Quote:
Originally Posted by vincentimes.69
Hello. My '08 135i with 113,000mi recently started to take longer to start. Like 2-3 seconds cranking with rough starts. One time it took so long that the car stopped cranking and I had to press the start button again.
Carly app threw a code "2AAF fuel pump plausibility". BMW replaced the HPFP under warranty but 2 months later, issue came back. This time they diagnosed the LPFP (not under extended warranty). I replaced it myself and also replaced-recoded the battery. It lasted another month but issue came back.
I'm out of idea. I'm not sure what's next. Injectors? Fuel pressure regulator (if any)? Fuel filter?
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Yeah, classic fuel pump problem, not starter.
sorry.
The problem is that sometimes they replace the parts with bad the same bad parts. 2008 was early model and had the most failure prone ones. Supposedly they improved later. Check the part number they put in under warranty. for example, if they replaced it in 2008 or 2009 it might be the exact same bad version. You also have to be very careful when DIY because some parts places had the earlier version parts. They are legit OE but the older version. Long crank and rough start that then fixes itself after restarting is very likely fuel pump issue.
I would address the obvious first. Fuel injectors shouldn't cause long cranks, they cause noise, bad running but not usually long cranks.