im fixen to start the wiring (b18c) in my Eg cx in the next couple of days. how an where do i run the exra three wires for my o2?

i think i know what pins to run for the IAB and EVAP purge but what exactly do they do?

one more haha, what good would come out of bypassing my pressure switch?

i wanted to get as many answers as i could in one thread

 

What year ECU? The pinouts are different.

IAB (intake air bypass) is the secondary runners in the GSR intake manifold.

EVAP purge draws a little air thru the charcoal canister where fuel is stored from evaporation from the gas tank.

Which pressure switch are you talking about?

 

the 94 p72, i was wantin to run a chipped p28 but i aint learned everything about them yet. ima end up swapping to a different intake manifold, does every IM for the b18c run IAB?

the vtec pressure switch.

 

skunk 2 type manifolds don't use IAB's, the JDM OBD2 engines don't come with the pressure switches, not sure how the ECU reads it unless its from another source. you can bypass it though.

 

so how and where do i wire the extra 3 wires for the o2 sensor. this is my biggest problam

 

Here's a link to a pinout table that someone created. Look at OBD-1 P72

http://www.phearable.net/tech/wiring/pinouts2.htm

Which sensor wires are you missing? The signal is at D14, the heater control is A6, the other heater lead wants battery voltage from the main relay, & then there's a signal ground. I can't remember which one, that pinout list is a bit vague down at the bottom with the grounds.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaPartsHero &raquo;</TD></TR><TR><TD CLASS="quote">skunk 2 type manifolds don't use IAB's, the JDM OBD2 engines don't come with the pressure switches, not sure how the ECU reads it unless its from another source. you can bypass it though.</TD></TR></TABLE>Yeah, but the stock GSR manifold DOES have IABs. I didn't see where he says JDM, sorry. I assumed it's really B18C1 & he just got lazy & dropped the last digit.

 

i got these down
vtec solenoid - a4
vtec pressure switch - d6
ground


what pins do i run these to on the shock tower? or wherever i need to run them to?
knock - d3 from computer
EVAP purge soleniod - a20 from computer
IAB soleniod - a17 from computer
the part i really aint got a clue about is making the cx 1 wire o2 into 4 wire. an where to run the 4 wires.

its gonna be a 93cx hatch with a b18c1 p72ecu. i can build motors and put them in but im tryin to learn everything about the wiring. this is gonna be my first time doin the wiring on my own.