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chinese 3.3 bar duramax map sensor

 
Old 07-25-2016, 11:55 PM
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Default chinese 3.3 bar duramax map sensor

anyone had any luck with these?

google gives me all sorts of values for calibration

i tried a bunch of them and still can't get 101kpa at Key On Engine Off

I should toss this thing and use the one denmah uses huh?
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Old 07-28-2016, 07:35 PM
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update, it was scaled correctly I had miswired it when I cut the harness up.

Still pig rich though. anyone wanna take a look at my tune?
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Old 07-28-2016, 11:17 PM
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got it to fire and got a log if anyone wanna take a peek.

it bogs and dies when you try and drop it into gear or if you blip the throttle it dies on its way back down to idle rpm.
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File Type: hpl
running weak.hpl (144.2 KB, 7 views)
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Old 07-29-2016, 05:22 PM
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got it to idle without over fueling and even drop into gear without dying.

had to up the iac steps and add 20% to VE of the base tune
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Old 07-29-2016, 08:05 PM
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I wont tune anything with that sensor. Seen nothing but problems with them in the past. Have never seen one work correctly except in a duramax.
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Old 07-29-2016, 08:44 PM
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Yes, I keep reading that it lacks resolution at lower kpa...which makes some sense on a diesel engine.

What map sensor have you had the best luck with? I don't really need 3 bar...only going to 10 or so psi with this build.
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Old 07-31-2016, 03:16 PM
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so my advice is don't use the cheap $30 version of this sensor. buy the delphi one if you are gonna use it.

I was getting all sorts of funky readings at idle with it, and it would never go above 100kpa while my boost gauge was saying a couple psi...so I decided to set up a test rig with a airbrush pressure regulator set to ~5psi

the result





I switched to the more common GM 12223861 sensor and it scaled nicely. solid 100kpa at KOnEOff and around 45-50kpa at idle.
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