Quote:
Originally Posted by Wags391
I finally picked up an ALDL to USB cable and now have the capability to scan my ECM. Unfortunately, I don't know what all the info means. Does anyone have some experience reading ECM data and utilizing it usefully? I can even share a Excel spreadsheet with my trucks read-outs. What are some things to look for? What are normal readings for all values? What can I gather specifically about my rough idle with this information?
I have a 1992 S10 Blazer, 4.3L, TBI, 4x4.
Here's a taste of the info:
BLM- 144 at 525 RPM idle, MAP- ~35
BLM- 124 at 2000 RPM, MAP- ~62
The oxygen sensor ranges from 0 to .906. What's a good read out of an O2 sensor?
The coolant temp never got above 187.3.
Lots of info in this file.
Wags
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Front 02 sensors should swing from .2 to .8 volts with the average at .5volts.
Your sensor readings will depend a lot on engine load.