MembersPage/MarcelBMW_M50B25_Turbo (2020-02-12 11:49:47)

BMW M50 B25 Turbo

Early 2018 Purchased a Vems v3/15130 from Pieter, Vems V3 with lsu4.9, Sensors, and Wiring Harness and relays etc.

A friend mounted everything inside the car and connected it like it is shown on the Vems papers (electrician)

Please fill in

MembersPage/MarcelBMW_M50B25_Turbo/Wiring

In my case its a 1985 BMW E30 with a m50b25 Turbo Engine... (just for info)

April 2018 Pieter came to his Garage for the First Startup and Calibrate etc. Everything worked without any issues.

TODO:


Dyno Mapping was done 06/2018 and also worked pretty good with the ecu.

I Drove then for around 5000km with this ecu without any Problems.

TODO:

DB LOG REVIEW:


Problems start

2019 Januar 2019 I changed the Cam setting from the Engine and built in a Water Meth injection.

Dyno Mapping was done also in Januar. worked again good so far. Misfiring at End of the day above 1.8 Bar Boost.

TODO:

DB LOG REVIEW:


How do we know if it was good originally (just the problem didn't show up yet), or the problem was hiding for some time (and perhaps the first symptoms appearing right after the methanol install might be coincidence) - this can be tricky, need to review much detail (not much available so far, though), and review config with the setup + loom details known we really depend on useful info in MembersPage/MarcelBMW_M50B25_Turbo/Wiring

Tricky, because any wiring problem (or even some HV wire) might appear to cause problem after some time and possibly work for hundreds or thousands of hours before that;


Please take a log of the actual problem situation

In Email the problem was described as follows:

TODO:

Please provide vemslog of the follwing situations:

Please upload the logs to two new directories in your project root dir (/MarcelBMW_M50B25_Turbo) in the FileArea cleary starting the situation in the file name.

After receiving the logs i will review again and assist in pinpointing the problem. Thanks!

I posted two logs above this thread.

I dont get how to send this to the "project root dir".

This ecu in the new logs is btw the second ecu (sn17080) that Pieter send to me last year after the Problems shown up.


DB LOG REVIEW:

Checked that. Fuel pumps/ fan work when i use the (disconnected from vems) output cable and switch it to ground without problems when the Engine runs.

So that cant be a wiring problem from the relays or cables.

The output from the vems shuts the ground off

And then the relay shuts off the power to the fuel pump.

So, today i wanted to drive a small round after put in the vems again.

Checked of course again the things that are written above.

2 minutes the engine runned and then died.

So iam still at the point of knowing nothing.


Summary:

This is a pic from the wiring in the car

https://www.bilder-upload.eu/bild-bf374b-1579205711.jpg.html

ECU removed for the photo so we can see something.

Universal Harness is from Vems.

The wiring is always adapted for the actual install.

I listed here 2 log links.

The firsr one is with the running mapped engine and no Problems.

The second log link is with the Problem.

But i switched the relays manual for this day.


Is it possible, that EC36 receptacles got damaged during the install, or measurements (from DVM probe), and cannot provide reliable connections any longer ?