going on my 3rd honda accord. never had problems till now. 91 accord turns on with low idle once she's warmed up idle picks up to about 1200rpms. drive good but after about 30 mins of drive she starts stalling and turns off . i got 2 codes. one is code 20 which is the eld. not sure what that is . the other is the o2 sensor. check engine light turns off at high idle {5-6000 rpms} when idle drops down the check engine llight turns back on.