2nd MAP sensor for primary load?

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ChevelleFan
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2nd MAP sensor for primary load?

Post by ChevelleFan »

MS2/Extra 3.4.2, 3.57 board.

Is it possible to configure a 2nd MAP sensor on JS4/JS5 (with protective circuit shown in manual) and have it use that sensor as the primary map? My main goal is using the factory map sensor, don't really care about real-time baro. I couldn't see a way to configure it in Tunerstudio.

Thanks,

-Dave
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rickb794
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Re: 2nd MAP sensor for primary load?

Post by rickb794 »

If you don't need the second sensor, why not just disconnect the built in sensor and bring out the signal lead on one of the spares?
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
ChevelleFan
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Posts: 789
Joined: Sun May 02, 2004 5:55 pm
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Re: 2nd MAP sensor for primary load?

Post by ChevelleFan »

Mainly because it's a 3.57 board. I have the car running now with a hack-but-functional vacuum adapter where the old map sensor was, supplying a vacuum hose to the onboard map. I was just hoping to eliminate that.

-Dave
'70 Chevelle ZZ383/700r4/3.73 MS3X, 36-1, LS Coils, Holley Stealthram -- success story
'92 Saturn 1.9 DOHC/5sp, MS3, Champcar racer success story
'79 Malibu DartSHP400/80mm/PG/3.55, MS3X/36-1/LS Coils -- success story
Porsche 944 S2 3.0 -- MS3X/36-1/LS Coils, 1:44s Mid-Ohio, Pro Course
rickb794
Super MS/Extra'er
Posts: 6155
Joined: Sun Dec 21, 2008 10:28 am
Location: Portland OR

Re: 2nd MAP sensor for primary load?

Post by rickb794 »

I could not find a picture in the manual but I'm sure it's not a surface mount device.

You could even cut the pin close to the board to make it easy to unsolder the leg, leave enough to re-solder if you want to switch.

Also you need to think about whether the OEM sensor is supported, it may be problematic to calibrate.
Correctly identify your MS ecu here
Read the Do's and Don'ts to avoid the common pitfalls before starting your install or asking for help
Use only these manuals other manuals may cause brain damage or worse.
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