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Discussion Starter #1
When the weather is below like 35 or so, in the morning when starting the car, after about 2-5 seconds of starting, there's a very loud popping / click sound (just once), coming from somewhere in the hood and from exhaust it seems.
What can this be ?
 

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WAG...turbos.
How does it run? Any warning lights/messages? Have you scanned it for codes (light doesn't have to be on for there to be codes)?

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Certifiable BMW Whackjob!
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Uh-oh...do a search on the HPFP (high pressure fuel pump). Don't freak out yet though, it may be something else.

BTW...you didn't post the model/year.

sent from the future using the bimmerfest app embedded in my neural implant
 

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Discussion Starter #6
also still getting 2AAF,
and also started having issues with start, almost every day especially in the mornings i have to try about 5-10 times for the car to start.
time to replace HPFP ?
 
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