FW 1.4.1 Limp Mode Boost Cut not working

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FW 1.4.1 Limp Mode Boost Cut not working

Postby DNMakinson » Mon Nov 06, 2017 4:20 pm

I have simulated a method of a switch input to engage Limp Mode.

I don't have EGT, but have an input set up as EGT. Then when the Temp is out of range (due to me changing the voltage of the input) CEL is thrown, and Limp Mode is engaged. Thus far, I have only simulated this with an open input ADC13.

This is my actual problem: Limp Mode is indeed entered, and the "Limp mode" indicator lights in TS. The EBC is properly set to output "0", the Rev Limit operates correctly, BUT the Limp Boost Limit (kPa) is not operating (no fuel cut at 105kPa).

So, the basic issue is that the Limp Mode Boost Limit is not working. Any way to fix this?

I can take a log, if that would be helpful. Please tell me what you would like to see. MSQ is attached.
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Re: FW 1.4.1 Limp Mode Boost Cut not working

Postby DNMakinson » Tue Nov 07, 2017 4:03 pm

Attached is a log made when CLT out of range set limp mode.

Note that Boost Target is 102 (no EBC), at WOT, Boost goes to wastegate of 150 kPa, but the Limp mode Boost limit is set at 105kPa, No cut occurs.

Is this a known bug in the limp mode? Is there a work-around I can put into the code?

DNM
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Re: FW 1.4.1 Limp Mode Boost Cut not working

Postby 64bit » Wed Nov 15, 2017 6:30 am

Why are you still using such an old version of firmware?
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Re: FW 1.4.1 Limp Mode Boost Cut not working

Postby DNMakinson » Thu Nov 23, 2017 7:58 am

64bit wrote:Why are you still using such an old version of firmware?


Why should I believe that 1.5.1 has fixed this bug?

1.4.1 is generally a great build, and 1.5.1 does not address any features I desire.

Do you have evidence that boost protection is indeed properly activated in limp mode in 1.5.1?
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Re: FW 1.4.1 Limp Mode Boost Cut not working

Postby 64bit » Thu Nov 23, 2017 8:02 am

Let's put it this way.

They probably aren't going to update an old firmware.

So, update. And if it's still an issue... Submit a bug report for the new firmware.


Crazy idea, huh?
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