Name these plugs rb20

[squbafreak15]

hey guys my rb20 s13 swap isnt starting. it has spark fuel and its turning over and its timed correct. it has new spark plugs also. well i was looking at it today and saw two plugs from the wiring harness that wernt plugged in. i cant find where they go can you guys help

the are located inbetween the firewall and the manifold right where the harness goes under the fuel rail.

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the vacume lines are hooked up now i removed them so i could get a clear shot of the plugs

[crazyandevil05]

Purple one is for the AAC, idle control stuff. plugs into the purple socket (convenient) which should be bolted the the intake manifold. but nots sure on the 3 wire, maybe O2 sensor?
Modified by crazyandevil05 at 7:02 PM 1/18/2010

[squbafreak15]

there is a brown plug with the same color wires that plugs into the aac. the plugs are hardly diffrent.



and the aac has a brown male end on it.



so what the heck does the purple one plug into?

[tad_07]

check the iac for the purple one, Ill look at my car tomorrow & let you know. To late to go poking around out side.

[robbie2883]

there should also be a purple plug on the iac. this get's hooked up when you have working AC.

the gray plug looks like either tps or fan switch for AC

[squbafreak15]

the tps is hooked up. and im not running ac

[RustspecS13]

That three wire plug looks like it could go to the o2 sensor or the power for the coils.

Most plugs on the harness only go in one spot but put those two next to each other and which ever one has more slack goes to the o2 sensor.

Are your spark plugs wet? pull your CAS and spin it and make sure all your injectors are firing, and same for your coil packs.

When I first swapped in my rb20 my injectors weren't getting power, the relay trigger was damaged and the relay by the ecu wasn't getting a signal.

If you do have spark fuel, do you have constant signal? My cas got damaged and was giving inconsistent signal at one point.

~Alex

[Carl H]

that does not look like an rb20 harness...is that a 25 harness?

[squbafreak15]

it better be a rb20 harness. thats what i dropped off at zfever to have them get it converted with all the problems i had with them it wouldnt surprise me if it was a 25 harness.

the injectors are firing and all the coilpacks are sparking. idk how to tell if the cas is partialy broke?

[90240sxca18]

Right under the TB and the fuel rail, there is a little box, right in between cyl 3 and 4...its another part of the IACV...the purple plug should plug into that...if im not mistaken, he other ones I cant tell you because I need a picture from further out...so I can see where on the harness they are, and where on the motor they sit.. get more zoomed out pictures and ill try n tell ya the others.

[90240sxca18]

Ohh... reach under your intake manifold....touching the block....right around the first two cylinders....in between all those coolant lines n s*** under there...it will feel like a knock sensor...or a oil pressure sensor...not the one twords the back...around the last 2 cylinder....but the one that is coming off the block around #1 and # 2...there should be a somewhat long plug coming off that, that does not plug into your lower harness...that should be to ur other brown plug shown....if not...then check the plugs on ur 2nd injector harness, and see if there is an extra one on there...like I said above I cant tell from that picture.