Quote:
Originally Posted by XfireZ51
Don,
I would go w Hans' suggestion and look at the chip. All LT-5 MY have 2 calibrations for them. If urs is AXFK, then its the original calibration and GM issued a second one which is the BFXB calibration. So I would make sure that u have the revised cal to begin w.
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Mine is the AXFK chip. Guess I'll need to add a new chip to the repair list. Anyone know what the second chip changed?
As an update, I checked the ignition today - spark seems good on all 8. Also checked the A.I.R system using the tech 1. I can hear the pump come on for a few seconds and the O2 sensors drop to 0 mV on the left and 18 mV on the right. Seems to be working OK.
When doing the spark check, I did notice a hissing sound near the rear of the engine that lasted for 10 sec or so after shutting down. Something leaking? Is this normal?
Will investigate further.
Cheers,
Don