Great vid mate , similar problem with a Z4 downunder , when idling & you press the brake pedal, revs increases to around 1200 so spraying that pump with brake cleaner gave it the same increase in revs , so now I know what to replace .. cheers mate , your Vid helped me heaps. 👍

Here he is testing for leaks to find that one spot. If you plan on keeping your BMW (or any car for that matter), best to just change all rubber hoses (anything rubber, vacuum lines, fuel lines, even windshield seal, window belt moulding (and any external rubber especially if parked outside) after 10 years, especially the smaller ones. They simply all go bad over time as rubber decays with time. AND do not forget to change out BMW's CCV kit (if yours is equipped) every 10 years as well, if not done sooner.

Great that you found that leak. Looking forward to your next vid 👍🏼

Man I learn a lot from your videos. Thank you and keep them going!!

love the videos man! Super thorough.

Great video. I love the detailed explanations! Although I have a question now is it the overall total between short and long terms going up or down that will determine if it’s a vacuum leak or something else?

Just did a smoke test on my 04 325Ci that has a nagging P0171 & P0174 codes. The ONLY leak I found was at the Sucking Jet Pump (part# 11617503621) at the exact same location as in the video! Since I've found no other leaks and my MAF sensor checks out okay I'm gonna order the part and hopefully it fixes the codes so I can get it to pass emissions inspection. Great Video!

This KID ROCKS the REVS! THANKS BUDDY!

I'm wondering if you have any suggestions or clues as to why my catalytic monitor is "not ready " or possible causes for it not running, besides the drive cycle, because for sure that's not it. I've been told it could be an intake leak but have no idea how to check for that, by the way no CEL. But I did check the temp of the cats and one is running colder then the other. Any insights would be appreciated.

Great video as usual!

Great job!!! Please make a video of the fixing I have the same problem with mine. Thanks again.

I have a 1998 BMW 540i. Went for a smog test. My hydrocarbons were high at 15mph test. HC- Measured 58, max is 49 in California. HC 25mph test measured 20, max is 33 (pass). I'm only 9 away form passing on the 15mph test. No check engine lights or codes. Car runs very well. two years ago it passed both easily. Would a cat clean in the gas help at all? What do recommend. Great videos, clear and informative. California is so strict.

Check engine light came on, I took it to Autozone to get a read and they showed P0174 and also some secondary air pump code. I replaced a hose on the air pump that I knew was bad, and I inspected my disa valve o-ring. The disa valve was really easy to put back in; it didn't fight me at all. I ordered a new o-ring along with some new intake boots to go with. While waiting for the parts, my check engine light went away. I'll eventually replace that o-ring, but since the check engine light went away, I'm kind of unconcerned. My car is far from perfect. I'm just wondering why the check engine light would have gone away even though I didn't fix my vacuum leak.

Thanks for the plain English trims explanation

great work

Wow.. Im having the same issue with sensor 2 bank 2.. I replaced a brand new from the dealership and I'm still getting a p0056 code .. I definitely need to do a smoke test.. where exactly is that brake booster hose located.. 2003 bmw X5 4.4 .??

That is the vacuum booster hose and connects directly under the intake manifold in that exact center of the manifold. Literally right between cylinder 3 and 4 intake plenums. Why it only effects bank one has something to do with the firing order.

Great vid, thx!

Yo I'm going crazy right now trynna find my vacuum leak just replaced my ccv for no reason 😒 did a smoke test holds pressure no leaks same as you. but I'm getting P1520 cam sensor b actuator lean codee??? I also hear the dreaded hissing from the intake are tested the disa works as well . Idk what it could be going nuts here!

From your experience 50skid, how long does the e46 cars last? How many miles ? I have one that has 190k miles on it and I'm having this issue also where my rpms are bouncing and I have no power when flooring it. This issue began after a paid a shop to replace my ccv but I guess they did a bad job because I had a bunch of codes when I got the car back. I know I should've said something to the shop but I gave them the parts to do the job and they can just say I bought the wrong parts. Lastly, I have some of the same codes as you. Is it worth putting the time and money into fixing it ? If anybody has any input on this, feel free to comment.

Is this obd wifi or cable ?

Dont dismiss the hose under the manifold that connects to the brake valve aswell they get hard overtime and leak on the joins or clamps cause of improper sealing

Good Video. May I ask which flashlight you are using?

Sucking jet pump tend to broke into two pieces where it's has been glued from the factory, most probably this one is broken too and leaking. You can try to glue it instead of ordering new one because it seems like easy fix and cheaper.

Hi, I found my leak behind the maf,, the glove prevents you from seeing it. I sealed mine by placing wax from a toilet ring around the maf and putting the hose back on.

By the way great videos. And I have a 2000 328i... Ty

My O2 monitor is not ready for smog and I checked my live data with the scanner. It is showing both B1S2 and B2S2 in Voltage and jumping 4.5 to 9.0V, but my precat O2 B1S1 and B2S1 are in mV and slightly moving from -0.00 to 0.009 mV. Why my precat O2 are in mV not Volt. I also have error code P0174 only which is Blank 2 too lean. No vac leak found. And only O2 is not ready for smog. Please advice. Thanks

seriously good video

good job and thank u

Great video I have P2098 only , you think is air leak causes this code, please help

Interesting! Loving this series Jason.

Hey Not Sure if il get a reply im chasing code p0174 and p0171 lean bank 1 and 2 on my m54b30 done a smoke test should my disa valve have smoke coming from the lil hole were you put yoyr finger over to hold a vacuum to test the disa beat way i can describe leak

cool. now I want to do this on my car and see how it performs.

I've a bmw 2003 325 coupe how can I replace pcv valve? Maybe you can help on this please

Why I'm getting much fuel on the the throttle tube intake second tiny hose

*Same Part gives from VW. 113 901 Part Number. If this component is broken, it makes rpm fluctuations...*

Had a vacuum leak and watched this video, funny enough it’s the same exact leak. Did you ever figure out what it was called?

Hello, your long terms at half od video goes to 10% instantly, because Fuel corrections happens in so called cells. That is range in RPMs. Lets say 1st cell Is for idle, 2nd 1000-2000, 3rd 2000-4000 etc. Your corrections jumped to second cell as it was stored in freez frame. JUST fornsure, check RPM in freez frame. Each cell is re-learning independently. Am i correct here?

The usual figure for long and short fuel trim when added is 10% so as you say the bank 2 is over that at 12%. So it is already showing signs of a bank 2 issue too.

damn haha the sucking jet valve i just replaced that thing in my car 2 weeks ago yours ain't that bad cause on my car it was setting on both banks

I think maybe I have the same thing, I get PO171, but not PO174. Did you replace the sucking jet pump, or just the hoses connected to it? As far as I can tell, it is just a fancy tee fitting with some one-way air seals. Thanks, Rob

My idle is right above the 500 mark. The idle is smooth tho its a 320i 2001 is it normal? If i put it in drive the idle goes a bit lower

If that didn't fix it, change the DISA O ring. that what fixed mine.replacement I used was for water pump o ring from probe. it's like 5 dollars part at advance.

Looking at 16:16 it looks like the dipstick o-ring isn't fully seated. Might be the cause of the vacuum leak.

man i was wishing you had p1189 only... thats been kicking my ass for about 2 months. it comes and goes. (any help would be appreciated! lol) love your vids !

I have a problem when i turn my steering wheel rpm is droping???

damn no luck with brake boost line mine held vacuum pretty good

damn it, upload part 2! enquiring minds want to know!

Play the M54 Game - "chase the vacuum leaks until you've replaced literally every pipe and plug and seal on the inlet manifold"😁 I recently discovered that the 2.5 uses the same manifold as the 3.0, but has rubber plugs on the unused vacuum lines. Guess where I had a leak...

@50sKid When you try to diagnose vacuumleaks, you should always try to unhook the mass airflow sensor. i recently had a problem with my m54b30 where it sounded like it was only running on 3 cylinders but threw no codes, and after 2 hours of toubleshooting, when the bmw guy said we had to replace all sorts of valves, to fix all the vacuum leaks, i suggested we should unplug the mass airflow sensor, because after that the engine wouldn't run off these values. So if it is a vacuum leak, the engine should run with the exhaust gas values and actually run just fine. In the end i just had to replace the mass airflow sensor, which i had replaced only 8000 km earlier. but its always worth a try, because you can rule out all sorts of problems.

What if it’s only bank 2

Godthis same car w a vacuum leak so this is perfect

I started the engine with the glove on top 🤪👻🔨 it sucked the hose in and engine died .. so lucky i got clamp over it and it didn’t suck the glove all the way in the engine 👻 It’s common seance but I spent so much time to find the vacuum leak I didn’t think straight anymore 😜

Why not just use ISTA-D? ;)

im finna blow smoke in brake booster rn hold up 🤨