BMW E90 CRANKS BUT NO START QUICK TIP
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- Опубликовано: 15 янв 2018
- Hey guys, I just wanted to share my experience with this 2007 BMW 328i 3.0 that would crank but not start. After verifying that engine timing was good, spark was strong, fuel pressure was strong and injection pulse was good, I found a faulty mass air flow sensor. Even though the DME or engine computer did not show any codes for the maf.
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Gone are the days of a true mechanic .... ur a dying breed my friend . Well done .
That's because no one wants to pay for diagnostic people think we just scan a code and it tells us what part to change. There's plenty of people who can do amazing diagnostics but they ain't gonna do it for $60-70k a year.
Well said. I do mobile diagnostics as a side gig. So many people when I say diagnostic fees are like don't you just plug in your zapper and it tells you whats wrong.
@@fuckjewtube69 70k is a lot of money
Bro, you're really a good mechanic. The big difference between a good one and bad mechanic is that a good one will takes his times to take on the challenges and analyses the problems and isolate it to figure it out to solve the issue.
For the most part it wouldn't be worth it. He spent 3 days on it and it was only a sensor. He probably only ended up charging the customer a few hundred dollars, which is a lot less than he makes in 3 days.
@@hausmeisterengineering5952 I think the most important thingbis knowledge, after nailong this one, everything will be smooth.
@@neolekota2331 sorry to just "jump in here", but I thought it would be appropriate to add something to your very poignant statement.
Knowledge is the key, and just as vital is how we acquire that knowledge. If we aren't proactive in our search and question it to be beyond question, its closer to fodder than knowledge.
Golden hawk vs Mt goat
@@hausmeisterengineering5952 doubt it was full 3 days
a guy that knows how to diagnosis a vehicle to find the cause of the problem has earned the name "TECHNICIAN"
Randomly found your video while looking how to fix my bmw, not the same problem I'm having, but thanks for posting and trying help us enthusiasts.
so what ended up being your issue
GOD BLESS YOU!!! Wishing for more mechanic like you here in the bay area .
I was thinking the same thing
Excellent work - your tenacious troubleshooting paid off - great tip for seized rings - lucky people in your area can access your quality services.
You’re a champ. I especially liked your breakdown of the lab scope graph in your Mini Cooper crank , no start case. Didn’t really help my own personal mini crank, no start issue but it’s nice becoming more informed. P.S. I had already known and checked the MAF possibility before seeing this today, but that wasn’t my issue either.
You nailed it guy.....cranked mine right up after unhooking the MAF. Well done !! Thx !!
ive seen sometimes it can even just be a relay too
Hey man, this a great information. You save my time to troubleshoot my friend’s car. It makes sense that the MAF Sensor is culprit even there’s no code because when I check the spark plugs, is too rich with fuel (like flood) and it can’t spark well. Since the MAF Sensor is Bad, it gives bad signal to the ECU and keeps on damping fuel into the injectors. 👍
Thanks! This didn't solve my 97 328i cranks but no start issue but I appreciate your posting this because everything helps and knowledge is power✌
I kinda forgot about unplugging mafs lol I remember doing that on the older gm 3.8s haven’t had a maf sensor no starts in a while, thanks for reminding me
You gotta be kidding me MAF! Wow thanks for sharing!
Well done, this video helped me tremendously. I searched you tube by symptoms and yours was the first. It is exactly the problem I have. Excellent troubleshooting!
Bro seriously thankyou, been searching for the problem for 2 days now and this was the issue all along, off to buy a new one now 😂
Nice work, thanks for taking the time to post it 👍
Great job, You never gave up, I wish I lived in your town.
This man is a true mechanic good job sir.
Wow You Rock Thank You For Sharing! I have been working on a 2002 252i having the same no start issue. I watched your video walked over to the car unplugged the MAF sensor and Bam!! She was alive!! God Bless Brother!
I have the same problem whit the 525i 2003??? But i dont know whats the problem?
Thanks, this video got me rolling before it even finished!! Thanks a lot man!
You are the best my daughter had broke down on the side of the road I went to pick her up and wait for the tow truck driver as I was waiting I seen your video I disconnected the mass airflow sensor and it started right up thank you
Just stumbled on this video because my 2007 bmw 328i also has an issue starting. It will crank but won't start. Thanks for the tip!
What a champion! Thanks for sharing this info!!
Eric,
I had the same issue with my E46, no codes indicated it was my mass air flow sensor. After I saw your video I checked out mine and sure enough it started right up after I unplugged it. I made sure I replaced it with a bmw part. I tried a cheap one and it threw all kinds of other sensors off and generated new codes. So stick with BMW brands. Thank you for this it saved me time and money.
Excellent video / in-depth analysis --- thank you for posting.
You always put some great videos vith great tip.
Thank you for sharing your experience. Great tip for the piston rings!
Eric, i miss you my friend!!!!! You are one heck of a mechanic!!!!
I’ve ran into this in a couple of fords. Good video.
Sweet find👍 You're the man!
Hi thank you so much for this vlog. I am having same problem in my car so I am going to follow your way and try to start my car today thank you once again,
Thank you for sharing this info. I’m having a similar issue with my 08 e90. I replaced the MAF like two weeks ago when I replaced a fuel ventilation breather valve that’s located under the throttle body. Fingers crossed 🤞🏽 this is my fix.
Thank u thank you thank you,,, for your effort to share this experience with us,,, I really appreciate this video and your initiative, we guys need to put up more n more videos like this,,, this is kind of help to the humanity and kind of a great great charity , one can save lots of bucks,
Thank you, may God bless you
This guy has a buddy that works at BMW and sends him the car to fix. Not a whole lot of confidence in his own tech's to find this problem especially with no codes in a reasonable amount of time. Sad, that dealer mechanics don't know squat on whats wrong with a car unless a code fault kicks him in the ass. Great job my friend. You are among the few good ones.
Newest subscriber, amazing patience and thoroughness; helped me out big time and provided some extra maintenance I've never heard of!!!
Thanks from SATX
Knowledge is power , thank you my friend
brother thank you for your vid I now know after spending slot of time on my 2006 BMW I finally seen your vid and max flow sensor being it you saved me a ton of money thank you!!! thank you for your help
At the dealer this could have been a several thousands of green. They would have opened and checked the timing And after finding it is okay, they would have also come up with a good explanation to claim the time and money from the poor owners. And they would have moved on to other things. I never take my car to dealers unless it is under warranty. I look for local mechanics like the one in this video.
The guy on this video did a great job. He only did what was necessary without jumping into costly conclusions (like the dealer wanted to do). I cannot imagine what the dealer would have said to the owner after discovering a low compression in one of the cylinders!!! OMG...
Mechanics like this guy are diminishing nowadays. I congratulate you man for your persistency, honesty and also coming here and sharing your experiences with us. Way to go...
Great video awesome keep up the good work
Chem-Dip Carb Cleaner in the gallon works really well for freeing sticky rings also. Pour it in the cylinder then take an air chuck with 25 psi and blow in the spark hole. Doing that forces the liquid all around the layers of rings. I did that on and off for a couple of days and it removed all the carbon.
Several shops and 3 days at yours and you finally decide to check the MAF….?! That’s one of the first things I always check.
This just saved my life I swear ! 🙏🏼 your the man !
from what i have gathered, if your BMW is cranking but not starting its either the MAF sensor or the possitive battery cable that has the little fuse thingy on it (my family has a bmw that is cranking and not starting after a crash), other than that keep it up man good vids and ur a good mechanic after all
Nice video bro. Very thorough.
This is why I subscribe to you. Brilliant detective work. Maf sensor fault. Lol.
This is a terrific tip. Thank you very much.
THANK YOU!!! Had this exact same issue and your solution fixed it! N55 355i
Issue started during winter cold starts. Cranks and gives up. Try again and car starts. A few weeks later, 3 tries and the car starts.. weeks later its 4.... two months after the issue started the car cranks and cranks with no start. Installed brand new battery, same issue.
Disconnected Mass Air Flow Sensor from intake and car started on first try
Turned car off, reconnected sensor, car started on first try
This tip saved me from towing the car to a shop for repairs. HUGE HELP!
If this issue comes back and persists I will replace the sensor
Binge watching your videos. You're a beast bro never stop making videos. Your content is gr8!
Thanks for the video, I wanted to ask you is the compression procedure g he same on this engine as any other?and do you know if there is another way to check timing without that fancy computer you have?
Engine management technology gets you everytime. Still love the BMW.
Very educating me..thanks for shared the video. Please share more on other issues pal. Lol
Thank God for this video! You saved me alot of money and heartache. My BMW 330i has been down for 2 days. I've been troubleshooting and this video hit the nail on the head! A $30 maf sensor and I'm good to go!
Thank you for the great explanation. I have a 328ix 2007 and the problem is similar. It starts but occasionally it won't start.
You are an angel in the problem I am facing the same problem on E90 in my garage I will try without MAF sensor tomorrow. Thanks
Wow I never thought about that thank you very helpful
I know this is an old video, but was the MAF pulling down the 5V reference, or was it just not reporting?
good diagnosis, and thanks for the tip
Dealing with a crank/no start problem this week on my 2010 Ford Expedition. Will try your tip. It's a great idea, whether it works for me or not, when you're faced with this issue but no DTCs, since the computer just substitutes an average value when the MAF is absent. Really appreciate your sharing your experience and the tip on using AC Delco Upper Engine and Fuel Injector Cleaner to restore compression to a weak cylinder with marginal piston rings.
Did that work for you?
@@renoleceesay7869fuel pump relay
Very informative thank you for sharing
Man that’s why I never take my 328i to the steelership. I do my own repairs and maintenance. Good job sir.
Good work mate did this on a job I just changed the engine wouldn’t start unplugged maf started straight up thanks heaps mate 🍺
It’s crazy that the BMW dealer doesn’t utilize a scope. Especially, since there are so many issues with the Vanos System. Being able to verify the cam/crank correlation alone is well worth the investment in training and equipment
ahh, so helpful! must know where your shop is at in Houston cause i'm from there. Would love for you to take a look at my car!
Very informative thanks 👍🏼
That's awesome.You helped someone out.
The MAF was causing our car e92 325d to randomly stall at low rpms whilst on the move, very dangerous. Eventually it stopped starting altogether. No error codes at all. What really annoys me is, ista's functional description says this is not possible, that a faulty MAF cant cause a non start grrr. When looking at the live MAF data the only indication of a possible issue was that if left over night the intake temp didn't match actual air temp, it was off by 8c. The nominal values and actual were actually pretty close otherwise. If in doubt disconnect it see if your symptoms disappear. However remember other things are disabled when you disconnect the MAF like egr, swirl flaps etc, so it doesn't necessarily mean its the MAF if your problems go away, readsistas functional descriptions to see how things are interlinked. If you do change MAF reset adaption and codes.
Thank you for that tip!!!
Thank you for sharing!
GOD BLESS YOU!!! GOOD LUCK!!! I had a W140 Mercedes with exactly the same issue, NO CODES, DEAD MAF, CRANK NO START
engine temprature sensor
so they wanted $1k to check for timing.. when its easily done with a scope in 2 hours or less... lmaoo good job Erik!
Thought that was odd
Even 2 hrs is overly generous...IMO
Maybe easier at the computer because of ckp access and would confirm circuit integrity leaving pin fit as the last piece to rule out
Not sure of the set up but maybe a shifted relucter has to be ruled out...anyways it was the MAF
wonder what the data pid read?
Good damn job man! That BMW could very well have been headed to the junkyard. Why haven't I seen your channel before.
Very informative thanks
Hey Eric, Thanks for sharing your three days of frustration with us. I have a 2006 525xi with a crank but no start issue myself. I parked it for 4 months in the garage, went to start it again, and all it would do is crank. I have fuel, I have spark, so I been chasing an answer. No codes at all. My best guess (at the time) was to replace the crankshaft position sensor, because it would almost fire and run for a half of second, from time to time. Of course the plastic crankcase ventilation hoses snapped like uncooked pasta, and I ended up replacing all of those hoses connected to the intake manifold that had to be removed to get to the sensor located under the starter. (BMW design genius) Afterwards I still had no start. Perfectly running car when I parked it. I'll have to try the MAF sensor tonight.
Robert Hirsch did you find your issue?
@@dbranconnier1977 did you figure it out?
@@hakimadams7226 Yes, had the exhaust and intake camshaft position sensors replaced and also inside the oil filter housing, there is a plastic cage/basket which holds the filter and connects to the filter cover which was loose/broken and caused issues with oil pressure/engine stalling at stops. Replaced it and no recurrence of issues since that time.
@@dbranconnier1977 thanks for the quick reply really appreciate it man
Great tips I like it
Excellent troubleshooting!
LEGEND! I just reassembled my tintop N52B30 in my E61 530i Touring after changing the valve cover gasket, CCV, plugs and both DISA valves and I had this no start condition. I was going out of my mind, no codes in INPA or ISTA, I had spark, plugs were wet so fuel was working, checked the fuel pump, rechecked my work, grounds, connectors, no loose hoses etc. I was just about to give up and get it towed to an indy and I found your video. For sure I will remember this tip for future reference. Interestingly enough, once the engine was warmed up, when i re-connected the MAF it fired right up, so i'll see if it starts tomorrow on a cold morning, if not i'll order up a new MAF sensor. THANK YOU SO MUCH FOR SHARING.
Awesome!
@@ADVANCEDLEVELAUTO Hey it's not much but i just paypal'd you 20 bucks, you deserve it, so have a beer on me and thanks again for the tip! ❤ 😎
Thank you very much! I really appreciate it.
@@ADVANCEDLEVELAUTO You're welcome 👍😊
ERIC, SUBSTITUTE BACK DATA ARE ALMOST TO FACTORY SPECIFICATION AND ARE SO HELPFUL LIKE IN THIS CASE STUDY. I AM VERY GLAD IT RESOLVE THE MALFUNCTION.
Awesome work bro, thanks for the tip 👍🏼. I bought my e90 used not sure if MAF has been replaced, will order it and do it this spring so i can keep track that its been replaced as maintenance and avoid this issue.
Thank you very much for your videos
Great tip. Wish you could scope the before and after of the sensor.
❤❤❤ that a nice trip bro you are good 😮😮😮
Bro, thank you thank you thank you for posting this.
Good Job sir, that’s a common problem on Bmw, most of times it’s happening like this after installing low cost parts, airmass flow sensor must be replaced with an oem one!
Sometimes we get thrown for a loop once in a while. Nice job sticking with it and working through the problem. You seem too stubborn to quit like myself. 😂 I’m the end it’s always worth it to save someone a lot of money and gain a customer for life even if you lose a little time on one occasionally.
THANK YOU BOOS I FEEL LIKE MOVING TO HOUSTON JUST FIR YOU AND TO LEARN THIS BEATIFUL CRAFT...YOU ARE AWESOME AND I WILL KEEP TGAT IN MIND...I M GOING TO GET A 2011328I XDRIVE THAT THEY SAID DOESN'T START...I WILL KEEP YOU POSTED.
MUCHO GRACIAS
Thanks for the tip
Thanks for ur knowledge on Bmw I have the same issues replaced the starter still no start 08 528xi I will check the mass airflow sensor
Thanks for the video. Is there any other way to check the timing without a lab scope ? It's a coil on plug system - can you add a plug wire to the #1 coil to connect a timing light and see how close to TDC it is when it fires ? Anything else on a scan tool ? I am a DIY who grew up with distributors and would put it on TDC and see where the rotor pointed . Any information on these newer vehicles is appreciated .
U just gave me good idea thank you!!!!!!!
Great job buddy thanks.
Could you please do a video on how you used the oscilloscope to verify timing was not incorrect?
He has great videos. I also want to add, ONLY use a OEM MAF sensor even though they are way more expensive. Don't ask me how I know this. I learned the hard way.
I got distracted you may have already checked for 5v reference, and I missed it , but anyway thumbs up Eric you are a insipiring guy, good luck to you and your family.
was the maf shorting the 5 volt reference? great vid thanks.
Great video!! I have the same problem now !
I find the same problem with my e90 320i. It has 67k miles on it. I would not start just cranks.. reduce engine power light came up. Any idea what is wrong with my car?
I don't know if your still answering posts I know it's old but, 07 328xi had fuel pump go out and melt the connecter from fpm to top of pump (found out it was from years of bumps the power wire and ground had rubbed the insulation off then they both touched top of pump lid and melted it lucky me😮) so I replaced pump and connector, it still is acting like there is no fuel, I checked there was fuel to the rail at first, then it stopped and I rechecked power to fpm and now it reads 3.5v I can't find any more shorts or anything, also changed both camshaft sensors and got a new crankshaft sensor but that one is harder to get to doing it in the morning, all if this to ask you if you thought what you ran into would be the issue here?
Going through this problem right now as we speak definitely will try this I have a 07 bmw 530I
Once you replaced the maf sensor was everything still fixed? Sorry just asking because it seems if it wouldn’t start and you remove the maf all it would be doing is changing the circuit back to the base fuel map in the ecu and possibly only masking a different issue such as another sensor by not monitoring the airflow live with the maf sensor to make the proper adjustments and basically causing the vehicle to idle up higher and allowing it to gain enough fuel to start and stay idle as the system would no longer be looking for its read outs. Sorry for the long questions but I have ran in to this same issue with these cars also and it always seems that disconnecting the maf sensor makes it appear to be corrected until a new one is installed (at a large cost) and sometimes the issue comes right back after a short period of time. I know the maf sensors can definitely go bad but I was just wondering if you had any more dealings with yours later or if it was the final issue for sure and if maybe you have a trick or technique for diagnosing this to know for certain it is the main issue? Thank you for any insight on this and sharing your experience with what you found because for many people this issue can certainly appear to quickly become a money pit if diagnosed improperly. Best regards.
Thanks for posting. What did the dealer say the issue was?
I had the same problem I kept trying to clean it and let it dry and put it back in would not work then my last resort was trying to start the car with it on while it was wet with mass air flow sensor cleaner and it finally worked and runs great I think that the coils heat up and with the wet mass air flow sensor cleaner spray on the coil sensor is burned off any residue and works flawlessly now so keep it in and spark the maf and have some one start the car while u hit it with the spray
Thanks for sharing👍