BHW engine swap crank no start

[HEEP YJ]

Hello, i just got the vcds yesterday to help troubleshoot a no start, so please bear with me. The vehicle in question is a jeep yj, with a bhw from an 04 passat. The ecu has had the standalone deletes done, so no immobilizer, no MAF, no asv, as well as a malone stage 2 tune and manual swap tune. My autoscan shows no faults. The swap has been running fine for a few months, until one day it wouldnt start. I have gone over the wiring multiple times, and all seems good. I rechecked the timing with the timing tools, and it is good. I was able to start it with a gas soaked rag at the intake, with no problem. Fuel has been proven up to the p.d. pump, with good flow. I have not been able to see the injectors try to fire. At the plug to the head, i had a scope on as the engine was cranking, and wouldnt get a signal on any pin. in vcds I was watching the injector solenoid values, and they would not change when trended. So I am not sure where to go next, and was hoping for some guidance. Thank you for your time.

Wednesday,18,September,2024,06:07:42:02792
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64
VCDS Version: 24.7.0.0 (x64) HEX-V2 CB: 0.4643.5
Data version: 20240715 DS356.3
www.Ross-Tech.com


VIN: XXXXXXXXXXXXXXXXX License Plate:


Chassis Type: XX (3B - VW Passat B5 (1997 > 2005))
Scan: 01 02 03 08 15 16 17 19 35 36 37 46 47 55 56 57 58 75 76 77


VIN: XXXXXXXXXXXXXXXXX
-------------------------------------------------------------------------------
Address 01: Engine Labels: 038-906-016-BHW.lbl
Part No SW: 038 997 016 N HW: 028 101 143 3
Component: R4 2,0L EDC G000SG 1388
Revision: 12345678 Serial number: XXXXXXXXXXXXXX
Coding: 0150032
Shop #: WSC 04356 000 00000
VCID: 29082586C5E98CC228D-5160
VINID: A28A28A28A28A28A28A28A28A0617BF560

No fault code found.
Readiness: 0 0 1 1 X

End----(Elapsed Time: 05:24, VBatt start/end: 12.3V/12.3V. VIgn 0.0V)------

 

[Uwe]

I don't know a whole lot about PD engines (never had one), but one thing I suggest you do is to make a custom Auto-Scan entry for VCDS that only has 01-Engine in it so VCDS doesn't waste five minutes of your time trying to find a dozen and a half control modules that don't exist in your car.

Perhaps @Jef might have some ideas here. He and his wife used to have two PDs, and I think he might still have one of them?

-Uwe-

 

[Jef]

While not common, the tandem pump can fail and cause a crank/no fire issue. However, testing of the tandem pump is done with the engine running at 4000 RPMs and you should have >7.5 BAR at the test port... so yeah, kind of hard to test a possible failure if said failure prevents step 1 of testing... fire up engine.

Pump/injector testing really boils down to making sure wiring harness is good.

Now if this is a failed ECM, then the only test I could suggest is to get a known good ECM. Plug it up to see if it allows the engine to fire.