sunnymore

Hello all,

I have a 2007 530xi on which the starter quit recently. I have replaced it successfully and put the car back together to notice it won't start. I received a transmission fault code then noticed one of the connectors under the intake was disconnected. Connected that back, the fault went away, the car would crank then and turn over and ultimately stalling immediately. I assumed it was a vacuum leak somewhere, removed the intake manifold again to notice two of the hoses from the crankcase vent system were broken probably during the starter installation. I replaced both the hoses, put new intake manifold gasket and checked all the connectors, now the car will long crank but won't turn over. It is not throwing any codes, if anyone has any insight on this please point me in the right direction. Thank you!

EDIT: The problem has been fixed, bought a new battery, changed the entire CCV system (hoses and valves), and all new spark plugs. The car has finally started and drove it today. Thank you all for your input and assistance!

donpb

Same exact thing happened to me after I replaced my starter. I found a cracked hose, replaced it and all was well.

If your issue happened after you replaced the starter, you may have broken more hoses or not re-connected something just right. I had the hardest time connecting the hose to the throttle body. It kept appearing to be on right, but it wasn't. I finally got it right.

sunnymore

Yeah, hopefully it's not another broken hose haha. Would you happen to know where I can find a layout or diagram of all the hoses to verify if I connected them all?

donpb

I did not just mean hoses, there's not that many to require a diagram. Re-check everything. I had to disconnect so much stuff on mine.

What reader are you using to check for codes? Often times, I will get no BMW DTCs but then switch to OBD2 and I'll have codes there. If your car won't turn over, you have to had thrown a code(s).

seanjordan20

+1. Just helped someone last night that had 4 codes on his reader had him hook up ISTA and he had 18 errors and it showed him what was really going on and why he had the issue he was having

sunnymore

I surprisingly didn't have to disconnect anything major, I was able to pull the intake back with most stuff still on it. The only things I remember removing were air box, filter, throttle body , power steering reservoir ( unbolted and moved out of the way), and just the rest of the accessories on top such as cabin filters and strut mount etc.

I have the creator C310 that I use to scan. I also tried to start it with the maf sensor connector disconnected to see if it would start, maybe the DME was compensating for the vacuum leak. Still had no luck.

sunnymore

Yeah, I may have to go the same route and try ISTA, hopefully I'll have some luck. It's been a while since I did it, what modules should I scan in your opinion?

seanjordan20

It will scan all the modules upon connecting to your car and give you a list of every error your it has. You can take a pic of the list and attach here for review if you get lost

sunnymore

Oh my bad, I think I confused it for INPA and NCS expert, those are the programs I have access to right now.

twh

If you didn't have to disconnect a lot to get he intake out of the way, you probably broke on or more of the hard plastic emissions/vacuum hoses. Some of those, if not connected, will cause the car to stall after starting. Getting the intake fully off is a minor PITA, but it just makes it so much easier to get done what needs to be done. It's also possible you messed up the crankshaft position sensor or wire. If you removed the sensor, possibly it isn't properly reseated. Maybe the + cable connection the starter is loose. Maybe the + jumper terminal is loose. Maybe the ground strap is done. Definitely go over everything again.