Half-filled engine light with no codes

60019113a · 02-28-2024, 06:42 PM

I have a 2009 335xi with 115,000 miles. I bought it from the previous owner with FBO. The car is very slow but there are no codes when I scan it. I've scanned it both with MHD and a BMW compatible scanner. The car has a rough idle as well. I was thinking it may be leaky injectors but I am relatively new to cars and don't want to spend $2k+ on new index 12s just for it not to be the issue. Any help is appreciated!

-in addition to FBO it has a oil block off plate+aftermarket oil cooler and an aftermarket oil catch can.

OMEGA412 · 02-29-2024, 04:04 PM

Are you leaving the engine running when you scan it?

M-technik-3 · 02-29-2024, 04:15 PM

Suggest you find some one with INPA or ISTA to give it a very thorough scan. Thego from there. You mentioned MHD you might do a datalog from there and the turbo guys can give you some better pointers.

I am too much of a rookie when it comes to turbos. My n55 is on factory tune.

60019113a · 02-29-2024, 06:56 PM

Quote:

Originally Posted by OMEGA412

Are you leaving the engine running when you scan it?

No I have the car in accessory mode. Should it be on?

60019113a · 02-29-2024, 06:57 PM

Quote:

Originally Posted by M-technik-3

Suggest you find some one with INPA or ISTA to give it a very thorough scan. Thego from there. You mentioned MHD you might do a datalog from there and the turbo guys can give you some better pointers.

I am too much of a rookie when it comes to turbos. My n55 is on factory tune.

Okay, I will do that. Thanks

OMEGA412 · 03-01-2024, 11:14 PM

Yeah car should be on or it could be clearing the code by itself, I had this happen with a boost leak. I would drive then get a check engine light, pull over shut my car off and check codes and have nothing. Then I tried the with the car on and it was stating a 30FF low boost

02-28-2024, 06:42 PM	#1
60019113a New Member 2 Rep 5 Posts Drives: 2009 BMW 335xi Join Date: Feb 2024 Location: Arizona iTrader: (0)	Half-filled engine light with no codes I have a 2009 335xi with 115,000 miles. I bought it from the previous owner with FBO. The car is very slow but there are no codes when I scan it. I've scanned it both with MHD and a BMW compatible scanner. The car has a rough idle as well. I was thinking it may be leaky injectors but I am relatively new to cars and don't want to spend $2k+ on new index 12s just for it not to be the issue. Any help is appreciated! -in addition to FBO it has a oil block off plate+aftermarket oil cooler and an aftermarket oil catch can.
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02-29-2024, 04:04 PM	#2
OMEGA412 Enlisted Member 9 Rep 49 Posts Drives: BMW 335i Coupe Join Date: Sep 2023 Location: California iTrader: (0)	Are you leaving the engine running when you scan it?
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02-29-2024, 04:15 PM	#3
M-technik-3 Major 2091 Rep 1,479 Posts Drives: E30 M3, E36 M3, 328iT, 335i Join Date: Mar 2020 Location: western Ma iTrader: (0) Garage List 1995 M3 [9.00] 2007 E91 [7.25] 1988 M3 [9.50]	Suggest you find some one with INPA or ISTA to give it a very thorough scan. Thego from there. You mentioned MHD you might do a datalog from there and the turbo guys can give you some better pointers. I am too much of a rookie when it comes to turbos. My n55 is on factory tune.
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03-01-2024, 11:14 PM	#6
OMEGA412 Enlisted Member 9 Rep 49 Posts Drives: BMW 335i Coupe Join Date: Sep 2023 Location: California iTrader: (0)	Yeah car should be on or it could be clearing the code by itself, I had this happen with a boost leak. I would drive then get a check engine light, pull over shut my car off and check codes and have nothing. Then I tried the with the car on and it was stating a 30FF low boost
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