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Hyundai Excel Ambiguous Codes Read - continued
This is a continuation of a post with the same name. Briefly, the 91
Hyundai Excel I own idles roughly and smokes sometimes even though it seems mechanically OK (cylinder pressure within spec). I am hoping COMBOVERFISH responds to this post as he was absolutly right in suggesting a multimeter would show a trouble code when a scope did not. After the last post, I replaced the oxygen sensor and the symptoms are similar. Diagnostic Codes 1 2 5 2 5 2 5 2 5 ... which I take to mean Barometric pressure sensor. So far I have no idea where this is or how to test it. Oxygen Sensor I replaced the sensor although a good ground may have prevented me from detecting that the old one was working. In any case the behavior is unchanged. On warm start, I measure between 150-300 Mv initially. After 5 minutes the signal has increased to the range 890-1000 Mv. The engine idles roughly and when accelerated, smokes. Unhooking the oxygen sensor seems to produce no change in the smoking behavior or the oxygen sensor reading. Am I reading the codes correctly and what is the barometric pressure sensor? Is it possible that the oxygen sensor is not connected to the ECM? Any suggestions happily accepted. Thanks |
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