Quote:
Originally Posted by limpabit
He said it's running a bit rich.
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Is the lambda working properly in closed loop mode? I'd guess fuel trim would be worked out by the closed loop, so when you put it in a high load scenario a slight trim will be put on the open loop map, increasing the fuelling.
Have you thought about installing a wideband lamdba? They're quite handy for diagnosis, and are getting quite affordable these days. A friend just put one on his car, and it's very handy for adaptive mapping.
You can often test the coolant temp sensor, by unplugging it, as in my experience an unplugged coolant sensor results in the the ecu assuming a temperature (often around 80 deg C).
If your CTS isn't working properly (reading too high?), then the ecu might be throwing in extra fuel as a safety measure to avoid det.