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Is "pressurizing the system and reprogramming the PCM" something different than cycling the key 6 times after replacing the fuel filters? Asking for a friend.
 

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I am thinking that you assume that cycling the ignition during the programming procedure will turn on the fuel pump. Yes, that does happen but not necessarily enough to full purge the air. Is that what you are getting at?
 

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cycling the key 6 times after replacing the fuel filters
I'd go even further to say cycle until there is the least amount of fuel pump noise. I've done my share of filter changes finding 10-12 key cycles get MORE air out, which makes the least amount of noise after filter changes.
 

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I'd go even further to say cycle until there is the least amount of fuel pump noise. I've done my share of filter changes finding 10-12 key cycles get MORE air out, which makes the least amount of noise after filter changes.
If you stop after 3-4 and wait 5 minutes to let the tiny bubbles formed by the pump settle into larger bubbles, then a couple more the air passes faster.
 
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