So as the title says I have a 95 vx with a d15b7 swap from a 92. So I have no map sensor. Getting a cel code 3. Car isn't running right (hard on fuel, backfiring, bogging at low rpm etc.) The ecu is from the d15b7, was a from the vx but changed it. Throttle body from b7. So my main question is I have the map sensor from the 92 b7 and another map sensor on a throttle body from a z6 and I'm not sure where to wire it up to. The z6 tb has no wires, b7 has about 2 feet of wire with it. I can't figure out how to wire either one up and which one would be my best bet. No plugs or anything, I don't really want to get into the wiring harness unless its my only option. Sorry for a long post, might have been confusing but I hope someone can help me out in good detail. Thanks in advance.

PS. Yup I googled it and couldn't find anything really with my situation.

 

If it's just the difference of the MAP sensor style, you should be able to swap throttle bodies to the one with a MAP sensor on top. If I'm not mistaken I've heard that 92 was unique in that it came with firewall mounted map sensors like the older 88-91 Civics.

 

Yeah I have a map sensor from a 92 I pulled off the firewall of my old parts car today. And I also have a map sensor on a z6 throttle body. But what I'm asking is where do I run the wires from my map sensor? I have the plug that plugs into the map sensor but I'm confused as to where I run the wires from there.

 

Bump. Need help asap

 

What engine harness did you use? If you used a '92 - '93 DX/LX harness you wont have a MAP sensor plug. The wires will run from the ECU to the shock tower plugs on the passenger's side and stop there, you can either add them here or directly at the ECU.

 

The wiring harness is from the 95 vx but the 92 CX ecu plugged in perfect to the harness. So are you saying I should have a plug by my shock on the pass side?

 

All OBD1 ECUs use the same plugs. If you used the original VX engine harness you should already have a MAP sensor, simply swap on the Z6 throttlebody you have and plug in the TB mounted MAP sensor on it.

 

Thanks that does help a little. But when I plug in my map sensor with the spare plug I have where do I run the wires to. Because I have the plug that plugs into the map but just bare wires coming from it. The wires are cut. Do I look for a plug from the wiring harness and go from there or do I have to cut some wires in the harness. Sorry I'm confused still

 

If you reused the original VX engine harness the MAP plug should already be there, simply plug it in, forget about this spare plug.

If a '92 - '93 DX/LX harness was used then you'll need that spare plug and you'll need to splice it in.

'92 - '93 DX/LX models had a firewall mounted MAP sensor and the plug for it is part of the cabin harness, it comes out through the firewall under the battery tray.

All other models used a throttlebody mounted MAP sensor and the plug is part of the engine harness.

Using a '92 - '93 DX/LX harness on anything but a '92 - '93 DX/LX will leave you with no MAP sensor plug. Using anything but a '92 - '93 DX/LX harness on a '92 - '93 DX/LX will leave you with 2 MAP sensor plugs.

 

Yeah I'm using the vx harness. But there's no plugs coming out for the map. I took the map off the firewall of my 92 and tried to take as much wires as I could. So I'm thinking my best bet would be splicing the wires from my map to the harness but I'm not sure which harness wires I could splice them to and get it working properly.

 

There should be.

 

Coming out near the shock tower there is lots of plugs but no 3 pins

 

Does anybody know what wires I can splice them to? This is my dd and its like a v8 on gas.

 

The plug should be next to the throttlebody. If you look at the plug for the TPS it should be in that same section of loom.

 

OK thanks a lot for the help. I'll have a look in a few

 

It looks like the MAP wires run into the harness along with the TPS wires.
Not sure if this will help (3rd pic engine upside down):

 

Just had a look. My tps sensor doesn't meet any other wires. I can't seem to find the 3 pin for my map anywhere. Don't know what else to do

 

Wire colors if it helps.

 

My wire colors are white, green/blue, yellow/green. I found all the colors in he harness but the white isn't in the same pin as the others. And I've read that their all supposed to be in the same pin. Not really sure if I should cut the matching wires or not.

 

Also the hose that should be running from the map sensor on a d15b7 is going from my egr system (black box top center of firewall) and I don't know what to do with my map sensor hoses once I did ever get it wired up. So much problems!!

 

If i used my throttle body mounted map sensor would I need any vacuum lines? Still need to know what wires to cut from my strut tower harness?

 

The throttle body MAP sensor gets its vacuum right from the throttle body/manifold. The firewall mounted one needs a hose to get it's vacuum. If you aren't using the firewall one then plug the vacuum line.

Trying to mate 2 different systems is going to be a headache. You basically are going to have to study both systems thoroughly and figure out what to connect to what if they are even compatible.

Would you like a picture of my 95 d15b7 firewall?

 

If you use the throttlebody that goes with it then no.

I'll take a look after supper and see what I can find out. I'm pretty sure I have a hacked up harness here this same thing was done to.

 

Thanks to both of you. I don't think I'll need a pic of the firewall, I'm in the process of taking my tb off. Having trouble but I'm gonna stop trying for the day. But that'd be a lot of help of there was a harness with the same done to it. All I really need now is what wires to cut. My tb seemed confusing since my egr system from the vx but I don't even think I need it in my car anymore. Might unplug it and throw it out

 

Ok here they are. I appologize for pretty bad pictures and please excuse the disaster area in the background.

Engine harness side on the left, cabin harness side on the right:



MAP sensor plug, you wire colors may differ, running left to right you should have yellow/red, green white, and I believe just white, or possibly white/yellow. If you have different colors just take note of where they are and match them correctly at the other end (the cabin harness side wont vary)



You'll want to splice into these wire at the passenger's side shock tower plugs.