N53 misfires

3RC4N · 03-14-2022, 04:30 AM

Hello together,

most of the misfire problems occur when the engine is cold or cold start.

But in my case, when the engine is cold, it runs almost perfectly!
But after 20 minutes and the engine has warmed up: Misfiring occurs on cylinder 3. The engine has a jerky power response, idling is jerky. It jerks when accelerating.
Problem still exist, when I restart the engine.
The next day, engine is cooled down, it runs perfectly again. When headed up, problem exists again.

I have renewed ignition coils and spark plugs -> nothing changed, problem still exists.

Replaced injector 3 with a replacement injector from a friend -> no change, problem still exists.

I sent injector 3 to a professional workshop -> no fault could be found with the injector, it was cleaned and the gaskets were renewed -> nothing changed, problem still exists.

I have the feeling that this car wants to screw me. Is my first BMW, always thought the problems are exaggerated. I'm about to set the car on fire.

PLEASE HELP!!!

Phil325i · 03-14-2022, 07:27 AM

Misfires can be many things. Best get your car's fault codes read, then you'll know what needs replacing.

03-14-2022, 04:30 AM	#1
3RC4N New Member 3 Rep 8 Posts Drives: BMW e92 N53 Join Date: Mar 2022 Location: Germany iTrader: (0)	N53 misfires Hello together, most of the misfire problems occur when the engine is cold or cold start. But in my case, when the engine is cold, it runs almost perfectly! But after 20 minutes and the engine has warmed up: Misfiring occurs on cylinder 3. The engine has a jerky power response, idling is jerky. It jerks when accelerating. Problem still exist, when I restart the engine. The next day, engine is cooled down, it runs perfectly again. When headed up, problem exists again. I have renewed ignition coils and spark plugs -> nothing changed, problem still exists. Replaced injector 3 with a replacement injector from a friend -> no change, problem still exists. I sent injector 3 to a professional workshop -> no fault could be found with the injector, it was cleaned and the gaskets were renewed -> nothing changed, problem still exists. I have the feeling that this car wants to screw me. Is my first BMW, always thought the problems are exaggerated. I'm about to set the car on fire. PLEASE HELP!!!
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03-14-2022, 07:27 AM	#2
Phil325i Brigadier General 706 Rep 3,315 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Misfires can be many things. Best get your car's fault codes read, then you'll know what needs replacing. __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace with cross bar; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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