on, the car is kind of like choking and the car wont speed up. but after a few seconds without letting the gas pedal go, the light will somehow disappear and i'm back to normal driving. the problem only happens though, if my gas tank has about 1/4 tank left. can anyone help with this issue? thanks.