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UTEC Map sensor- Malibu have question

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Old Nov 14, 2005 | 06:11 AM
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Question UTEC Map sensor- Malibu have question

Ok fellas, I may have a UTEC map sensor for sale if I cant use it anymore with my new setup. I am trying to find out if I can rewire it somehow to run my pump since it was disconnected from the UTEC. If I cant send me some PMs and I'll have your names. I'll have to buy another one unless someone has 1 to trade.

Malibu- Will this work if I some how can rewire it to something else? I need it to run the meth pump.
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Old Nov 14, 2005 | 01:22 PM
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I assume you have the GM 3bar sensor? Yes it should work if so. You will need to wire it to a +5 volt source and sensor ground source. The other wire (I think the green one) will go to the sensor input for whatever alchy kit you got.
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Old Nov 14, 2005 | 01:38 PM
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Originally Posted by TrinaBabe
I assume you have the GM 3bar sensor? Yes it should work if so. You will need to wire it to a +5 volt source and sensor ground source. The other wire (I think the green one) will go to the sensor input for whatever alchy kit you got.
I have the DTEC map sensor that plugs directly into the UTEC. All the wiring to the pump or whatever has nothing to do with this plug. I am figuring that all I need to do is provide a 5 volt and a ground. The 3rd wire in the plug I believe is for logging the boost on the UTEC which I dont need right now. I had the pump spraying as soon as the map sensor detected boost. If this 3rd wire is required for the kit to read the boost then I guess I will have to find the signal wire to the AEM. It just doesnt seem that I need to worry about that right now. Am I thinking clearly?
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Old Nov 14, 2005 | 01:46 PM
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Yep replied to your PM.. power (5v) and ground is all you need.. you should be able to find a 5v source off the MAF sensor harness... the other is signal, which is the third wire...
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Old Nov 14, 2005 | 01:48 PM
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Grr so this means he cant sell me this now. great. anyone else have one for sell.
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Old Nov 14, 2005 | 01:49 PM
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From: Winona, MN
No...

I am unsure what sensor they use (But I am almost positive it would be the GM sensor), if you could describe to me what it looks like or find a pic I could know for sure. To use the sensor (In any way whatsoever) you will need to give it power via FIVE volt... make sure it is NOT 12v (Normal vehicle wiring is 12). Off the ECU somewhere there is a 5 volt+. Use that. Now, to ground it... do not just ground it anywhere, use a "sensor ground" wire. The ECU should also have this. Now to make use of the sensor... now it can actually send info but it is worthless... it is 0-5volts. It sends this voltage through the last wire left. This is the wire that actually tells boost. It will also read vacuum so you can just assume that 1 volt = anything... there is an algorithm associated with whatever sensor you are using. So, to control the alchy, you need to splice the output wire from the boost sensor to the input wire of the alchy control box.

I dont know how about going to set anything on the AEM but I would assume you are using speed density instead of the stock MAF? If you are, you already have a map sensor on the car and could just use that one....splice a wire going from the map input wire to the AEM to the MAP input on the alchy kit. Then the alchy will read the same boost that the AEM does. Now... another way to do this is have the AEM control the Alchy. I am sure you could set the AEM to turn on a solonoid (Like a nitrous solonoid) at xxx boost at xxx rpm at xxx tps. Then you wire the power of the alchy kit to a solonoid (Depending on which alchy kit you have you could use the solonoid output from the AEM straight to power it assuming it has a seperate power source to power everything like the pump... so wire the output solonoid from the AEM to the 12v switched IF the box also has a straight 12v constant wire... kind of like how a stereo would wire). If you did it this way you could have the AEM decide when to turn it on... so not JUST boost but boost AND tps AND rpm. Then you just use the map input on the control box to control the gain.. so it sprays more alchy at higher boost.

Im not good at writing things up so I hope you can understand what I mean.
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Old Nov 14, 2005 | 02:00 PM
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Oh wow.. didn't relize this was also going to feed the AEM a boost signal also.. you probably don't want to use the DTEC sensor for that.. Its not a GM sensor, it doesn't look like any of the GM sensors.
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Old Nov 14, 2005 | 02:05 PM
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woot this means i can buy it now.
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Old Nov 14, 2005 | 05:06 PM
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Originally Posted by mike1023
woot this means i can buy it now.
hang in there. I need to find out if I can get a GM sensor from TT when they come down so we can connect it at the shop. Otherwise, I'll need it for the tune but can take it off after the new one gets installed. I am making a long drive and want to be sure the meth is flowing when I get there in some fashion.
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Old Nov 14, 2005 | 05:09 PM
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Originally Posted by TrinaBabe
No...

I am unsure what sensor they use (But I am almost positive it would be the GM sensor), if you could describe to me what it looks like or find a pic I could know for sure. To use the sensor (In any way whatsoever) you will need to give it power via FIVE volt... make sure it is NOT 12v (Normal vehicle wiring is 12). Off the ECU somewhere there is a 5 volt+. Use that. Now, to ground it... do not just ground it anywhere, use a "sensor ground" wire. The ECU should also have this. Now to make use of the sensor... now it can actually send info but it is worthless... it is 0-5volts. It sends this voltage through the last wire left. This is the wire that actually tells boost. It will also read vacuum so you can just assume that 1 volt = anything... there is an algorithm associated with whatever sensor you are using. So, to control the alchy, you need to splice the output wire from the boost sensor to the input wire of the alchy control box.

I dont know how about going to set anything on the AEM but I would assume you are using speed density instead of the stock MAF? If you are, you already have a map sensor on the car and could just use that one....splice a wire going from the map input wire to the AEM to the MAP input on the alchy kit. Then the alchy will read the same boost that the AEM does. Now... another way to do this is have the AEM control the Alchy. I am sure you could set the AEM to turn on a solonoid (Like a nitrous solonoid) at xxx boost at xxx rpm at xxx tps. Then you wire the power of the alchy kit to a solonoid (Depending on which alchy kit you have you could use the solonoid output from the AEM straight to power it assuming it has a seperate power source to power everything like the pump... so wire the output solonoid from the AEM to the 12v switched IF the box also has a straight 12v constant wire... kind of like how a stereo would wire). If you did it this way you could have the AEM decide when to turn it on... so not JUST boost but boost AND tps AND rpm. Then you just use the map input on the control box to control the gain.. so it sprays more alchy at higher boost.

Im not good at writing things up so I hope you can understand what I mean.
Dtec Sensor MAP (Dtec-MAP) US$119.00 The DTEC-MAP allows the DTEC to measure and data log boost pressure to 45psi. This sensor can be used with the TurboXS Evo8-UTEC by adding the DTEC-MAP Molex adaptor to your order.
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Old Nov 14, 2005 | 07:23 PM
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Wow strange sensor

Well... I still dont know exactly what you are trying to do with the car. The Meth controller should be very very simple.. it will most likely just read the raw voltage and wont care what the boost is. You should have probably a knob that you will turn left and right which will change from 0.3 volts to 5.0 volts. It doesnt know what the boost equates to, it will just increase the pump speed based on the voltage. Another knob will control the gain which is how fast it will ramp up per volt until the cap. The last knob should be something like a cap boost which is also just based on voltage... so at x.xx voltage stop adding more meth just hold it. Assuming yours works like that (Which most do) it doesnt matter what sensor you use.


If the AEM already is using a map sensor (Either to run speed density or to look at boost) you could easily use that sensor to feed the alchy controller. I dont see why you want to use another sensor at all if you already got one. The other thing to remember is I HIGHLY doubt whatever alchy kit you are using technically reads boost at all.... it reads voltage. Since every MAP sensor uses different voltage rates per psi you cant just switch from one to another and assume the alchy will act nearly the same. One sensor may read 2.5 volts at 20psi where another reads 10 psi at the same voltage. Whatever sensor you use for the alchy kit, you must keep the same.
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Old Nov 15, 2005 | 05:16 AM
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Smile

Originally Posted by TrinaBabe
Wow strange sensor

Well... I still dont know exactly what you are trying to do with the car. The Meth controller should be very very simple.. it will most likely just read the raw voltage and wont care what the boost is. You should have probably a knob that you will turn left and right which will change from 0.3 volts to 5.0 volts. It doesnt know what the boost equates to, it will just increase the pump speed based on the voltage. Another knob will control the gain which is how fast it will ramp up per volt until the cap. The last knob should be something like a cap boost which is also just based on voltage... so at x.xx voltage stop adding more meth just hold it. Assuming yours works like that (Which most do) it doesnt matter what sensor you use.


If the AEM already is using a map sensor (Either to run speed density or to look at boost) you could easily use that sensor to feed the alchy controller. I dont see why you want to use another sensor at all if you already got one. The other thing to remember is I HIGHLY doubt whatever alchy kit you are using technically reads boost at all.... it reads voltage. Since every MAP sensor uses different voltage rates per psi you cant just switch from one to another and assume the alchy will act nearly the same. One sensor may read 2.5 volts at 20psi where another reads 10 psi at the same voltage. Whatever sensor you use for the alchy kit, you must keep the same.
COOL. Thanks for the responses everyone. I just want to be sure that I am using a good map sensor for what I am doing with it. Trinababe, you are right about what I was using the the sensor for. Basically to detect boost or voltage so the pump would kick on. It was a benefit for me to get that one since it plugged into the UTEC and read the boost should I decide to log it. Since I am not one to tune anything, I will just leave it and give it power and ground.

As far as the AEM is concerned I beielve I can use pin 73 since it says spare 0-5v but I would like to find a good ground for it on the AEM as well. Any ideas?
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Old Nov 15, 2005 | 02:27 PM
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Im not sure about the AEM at all. I would assume it has a "sensor ground" wire as well. Most ECU's do. Im not sure why it matters to ground it to that but all sensors always say to use that ground as opposed to a body ground... perhaps it is a "cleaner" ground?
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Old Nov 16, 2005 | 05:50 AM
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Originally Posted by TrinaBabe
Im not sure about the AEM at all. I would assume it has a "sensor ground" wire as well. Most ECU's do. Im not sure why it matters to ground it to that but all sensors always say to use that ground as opposed to a body ground... perhaps it is a "cleaner" ground?
Well shimmer me timbers, I realized that I have the AEM Map seneor installed on the manifold and keep forgetting about it becasue its not tapped into a boost line but tapped into the manifold. I just have to get the signal wire on that map sensor and all should be well since its using the same plug as the stock map sensor used.
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Old Nov 16, 2005 | 10:06 PM
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good knowlege keep it coming
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