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Old 04-19-2011, 10:03 PM   #1 (permalink)
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Default Have problems Wiring GM 3 BAR MAP SENSOR, PLEASE HELP!

I have been searching and searching and i still cant find my answer. I Recently bought a gm 3 bar map sensor. I am trying to find out how to wire it.

My questions that need to be answered.
1. Do you need a resistor box?
2. Does it matter if you wire it into a obd2 harness instead of a obd1
3. How do you wire it into a 96 civic, obd2a harness?
4. What settings will i need to change ? im using hondata s300


Please help a DSO member out!


Link of prove that i searched!
http://www.hondata.com/tech3barmap.html
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Old 04-19-2011, 11:37 PM   #2 (permalink)
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its easy there are only three wires. find out which one is the power, ground, and map signal. then tap. you do not need a resistor box, that is only for injectors if you are running peak/hold low impedance i think. You should have a setting in hondata to use a 3 bar.
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Old 04-20-2011, 06:12 AM   #3 (permalink)
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its easy there are only three wires. find out which one is the power, ground, and map signal. then tap. you do not need a resistor box, that is only for injectors if you are running peak/hold low impedance i think. You should have a setting in hondata to use a 3 bar.
thank you! do u know any write ups?
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Old 04-20-2011, 11:39 AM   #4 (permalink)
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DIY 3bar map sensor and resistor box adapter
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Old 04-20-2011, 03:23 PM   #5 (permalink)
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i already saw this link, thats why i made a thread asking if you need a resistor box to wire in a map sensor for obd2a harness
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Old 04-20-2011, 03:26 PM   #6 (permalink)
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Not sure if you got it, but here's another article...

Tech - 3 Bar MAP Install
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Old 04-20-2011, 03:41 PM   #7 (permalink)
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Not sure if you got it, but here's another article...

Tech - 3 Bar MAP Install
this is the link i posted LOL, since i have a obd2a with a z6 motor, which one should i do on the site, the b series or the rsx-s?
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Old 04-20-2011, 06:44 PM   #8 (permalink)
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I would just do the DIY 3bar map one. It is exactly how you need to wire it up. You can either cut and splice or you just make the adapter harness thats shown there. As this is the exact was I will be doing mine. That way if I ever swap to a pnp map sensor I dont have to splice the harness again.
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Old 04-21-2011, 08:46 AM   #9 (permalink)
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I would just do the DIY 3bar map one. It is exactly how you need to wire it up. You can either cut and splice or you just make the adapter harness thats shown there. As this is the exact was I will be doing mine. That way if I ever swap to a pnp map sensor I dont have to splice the harness again.
so u take a busted map sensor and u do everything in that DIY above. But do u leave your old tps on the throttle body and just have your Conversion 3 bar map sensor plugged into the harness?
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Old 04-21-2011, 09:27 AM   #10 (permalink)
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Hahaha, my bad. I didn't see that....at all.....
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Old 04-21-2011, 09:46 AM   #11 (permalink)
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Yeah and have to get a block off plate where the old map went on the TB or make one. can always use the bottom of the original map and seal the hole up in it to block off the map sensor hole.

If you drill the rivets out of the stock map it is a 2 piece case. The top and the bottom. Like in this pic from Xenocron.


Just take and fill the nipple with some sort of epoxy and put it back on and call it a day. You will have to either use shorter screws or a spacer. You can also plastic weld or epoxy a nipple to it so you can run a vacuum line from it to the new GM 3 bar.
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Old 04-21-2011, 07:54 PM   #12 (permalink)
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Originally Posted by WORPsol View Post
Yeah and have to get a block off plate where the old map went on the TB or make one. can always use the bottom of the original map and seal the hole up in it to block off the map sensor hole.

If you drill the rivets out of the stock map it is a 2 piece case. The top and the bottom. Like in this pic from Xenocron.


Just take and fill the nipple with some sort of epoxy and put it back on and call it a day. You will have to either use shorter screws or a spacer. You can also plastic weld or epoxy a nipple to it so you can run a vacuum line from it to the new GM 3 bar.
thank you sirrrrrr!!
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Old 04-21-2011, 08:54 PM   #13 (permalink)
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np at all man.
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Old 04-22-2011, 08:13 AM   #14 (permalink)
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Or you can run an adapter fitting on the stock MAP location and run a vac line to your remote-mounted GM 3bar, like what I did :


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Old 04-22-2011, 08:24 AM   #15 (permalink)
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Or you can run an adapter fitting on the stock MAP location and run a vac line to your remote-mounted GM 3bar, like what I did :


wow that is very impressive!
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Old 04-22-2011, 03:11 PM   #16 (permalink)
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Where did you find the adapter. I was also thinking about going that route.
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Old 04-22-2011, 03:32 PM   #17 (permalink)
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Where did you find the adapter. I was also thinking about going that route.
Lowes LOL
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Old 04-22-2011, 03:36 PM   #18 (permalink)
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What did you use for the plate?
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Old 04-22-2011, 03:41 PM   #19 (permalink)
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OR you can buy the adapter from LHT:

Scroll down to the MAP sensor adapter

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Old 04-22-2011, 06:26 PM   #20 (permalink)
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It was a Function7 adapter plate...made a while back, kinda rare
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