IN- RANGE FAILURES

摘要

On our Mazda 626, the MAF range was a little high on the low end, and a little low on the high end, causing the engine to run rough and rich at idle, then to run lean and weak with the throttle and actual airflow above what the MAF was able to indicate. This explained the rich and lean P-codes in our case. There was no problem with the O_2 sensor. Debra gave us permission to replace the $175 sensor, and I would have retained the old part for a training aid if it weren't for the $75 core charge. The 626 drovaa lot better when we were done.