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BMW Idle problem

Practical Standalone Tuning

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Hi,

I have the following setup:

BMW M52B28 engine with Jenvey ITB kit.

Engine management is ECUMASTER EMU Black.

Throttle bodies are adjusted and balanced correctly.

All adjustments were done with a fully warm engine, and the idle speed was set mechanically from the throttle bodies.

In EMU software:

  • Idle Valve Type = Disabled

  • In Idle Ignition Control:

    • Enable Ignition Control = enabled

    • Use correction table = enabled

  • In the Idle Target RPM table, the target is set to 1200 RPM at low temperatures and then drops to 950 RPM after 40 °C.

  • In the Idle Ignition Correction table I have values set, for example when RPM error is (-250 → +6°, -150 → +6°, etc.).

Now the problem:

When the engine is cold (around 10 °C), it barely starts and idle speed is only about 500 RPM. When I check the logs, Ignition Correction stays at 0 all the time, meaning no correction is applied at all.

Why does this happen, and what am I missing here?

Does it idle ok once it passes 40°?

I haven’t dared to try that large amount of ignition advance at all. But doesn’t idle ignition correction adjust it either?

I haven’t dared to try that large amount of ignition advance at all. But doesn’t idle ignition correction adjust it either?

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