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Problem when detune MAF

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Problem when detune MAF

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Old

Sep 28, 2020 | 01:37 PM

#1

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Problem when detune MAF

Hello,

I have this swaped gen 3 P59 engine stg2 cammed with NO maf, no O2 at all. With some tweeks to the tune this engine starts and idle just fine at 900. Now to the problem, If I set maf failure frequenzy to 0, engine will start fine, but idle like 400 rpm 3-5 s then die. I tried some different fuel settings and got the engine to loop like crazy for maybe 10s then die.
any thoughts?

Old

Sep 28, 2020 | 01:40 PM

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You need to be tuning the VE table when you disable the MAF to get the AFR correct. All fuel trims must also be disabled.

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Sep 28, 2020 | 01:46 PM

#3

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Quote:

Originally Posted by ddnspider

You need to be tuning the VE table when you disable the MAF to get the AFR correct. All fuel trims must also be disabled.

I have disabled closed loop, stft, ltft, I also have connected wideband.
how do I disable all idle adaptives?

I'd like to know why the emgine runs so good without the fysical sensors, but when I fail them in tune engine runs like crap?

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Sep 28, 2020 | 02:11 PM

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Its running like crap because you failed the MAF and don't have a tuned VE table.

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Sep 29, 2020 | 10:49 PM

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From: Iowa

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If you’ve got a wideband I can help you out

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