Originally Posted by 2004bmwx53i (Post 1222680)

I removed the airintake manifold and all the attached components, to gain access to the starter. The nut was loose. I tightened the nut, while in there, replaced CCV and all the temperature sensors, 3 in total. Put everything back together. Now the car cranks but won't start.....

Originally Posted by killcrap (Post 1222702)

but did you check the E-box Fuses???

Originally Posted by 80stech (Post 1222696)

Good catch on the starter solenoid nut. I actually did a post about that issue and you can tighten that nut from the bottom without doing all the work you went through.

If you want to measure voltage to the injectors then a multimeter would be a better way.

"Fuel in the rail" doesn't tell you much if you don't know the pressure.

If you disconnected the battery then there is a lot less chance that the issue is a fuse and more so that you forgot or disturbed a connection while you where doing the work.

You could try disconnecting the battery leave it for 20 mins. or so and
reconnect again.

(I didn't see your post about checking the voltage at the injectors with the DVM. You have 12v so the the problem is not that. The neg side is controlled by the DME.)

Originally Posted by Henn28 (Post 1222695)

Maybe pull the harness plug from the DME and see if it needs to be cleaned. I just added a subwoofer and when I pulled the plug from the OE amp to splice into the trigger wire I found lots of corrosion at the harness plug-amp connection. Perhaps if there is corrosion when doing the work the harness moved enough to break the connection in spots. I got a small amount of oil in my engine harness plug which migrated to the DME connectors and were causing some very odd problems after my motor swap. Not my finest hour.

Be careful if you do need to clean it though, I bent a couple pins on the amp when he were painful to straighten out again.

Originally Posted by killcrap (Post 1222705)

The E-Box houses the Engine Computer, Transmission Computer, relays and fuses for most of the the engine management.

Originally Posted by workingonit (Post 1222703)

I'm new to the BMW game, and have not had to delve into the injectors, CCV, intake manifold or much on top of the engine (thankfully), and your problem makes me reticent to do so, in the future. I watch YouTube videos about anything BMW, just to see wahat lies ahead, good or bad.

Almost two months ago, I saw a Pine Hollow Auto Diagnostics video https://youtu.be/7KyMZNHfvzk, concerning another BMW crank, no-start situation. It concluded with the diagnosis that the injector ground was left loose/off by the dealer when they worked on it, and the indy diagnostician (Ivan) and his mentor concluded that the injector drivers in the DME got fried.

I haven't watched the video again, but reading this thread made me think of it. Good luck fixing your problem.

Originally Posted by 80stech (Post 1222711)

You are getting side tracked with the injectors and your scanner, the thread title should be "no start after work done" Triple check all your work especially any ground connections and the the junction by the throttle body.

Originally Posted by 2004bmwx53i (Post 1222715)

Thanks for your input. Things evolved during this conversation. So the title is no longer valid. Can I change it for future users?

I've already ripped through the airintake manifold. Apart from the main body grounds, I'm not sure if any other ground exists. If there are, would you please share it with me. Thanks