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  #1  
Old 05-23-2020, 12:01 AM
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No start after transmission repairs..

Rebuilt the transmission (ZF5HP24) and after installation, my car cranks but does not start (battery ran out of power eventually). I can also smell fuel but not sure how transmission installation would cause engine flooding..


Any help would be very appreciated..


Thanks,


Ozzie
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Old 05-23-2020, 01:02 AM
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Check, check and recheck all the wiring you have touched and might have been affected by the trans work/install including what might have been pinched or damaged with the engine movement. I am assuming you disconnected the battery?
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Old 05-23-2020, 01:32 AM
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Quote:
Originally Posted by 80stech View Post
Check, check and recheck all the wiring you have touched and might have been affected by the trans work/install including what might have been pinched or damaged with the engine movement. I am assuming you disconnected the battery?

Unfortunately I did not disconnect the battery. Another thing I just remembered (sorry I am tired of al the work I had to do on the car for two weeks) is I also did an oil change and I may have spilled a little around fill up area..


I checked and there are no error codes..


Thanks,


Ozzie
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Old 05-23-2020, 02:55 AM
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Maybe try disconnecting the battery for a while and/or touch the positive cable(disconnected) to ground and then reconnect to reset everything.
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Old 05-23-2020, 03:39 AM
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Dealing with similar on wife's X5.

Acted like fuel pump not working and when I put in the new one it took about 7 cranks of 10 seconds before the first sputter. About 10-12 8-10sec cranks it started and ran fine.

Thinking EWS out of sync with key I pulled up the module in foxwell to sync the key and it may have been part of the problem. It tells you to crank the car and "did it start" = no. After I did that I got a little bit of attempt to chchchugges and 3-4 more cranks it started.

My understanding is that if ews not synced, you get no spark or fuel.

Put some lacquer thinner in a puddle in the intake post MAF or off can't find use some starting fluid. If you can pull a vacuum hose at the intake boot that's a perfect way to get into the intake without removing anything.

If it fires up for a few seconds you have spark means EWS not likely the problem. Get or rent a fuel pressure tester and test the pressure.
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Old 05-23-2020, 07:42 PM
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Originally Posted by andrewwynn View Post
Dealing with similar on wife's X5.

Acted like fuel pump not working and when I put in the new one it took about 7 cranks of 10 seconds before the first sputter. About 10-12 8-10sec cranks it started and ran fine.

Thinking EWS out of sync with key I pulled up the module in foxwell to sync the key and it may have been part of the problem. It tells you to crank the car and "did it start" = no. After I did that I got a little bit of attempt to chchchugges and 3-4 more cranks it started.

My understanding is that if ews not synced, you get no spark or fuel.

Put some lacquer thinner in a puddle in the intake post MAF or off can't find use some starting fluid. If you can pull a vacuum hose at the intake boot that's a perfect way to get into the intake without removing anything.

If it fires up for a few seconds you have spark means EWS not likely the problem. Get or rent a fuel pressure tester and test the pressure.

It started today but sounded horrible so I turned it off. Left side of the engine (1-2-3-4 cylinders) all had misfire errors. I was tired of messing with it so I left it with the mechanic. I am suspecting a camshaft sensor problem or something right now..


Thanks for all the responses..


Ozzie
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Old 05-24-2020, 11:19 AM
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Originally Posted by turquise1 View Post
It started today but sounded horrible so I turned it off. Left side of the engine (1-2-3-4 cylinders) all had misfire errors. I was tired of messing with it so I left it with the mechanic. I am suspecting a camshaft sensor problem or something right now..

Thanks for all the responses..

Ozzie

After some research last night, every symptom the car has points out to the crankshaft sensor (located on transmission) including rough / no start, sounds like timing is off and the shifter gets stuck in one gear. The car will be at mechanic until tuesday. I wish I could get to it and replace the darn thing to see what happens..


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Ozzie
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Old 05-28-2020, 02:59 PM
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Originally Posted by turquise1 View Post
After some research last night, every symptom the car has points out to the crankshaft sensor (located on transmission) including rough / no start, sounds like timing is off and the shifter gets stuck in one gear. The car will be at mechanic until tuesday. I wish I could get to it and replace the darn thing to see what happens..

Cheers,

Ozzie
Quick update :

I got an A2 - Crankshaft/Camshaft position correlation, Cyl #5-8 error and multiple cylinder misfires (1-2-3-4) as well.

I have replaced both Crankshaft sensor and Camshaft sensor. Car quickly started, kinda sounded a little better but died again. I am wondering if I did anything wrong during the installation of transmission which broke the alignment of the reluctor wheel with the crankshaft sensor. Is that possible?


Here is a photo of what it looks like without the crankshaft sensor..



Any ideas would be very appreciated..

Cheers,

Ozzie
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Old 05-28-2020, 03:11 PM
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Shouldn’t matter regards alignment in regards to rotation. But the “teeth” on the wheel should be directly inline with the end of the sensor. Did you remove the wheel at all? Also have you ensured that the sensor is the same depth/length as the one that you removed? As Too much distance to the wheel would give a reduced signal return.

Did you wipe the codes from the module before attempting a restart? Just depending on fault code the vehicle could start up thinking something is wrong If a legacy code is still stored.

Regards to the misfire codes are all the plugs/coils fitted fully and the coil connectors in place? Sounds Noddy but worth a check, maybe something took a knock?

Theoretically the ZF transmission other than the Park/neutral safety circuit should have no bearing on the engine starting..... unless something hugely mechanical was wrong.... but in those cases I don’t think the engine would even turn over.
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Old 05-28-2020, 03:13 PM
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Maybe someone with access to DIS may be able to look up the procedure for changing the crank and cam sensors?

Knowing BMW it probably has some convoluted calibration procedure that needs doing!
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