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If I had to pick the most gain for the least electricity, it would be to heat the fuel lines and injectors. Fuel injection hasn't changed the fact that cold fuel on a cold engine doesn't want to vaporize fast enough.
I believe modern O2 sensors need only 30 seconds to warm up and start working. I wonder if leaving the key on for 30 seconds before starting would help with this?
Not sure if the engine computer, reading the engine coolant temp (ECT) will cooperate with fuel preheating.
Beside FE, there are major pollution issues on a cold start.
Last edited by jonr; 07-18-2008 at 09:35 AM..
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