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Sensor ??? wtf is it

Old 04-25-2007, 07:54 PM
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Default Sensor ??? wtf is it

Its a b18b obd2 engine, converted to obd1 in a 95 civic
iv connected my harness which is from a Obd1 B motor , to everything, and i have a few spots on the haness left open, and 2 sensors on the engine open.....
the first one on the engine is the crank position which i don't think i need cause it is read thru the dizzy.
The second is on the intake manifold.... its the one in the pic... do i need that with obd1?? and can i use the vac port on it as an extra line, and just not have the sensor wired?

And the ---- on the harness i don't know, there are two clips that look like the map/ TPs sensor clips, but i don't know where they go...maby this harness was from a Vtack engine.... and there is a Square clip on the harness that sits under the intake many, and i cant for the life of me find where that would go, so any help would be great..

sry bout the second pic

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Old 04-25-2007, 08:07 PM
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Default Re: Sensor ??? wtf is it

Purge solenoid. Carry on.
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Old 04-25-2007, 08:13 PM
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Default Re: Sensor ??? wtf is it

cool, so it isn't important lol ... so i was also wondering...i spliced in to the map sensor clip to wire my Motorola 2.5 can i have both map sensors connected at the same time, or should i just disconnect the stock sensor?

And any ideas on the other clips on the harness..... mainly the square clip under the intake many??
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Old 04-25-2007, 08:16 PM
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Default Re: Sensor ??? wtf is it

You can't have both plugged in. What plug? Need a pic.
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Old 04-25-2007, 08:33 PM
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Default Re: Sensor ??? wtf is it

ok the 1st sensor is a Yellow with black stripe and black with blue stripe, and it is pic one

second sensor has 4 wires and is pic 2
3rd pic is both of them, i was just trying to get a better shot on the square one....its dark out now..

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Old 04-25-2007, 08:44 PM
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Default Re: Sensor ??? wtf is it

The square plug looks like an O2 sensor plug. the other may be for the Obd1 evap purge (?)
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Old 04-25-2007, 09:18 PM
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Default Re: Sensor ??? wtf is it


The round two pin with a yellow and blue is the IACV.

Better check on what you have plugged in their instead of the right one.


The other, OS sensor.


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Old 04-26-2007, 06:32 PM
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Default Re: Sensor ??? wtf is it

ok so i put the one in to the iacv and the one that i had in it has a red and yellow, wire..... it reaches to where the purge valve on the D16 motor is, so im a guess that is for the obd1 purge.. but some one correct me if im wrong

and just to make sure i dont need to wire it..

Another Question is about all those ------- Vac lines in the Black charcoal container... I know they run to the break booster and controls for heat and what not?? will boost afect that stuff or do i need to put a one way valve on the line leading to it thanks again for the help
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Old 04-27-2007, 08:16 AM
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Default Re: Sensor ??? wtf is it

Brake booster goes straight to the manifold for predictable vacuum.
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Old 04-27-2007, 12:39 PM
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Default Re: Sensor ??? wtf is it

You should probably download the service manuals and get the appropriate wire codes.
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