chinese 3.3 bar duramax map sensor

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Jul 25, 2016 | 11:55 PM

truckdoug

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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?

Jul 28, 2016 | 07:35 PM

truckdoug

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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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denmah6.0 base tune scaled for 5.3.hpt (232.0 KB, 56 views)

Jul 28, 2016 | 11:17 PM

truckdoug

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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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running weak.hpl (144.2 KB, 48 views)

Jul 29, 2016 | 05:22 PM

truckdoug

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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

Jul 29, 2016 | 08:05 PM

LSX Power Tuning

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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.

Jul 29, 2016 | 08:44 PM

truckdoug

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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.

Jul 31, 2016 | 03:16 PM

truckdoug

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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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