@n52.ian: Could be a vacuum leak? #fyp #cars #mechanic #bmw #n52

n52.ian
n52.ian
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Region: NZ
Sunday 03 May 2026 23:40:53 GMT
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codey_massey987
Codey Massey :
Is it normal for it to rev up when I hit the brake in neutral
2026-06-22 19:13:38
5
c.i.supplies
🇨🇦Dynamic Euro Customs :
clean the MAF sensor first. start simple diagnostic first
2026-05-11 17:21:10
182
parkersawyer4
Parker :
Don’t listen to these comments. I’ve had my n52 for 3 years. It’s always done this while I’d idleing while warm. Never had a single engine failure or problem. And I’ve put 60k on it.
2026-05-13 19:28:37
326
x1vsxy
x1vsxy :
Sparkling plugs, ignition coils, maf sensor, o2 sensor and also vanos solenoids but mostly its first 2 that i said pretty cheap though
2026-05-12 22:03:02
91
e90henry
e90henry :
vanos solenoids or plugs&coils
2026-05-27 01:12:42
7
e.nastase
Emanuel Nastase :
I’ve replaced the lambda sensors, spark plugs, and ignition coils, but the problem remains. Tomorrow I'll remove the valve cover to replace the ECC sensor, and I'll let you know how it goes. N52B25
2026-05-22 08:34:44
5
yassine_hwass
yassine_hwass :
valvetronic sensor sometimes get oily and get damaged
2026-05-11 21:08:32
1
nick.oliver710
nick.oliver710 :
If it’s not a vacuum leak I’d smoke test to check then most likely the vanos solenoids and check valves (on the side) in between the headers and front of the engine and check the pcv but I’ve had this problem worse on a 200m mile n52 and the check valves were completely covered in gunk so I sprayed them with a full bottle of brake cleaner and it fixed it
2026-05-10 06:51:50
1
_18175
🫡 :
Could be a million different things. Vacuum leak, sensors, etc.
2026-05-10 11:47:32
5
vq_brayden
vq_brayden :
Idk my maxima does the same thing idk if its related but i think its cause of the battery or flow of electricity is disrupted or something like that
2026-05-04 00:44:36
2
no.fan.here
SwedeAsS60 :
check air aka the MAF, then check your sparks. very unlikely coils and fuel supply, because coils are obvious, they cause misfire, fuel will cause difficult starts and sluggish on load.
2026-05-12 13:17:57
0
_exodus_iv_
Brandon :
guys I had a similar issue. I replaced my camshaft position sensor and problem solved. its a cheap part and a easy DIY. also spray the MAF sensor with electric cleaner you will be sorted brother
2026-05-04 18:47:19
5
urgajajaj
GT :
guys this happens to me too on golf 4 and bigger dips even when im in neutral or when im driving in 1st gear
2026-05-13 08:16:39
0
torquemonstertdi
Hodzic.B8 :
Same happening with my Audi, and it does stall sometimes. But for me, it happens only when the car is warm. Idk what could be the issue. No fault codes.
2026-05-12 07:46:56
0
bobjeans618
bobjeans618 :
Get a Tesla
2026-05-13 18:27:30
0
harrison.wheatley
harrison :
could be a vacuum leak if recently replaced rocker cover gasket and other small seals
2026-05-13 02:16:14
1
theuns_e46
🇿🇦 06 CYL 🇳🇿 :
my M54 was doing the same but it was the Disa valve that was completely done rounded off and seals torn (I just got the car so wasnt from me)
2026-05-11 05:55:05
1
melmbomasolutions.co.za
Mel Mboma :
Key points: MAF and o2 Sensors.
2026-05-12 20:42:15
3
julians.gs300
julians.gs300 :
To anyone who can help. What causes a long start for these n52s. Ran rough so i changed spark plugs and ignition coils. And it idles n drives better. But the starting stills the same whether if it’s warm already or first start of the day. Ik a bad starter would just click/not even spin but it always cranks for a while. Max like 3 seconds. Kinda lost lol. I’m new to bmw any help’s really appreciated.
2026-06-19 23:11:12
0
john757sui
JM757 :
Guys I got a e90 328i I’m getting 10mpgs idk why, the engine and cabin gets hot real warm after a while I cleaned maf sensor mpg got slightly better but no more than 1 mpg increase and idk what to do
2026-06-08 20:15:40
0
19xlii_
jaxin :
I had it on mine I did new spark plugs/ coil packs , positions sensors, nee valve cover gaskets and maf sensors and it’s fixed now
2026-05-14 11:16:43
4
n52.fane
n52fane :
i have the same issues. obd scanner says that my lambda (or o2 sensors) are done and i have to replace them
2026-05-21 15:49:16
1
uglymx5
Uglymx5 :
I have this issue too but mines a lot worse and I’ve been told it could be my vvt solenoids
2026-05-13 05:47:52
0
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