I have a '98 Mazda 626 with 90,000 miles. Last year it coughed up a P1131 code, which I cleared. I looked for vacuum leaks, cleaned the MAF and replaced the plugs and wires. The code did not return until last week.
This time, however, I am experiencing driveability issues. When the accelerator is released, the idle drops very low, becomes unstable and often stalls. Does anyone know what I should be looking for? Once again, I cleaned the MAF and searched for vacuum leaks. If I can't get to the bottom of it soon, I'm going to have to put it in the shop for the first time its life. Thanks. RNR