M50b25 dosent revs over 3200rpm and exhaust temprature

[TobiasM50]

Hallo, 

My M50b28 NV Turbo dosent revs over 3200rpm and make weard noise. The exhaust temperature climbs up to 800C and the ecu says (max advance reached). 
Trigger 1 induktive Trigger 2 hall.

Thank you for your help

 

[Vaughan]

Attach a copy of your tune and a PCLog of the issue.

4 hours ago, TobiasM50 said:

max advance reached

The limit for this is determined in your ignition settings and the message just means that your tune is requesting more advance than the max value you have set.

4 hours ago, TobiasM50 said:

The offset here has to be set with a timing light and will differ between vehicles.

[TobiasM50]

Hello thanks for your answer.

I has done the timing with a timing light. 
I have read a bit here and I think I have the same problem as many other m50 drivers here that the zero crossing of the cam tooth is occurring very close to the reference tooth on the crank. 
My next step would be to set my trigger 2 setting to optical/hall, pullup off, rising edge,sync Mode cam pulse 1x

and add to the offset 360deg because i think i‘m firing in the exhaust stroke

Would that be a good idea to try?

[Vaughan]

23 hours ago, Vaughan said:

Attach a copy of your tune and a PCLog of the issue.

 

14 hours ago, TobiasM50 said:

I have read a bit here and I think I have the same problem as many other m50 drivers here that the zero crossing of the cam tooth is occurring very close to the reference tooth on the crank. 
My next step would be to set my trigger 2 setting to optical/hall, pullup off, rising edge,sync Mode cam pulse 1x

rising edge is definitely further from the gap in your pictured scope.

14 hours ago, TobiasM50 said:

and add to the offset 360deg because i think i‘m firing in the exhaust stroke

Engine won't run at all if you are firing 360deg out and are direct spark. If you are waste spark then 360 out will only affect injector timing  but not ignition timing (other than ind cyl ign trims ofc).

[TobiasM50]

Hallo,
I tried a lot of things before 
I report back here with new sensors, flashing the ignition again, reducing the ignition, adjusting the trigger arming, all without success

Here a Pc Log of some rpm an a new trigger scope at 3000rpm

Drehzahl neuer sensor kurbelwelle Log 2024-10-25 5;54;52 pm.llg 3000 Trigger Scope Log 2024-10-25 5;49;30 pm.llg

[Vaughan]

That log doesn't show any trigger errors or cuts. Why is the throttle only opening to ~8% instead of 100%, MAP is also only showing about 43kPa (~-57kPa MGP) so it looks like you are just not opening the throttle enough to go over 3500rpm, ignition timing of 25deg at this point doesn't seem unreasonable.

There are some odd oscillations in the Ignition angle in the first attempted at leaving idle but that just appears to be some weird setup in your ignition table.

Still want to see your tune file as it sounds like it has some weird values in it but it looks like your rpm issue is lack of throttle opening

[TobiasM50]

 

 

I tried to slowly get into the speed range as soon as I reached the speed there were misfires
but I also tried it with 100% opening but still the same problem and see trigger error 255 code

sorry here my tune file

File 26.10.24.pclr

[Adamw]

Your trigger offset at -106 seems weird for an M50, usually it is close to -84 for a non-vanos or -328 for a M50TU.   Do you have stock ignition coils with an ignitor, or changed to smart coils?

[TobiasM50]

No i have the NGK Audi R8 Coil.

[Adamw]

Are you connecting the timing light to an HT lead between the coil and spark plug?  I dont believe your offset is correct at -106, it will be like 20 deg retarded.  

[TobiasM50]

I did it bouth ways most the time with an HT because of power lose

[Adamw]

Your first picture is the correct method, except the arrow on the pickup should be pointing towards the spark plug. I dont think that direction would usually make any difference, but I think I would have another go and also confirm the TDC mark is correct by poking a screwdriver down the plug hole.  Im not sure about the M50 but I know on some of the earlier BMW engines the rim of the balancer could slip around on the hub so the timing marks were wrong, so just to confirm basics like that.

I have never seen an M50NV with an offset that is not close to -84 so Im sure there must be an error somewhere.   

[TobiasM50]

Ok, I have always relied on the marking on the vibration damper and have never checked the first cylinder with a dial indicator.
 I don't know if it matters but I drive a 2.8 liter crankshaft with M50 vibration damper, K1 connecting rod and Wieseco pistons

[TobiasM50]

Hello,

I tried out a lot again and checked my timing with tools and a dial gauge and all was fine.
Then I flashed the ignition again and noticed that my offset was somewhere else, this time at -112.
I don't understand how the offset can change so often.
I'm slowly starting to think that my vibration damper is broken and twists too much at speed, but it's fine when stationary.
What a friend noticed is that my speed signal and my engine speed rok are shaking a lot.

Thank you for your help and have a nice evening

Probe 3000 gas stöße.llg

[Adamw]

You could possibly paint a temporary mark on the inner pulley hub to check timing when running.