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67Dart273 said
I don't know about FAST, but most EFI systems should be able to start and run "open loop." My Holley certainly does, and so do the OEMs. I can tell when my Innovate comes online from the display.

Think about this..............you don't have to wait for "the tubes to warm up" on your modern car do ya?
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I'm a little confused by this one myself. All of the FI systems I've put together I will wait a few seconds for the fuel pump to build up the pressure, but I've never heard of waiting for the O2s to heat up. Also, isn't "open loop" and "closed loop" usually depend on engine temp?