[gazzess]

Can someone help. I'm struggling to see what's wrong and MHD are no help.
Car was on the Dyno.
Pulls to 3k revs and the throttle drops off for a few seconds and then pulls up again. 400 bhp it hit after.

Here is the log with throttle closing https://datazap.me/u/gary-peter/rece...og=0&data=3-21

Here is a time it worked https://datazap.me/u/gary-peter/didn...og=0&data=3-21

Only fault on the ecu is fan. I have race fans on it as it's a drift car.
MHD is trying to say it's stalling because it thinks it's not cooling itself.
Also they are saying it looks like it's going into limp mode but it's not.

Someone please help

[whyzee125]

They’re correct. You won’t run normally without the factory fan as the shadow codes relayed to the fan will cause reduced power.

[gazzess]

How can I bypass this now that I have aftermarket fans

[gazzess]

Originally Posted by whyzee125

They’re correct. You won’t run normally without the factory fan as the shadow codes relayed to the fan will cause reduced power.

Plugged in the fan and still the same issue

[suspect]

Originally Posted by gazzess

Plugged in the fan and still the same issue

Think your first log is private. So if you go WOT your engine just stalls at 3k rpm?

[gazzess]

Originally Posted by suspect

Think your first log is private. So if you go WOT your engine just stalls at 3k rpm?

I opened the log so you can see. Yes wide open throttle and at 3k revs the throttle drops off and then goes back up after a few seconds.

[suspect]

Originally Posted by gazzess

I opened the log so you can see. Yes wide open throttle and at 3k revs the throttle drops off and then goes back up after a few seconds.

In all these logs you have a 512 torque limiter active while the throttle is cut. I have never been able to find what these torque limiters mean except maybe 2048 has to do with shift bog. Is your traction control on? Are there any other codes? Have you got the stock fan connected correctly so its not throwing a fan code any more?

[TiAgAu]

Yeah well spotted suspect No idea what 512 limiter means either.


gazzess
Did you end up changing the diff? as in this thread you made https://www.e90post.com/forums/showthread.php?t=2100393

Manual? Auto? Do you have XHP? Scan for codes in the app see if anything weird.

[suspect]

Originally Posted by TiAgAu

Yeah well spotted suspect No idea what 512 limiter means either.


gazzess
Did you end up changing the diff? as in this thread you made https://www.e90post.com/forums/showthread.php?t=2100393

Manual? Auto? Do you have XHP? Scan for codes in the app see if anything weird.

In case 512 is traction control limiter it’s possible that the diff change is causing DME to detect wheel spin. MHD allows you to record gear. I don’t know if this is a MHD parameter or info from DME but as I understand there’s no gear sensor for manual transmission and the gear is calculated using wheel speed, which would be incorrect with different final ratio. So could be causing problems if manual transmission.