Dyno Operator Mistake

[fastg]

I noticed the AFR display was not working, stuck at 14.7. So I checked the O2 sensor. Common data shows the heater element should run about 10-40 Ohms, mine is 1.5 Ohm. Order new sensor genuine Delco $200 shipped, well that also reads 1.5 Ohm! So start checking the engine harness. The heater element shows 12v but the ground wire shows -2.5v, now that is really strange. Just about to start ripping onto the harness, but luckily I decided to see if I could use the Hondata software to monitor the actual data from the O2 sensor.  I could see no real time data, I would have expected a MIL code. OK lets check the closed loop configuration, WTF the wideband it set to an external sensor, Grrrrrr. The Dyno operator had switched to an external Dynojet sensor because he was concerned the Hondata values were incorrect. The Hondata values were good but he forgot to switch it back. He has found me a lot of HP and totally transformed the overall performance so I cannot be too upset. At least I have a spare sensor now:)

 

Graham