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      12-03-2018, 03:07 AM   #1
spikespiegel
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weird issue today

Was at the gas station, with 24 miles on estimated range, car all of a sudden coughs, and throws up an error like a transmission fault, car still moves but with a weird noise. I shut it off, fuel up, and restart. Cars fine, has a CEL. Check it out with a reader at home and found a few codes, System too lean in Bank 1/2, Fuel Rail pressure sensor (Pressure high before engine start).

I clear out the CEL via the reader and its all back to normal.

Was a SUPEr weird hiccup, I do have a BPM sport tune but its been flawless so far.

Coils/plugs are all done as of 5k miles ago.

Not sure if weather plays a part, but its probably the coldest i've driven the car in post tune. In touch with BPM and they suggested to wait and see what happens / if it happens again..

Any feedback appreciated if anyone has faced a similar issue..

PS car has bmc race air filters and thats the only mod besides the tune
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      12-03-2018, 07:13 AM   #2
BMWRog
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Are you not running the tank a bit low with only an estimated 24 miles left? I was advised not to run it down to the dregs because you're more likely to suck any residual crud that could be in the bottom. That applied to any car...
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      12-03-2018, 02:59 PM   #3
spikespiegel
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it was a bit low, i'll try to not do that again!! Not sure if that was the culprit, but it makes sense..
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      12-03-2018, 09:46 PM   #4
arucano
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when you get that low, you can loose suction on the fuel pump in a long turn or under braking or acceleration. That theory is supported by the low fuel rail pressure code. It can damage your fuel pump doing that.
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      12-04-2018, 01:42 AM   #5
spikespiegel
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Makes sense, I was however, crawling up on the costco gas station, at like 1mph when it happened...
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