M50NV injectors not grounding

[Styleprojekt]

EDIT: Latest as of 07/01/13


Issue: Injectors are not getting grounded, CPS does not read RPMS on diagnostic tool. .

I checked for continuity to the Crank position sensor and its good.
Car cranks hard.
Park neutral safety switched properly jumped (hence cranking)
Checked continuity to DME from injectors.
I can manually ground Injectors an they click
I am getting fuel all the way to the injectors
I have spark
BMW Diagnostic tool is not reading RPMS (yet im getting spark??)
Tried 3 different 402 red label, 1 402 silber label.
Swapped 2 harnesses, one from a Auto 525i 92, second from a 92 525i manual
tried 3 differnet Crank position sensors, 1 brand new from BMW directly, NONE read a mothereffin signal. All check out perfect OHMS


History:
Like an idiot I first of all bought the motor in pieces in boxes, it took me months to figure everything out, source the last bit of missing hoses, clips, sensors, brackets etc etc...it was a nightmare.

On top of that, my E30 hasn't ran in close to 2 years because I once again like an idiot, did everything at once (respray, manual swap, dash swap, shaved engine bay) then left the project untouched for 1 year or so. Ive spent weeks now trying to really focus in on the project and get everything tied up correctly, and I am pretty sure majority of things are exactly where they belong.

Any Ideas what the hell is going on and why the CPS is not reading? It cant be that everything is bad.

Harness adapter has been checked, double and triple checked by 5 different sources.

-89 325i
-Getrag 260 swap
-E34 Wiring Harness
-92 M50NV


Can something on the car be causing the engine not to fire? Can something under the dash (i did dash swap) not have been re-connected properly? Can something have been fried keeping engine from running?

[amcink]

Did you checked both fuel pumps?
What DME you are using?

[jp_slick]

I had the same issue. My engine sat for about 2 years. I had bad ckp and all of my injectors were bad. changed both, fired right up.

[Styleprojekt]

413 Red DME

All new injectors and spark plugs. Were able to jump the fuel pump with a probe and it buzzes so it technically will "work" to a certain degree when power actually gets to it.
Just realized I dont have spark either.
There IS power to the DME

[e30austin]

Yeah, that screams CPS to me. Needs to ohm out within 10% of 565 ohms. Probe it and report back.

I have spoken. Good day, sir.

[amcink]

413 Red DME

All new injectors and spark plugs. Were able to jump the fuel pump with a probe and it buzzes so it technically will "work" to a certain degree when power actually gets to it.
Just realized I dont have spark either.
There IS power to the DME

CPS is a good hint! But the DME you are using 413 is for a vanos engine. You need a 402 or 403 i think 405 works also

[tazer]

Nico I wish you would have told me more about the problems you were looking at.

I am going to do almost the exact same swap as you.... HA

The M50NV uses a Inductive Pickup CPS. M50tu (your harness and ecu) uses a hall effect CPS. These one will not work with the other. so if you are using the NV CPS that is most likely the reason for no power to the fuel pump.

Question: Did you buy knock sensors to go with the TU harness?

[Cyrix2k]

Nico I wish you would have told me more about the problems you were looking at.

I am going to do almost the exact same swap as you.... HA

The M50NV uses a Inductive Pickup CPS. M50tu (your harness and ecu) uses a hall effect CPS. These one will not work with the other. so if you are using the NV CPS that is most likely the reason for no power to the fuel pump.

Question: Did you buy knock sensors to go with the TU harness?

Just to be clear, CPS as in CAM position sensor. The M50NV and M50TU CRANK sensors are identical. However, the harmonic balancers are different and the timing will be 120* off. You must match the harmonic balancer to the DME. I don't know if it will run without the cam sensor or not. The NV cam sensor is a VR and the TU is a hall effect - I don't think you can swap them without swapping cams either.

:edit: slight mistake. It will not run without the crank sensor for sure. It might run without the cam sensor.

[amcink]

Just to be clear, CPS as in CAM position sensor. The M50NV and M50TU CRANK sensors are identical. However, the harmonic balancers are different and the timing will be 120* off. You must match the harmonic balancer to the DME. I don't know if it will run without the crank sensor or not. The NV crank sensor is a VR and the TU is a hall effect - I don't think you can swap them without swapping cams either.

This is correct. I've converted a NV engine into a TU and I need the Harmonic balancer, CPS a 413 DME and a TU harness to make it fire (almost there)

I believe his problems is that he has the wrong DME (413 for Vanos), he needs one for Non vanos and the Non vanos harness. This is to start

[Styleprojekt]

I believe his problems is that he has the wrong DME (413 for Vanos), he needs one for Non vanos and the Non vanos harness. This is to start

Borrowed a 402 DME from a fellow member. Tried it last night and still didnt fire. Ill go through the checklist again and see if I get fuel, spark etc.

[Styleprojekt]

Tried again and cant figure whats going on. I can smell fuel bigtime out the exhaust....but I don't think its sparking. CPS checks out at 560OHMS
Whats keeping the ECU from deciding to fire?

[Cyrix2k]

Tried again and cant figure whats going on. I can smell fuel bigtime out the exhaust....but I don't think its sparking. CPS checks out at 560OHMS
Whats keeping the ECU from deciding to fire?

if you smell fuel, the ECU is reading the crank sensor/detecting RPMs. Sounds like your timing is off or your coils are not getting power.

[Styleprojekt]

Alright people, I have have an accurate list of whats working and what not. Spent a couple hours checking every piece on the setup and this is what I have:

402 DME
- Engine cranks
- Relays work
- Power to Fuse 11
- Fuel Pump works
- Spark: yes
- Correct OHMS and continuity to Crank and Cam PS
- Extra ground on engine AND DME
- Power to Injectors Yes
- Injectors firing NO

After spending quality time diagnosing everything last night, we determined that the fuel injectors are not firing (not grounding/pulsing). Everything else checks out good.

Now, this particular 402 DME wouldnt have EWS correct? It came out of a 92 325i. Also it came out of a running car.

ANY other ideas what could keep the injectors from firing? Were grabbing a couple DME's 402s/403s/405s from my friend's work and are going to experiment with them.
Im really hoping either the DME i used somehow went bad or has EWS and its an easy fix. Because I am out of ideas what could be keeping it from firing at this point.

[Styleprojekt]

UPDATE

Alright got some good news. Last night we messed around with a different ECU and all of a sudden the car did start and died after 3 seconds. We were not sure why but then hooked up the BMW diagnostic tool and realized the CPS is not sending a constant signal. When wiggling the wire around for the CPS, the tool would randomly read engine data then lose it again. Were assuming at this point the CPS is the issue and Im grabbing a new one after work today to try it again.

[Styleprojekt]

Alright party people, I am about as desperate as a man can get.
I had 2 different BMW techs look at the car and they could not figure out on the spot what is wrong with it.
I switched EVERYHING engine related. I got a manual 525i harness, silver label 402 DME, different Crank position sensor, different fuel rail, injectors and camshaft position sensor.
The Mothereffin car does the EXACT same thing...it cranks and cranks and will not start.

Idk what to do anymore, I am 100% out of options.
Is there anything on the car's side (the body) that can keep a car from running? There is fuel, there is spark, but the injectors wont ground.
I dont get it. I am about to tear that engine back out and drop an M20 back in.

How can a 2.7T swap into a B6 A4, and a newer 2.0T complete retrofit into a B5 be easier than this shit. WTF WTF WTF WTF WTF?????