JusAccord

im under the car, connecting all the wires together, this one righ here i cant figure out, i might be missing something but does anyone know where this connect to? its black and blue inside

AWDManiac

looks like the knock sensor plug. Not a 100% but its right above the oil filter where the h22a4's are.

Froidas

It can't be knock sensor, because it's connector has only 1 wire.

Did you check service manual? There are all pinouts with wire colors in several pages somewhere... If you find, you can get connector number and then find the explanation in engine bay picture. I hope you understand, what I mean I am used to 4gen manual, but 5gen should be very similar + many engine connectors are all the same in H22 motors.

spoolinlude

Kinda looks like O2, can't really tell.

typemismatch

Knock sensor should be a single wire, that does look more like the O2 sensor wire, and that's where it should be on a H22 harness, off the back of the block.

I've never used an H22 harness on an H22, I converted a B-series and an F-series in my cars.

Froidas

It can't be O2 (lambda, yes?) too, because he would definitely notice that and it's 4 wires.

spoolinlude

Is the harness for that car/engine? May be something you don't need/don't have...

JusAccord

i was thinkin the 02 sensor too but all of them connected already, this h22a4 was pulled out of a civic but when i pulled out my h22a4 out my car there was a wire attach to the engine on the bottom by like the water pump, i wonder if thats where it goes and if i need it, im still in the porcess of gettin this engine started up

typemismatch

H22A4 harness would have 2 O2 sensors being that it is OBD2

aznfreakyguy

that looks like top view with the intake manifold off, could be the iab plug

JusAccord

yea u right its only 2 O2 sensors so it cant be that, its something else tho, im about to go look for someone out here wit the same car i have and look under LoL

JusAccord

iab plug?

typemismatch

intake air bypass, part of the secondary runners in the H22A intake manifold

JusAccord

o ok ill check it out

pentaq

What are the wires colors?

JusAccord

its black on the outside and blue in the inside

JusAccord

i dont have a service manual for this car

nus_dogg

I believe that would be your CKP wire.

JusAccord

wha CKP stand for?

razorlude

1 wire?....exhaust temperature sensor.

97ludedude

the wire that hooks up to iab solenoid on the bottom of the intake manifold should be a two wire connector. if that is a one wire connector it is the knock sensor. your oil pressure switch is right in that area too but your oil pressure light would stay on if it was it.