Do the o2 sensors come into play during cold start?

Asked by Dec 29, 2012 at 12:49 PM about the Ford Crown Victoria

Question type: Maintenance & Repair

car starts and runs up to high idle , then drops down and dies, it does this abouy four times then runs okay?

2 Answers

I didn't think they were part of the cold start circuit, thanks for confirming.

99,105

The car is in a open loop condition when it first starts. It takes about 15-30 seconds to get warm enough to go into the closed loop condition where the O2 sensors control the fuel flow.

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