BMW 335i n55 2011 stalling on cold start, having to rev high rpm to fully start

LamineYamal · 10-17-2024, 06:03 PM

Hi, does anyone know why my 335i is stalling every time I start it? I’d have to rev it high rpm to actually start it. I changed the chargepipe and pvc pipe, so not sure. Ignition coils and spark plugs also done to it as well with downpipe and mhd tune. Got someone to diagnose it, but they can’t seem to find any major codes.

M-technik-3 · 10-18-2024, 04:18 AM

Going to need more information, car have a shadow codes? Your post is well to vague.

LamineYamal · 10-18-2024, 04:19 AM

Hi, yea I found a fix to it, I flashed the mhd tune back to stock, with mhd remain installed, maybe I flashed the tune wrong?

M-technik-3 · 10-18-2024, 01:28 PM

Car should start in open loop and warm up and then drop in idle once it reaches proper temps. You are going to have to post a data log that will help the far more experienced turbo guys give you proper feedback. I am still a rookie at turbo cars. I to have an 11 e90 with a n55

10-17-2024, 06:03 PM	#1
LamineYamal Registered 0 Rep 3 Posts Drives: bmw 335i 2011 n55 Join Date: Oct 2024 iTrader: (0)	BMW 335i n55 2011 stalling on cold start, having to rev high rpm to fully start Hi, does anyone know why my 335i is stalling every time I start it? I’d have to rev it high rpm to actually start it. I changed the chargepipe and pvc pipe, so not sure. Ignition coils and spark plugs also done to it as well with downpipe and mhd tune. Got someone to diagnose it, but they can’t seem to find any major codes. Last edited by LamineYamal; 10-17-2024 at 06:07 PM..
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10-18-2024, 04:18 AM	#2
M-technik-3 Lieutenant Colonel 2389 Rep 1,606 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]	Going to need more information, car have a shadow codes? Your post is well to vague.
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10-18-2024, 04:19 AM	#3
LamineYamal Registered 0 Rep 3 Posts Drives: bmw 335i 2011 n55 Join Date: Oct 2024 iTrader: (0)	Hi, yea I found a fix to it, I flashed the mhd tune back to stock, with mhd remain installed, maybe I flashed the tune wrong?
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10-18-2024, 01:28 PM	#4
M-technik-3 Lieutenant Colonel 2389 Rep 1,606 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]	Car should start in open loop and warm up and then drop in idle once it reaches proper temps. You are going to have to post a data log that will help the far more experienced turbo guys give you proper feedback. I am still a rookie at turbo cars. I to have an 11 e90 with a n55
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