So the idiot i am i retrieved the wrong cel codes. Thought i was plugging in the paper clip the right way but i guess i wasnt.

I got cel codes

10 IAT - intake air temperature sensor
21 VTEC spool solenoid valve
and finally
38?- what the heck is 38..... cant find it anywhere...

How can i check if its either wired wrong? or if its actually faulty? and i do need to replace my iat what usdm iat could i use?
Help!

READ PAST THIS newest post! different problem

 

Glad the o2 is good! haha. Have you wired anything from your ECU that's unique to the JDM d15b? Such as the extra vtec wire (you'll need 2 if your car was originally non-vtec)? Another thing, if you have the EGR unplugged, it will throw a code, I'm guessing that would be 38? I'm not sure about the IAT...

 

i know mang ive been tripping about that.. haha yeah the guy wired vtec wrong and wired both vtec wires green and yellow? to 1 pinout im gonna have to check on that tomorrow and wire it right. where can i buy ecu pins to plug into the pinout?
ive been searching about 38 and it says its non existent? bad ecu? idk...

hmm can anyone help on the iat? how can i check if its wired right or if its faulty?

 

Bump anyone?

 

no one?

 

Hey bud, sorry I had a busy day. So I'm assuming your previous engine did have vtec? If that's the case, and he wired both wires to the existing vtec wire, then you're 12-16v switch happens with the vtec cam switch at 5500rpm. As for the ecu pins, you'll probably have to go to a junk yard to find them unless you know somebody. Back when I did it, I was lucky enough to have a friend who had a bunch of cut up wire harnesses laying around. I would do a search about checking the IAT, stuff like that people aren't likely to drop in and teach you on.

 

Hey dj its fine haha hmm yeah im pretty sure the guy who wired my engine for me wired both the yellow and green wire to 1 ecu pin..and i think he put it in the wrong pin. right now its connected to pin c15 when it should be in A8 right?

Remember when you had the hunting idle problem? what was causing that? im currently using the d15b stock intake manifold and there's these 2 vac plugs in the back and out of curiosity, i unplugged one and it started to sound like it ran better but would idle weirdly like in your video goes from 1 - 2 simultaneously at random. the one i unplugged was connected to the egr.


Unplugged vac line egr -> random intake manifold vac inlet ( when unplugged starts hunting idle randomly )


vacline connected to egr from back ^^^^ (unplugged)


Unplugged


Plugged, screw in other vac line?


How vtec is wired. wtf?

Can anyone tell me where those vac plugs are suppose to be connected to?

 

lol jesus that is confusing. I'll have to look into it...my idling was caused by my intake manifold not being sealed on tight enough lol..noob mistake

 

hahah the vtec? or the intake mani? yeahh ive been researching the intake manifold but it seems like no one is using the stock d15b intake mani. Yeah the 2 vac plugs are also confusing.....

 

the intake, after i swapped the hx mani on i stripped the stud. If you got a d15 intake mani you're lucky that it's manual. was your car vtec originally?

 

ohhh hmm really? cuz its a 2 wire?


is it a 2wire? cuz it looks to me it is haha not sure.. but im pretty sure when i unplug it its 2 wires... haha

i am not sure... i bought it as a shell... eh...

 

Yep that's a two wire! Unplug VTEC and see how it runs, it should make all the difference in the world...that could be your problem

 

ill unplug it tomorrow and see how it runs..vtec is supposed to be wired to a8 though right? on the ecu pin? hmm i think i need to figure out this vac line thing.. haha i dont get why the people that wired my engine put the vac line of the egr to it and the other a vacline with a screw.... haha

 

um..what my thread says if its obd2a....if your vtec is wired to the wrong pin it could be always on and that would make sense as to why its running crappy

 

5. Wiring
-----a. VTEC (2 solenoids)
++++++++2nd stage (16 Valve Mode) -- A21--red/green? test...
++++++++3rd stage (Vtec, same pin as USDM obd2a) -- A08--red/green? test...

this right? im lost on where A21 is... hahah if its under 8 its blocked..:\

 

yessir,,I would just check which is which with a test light or something b/c I havent gotten a clear cut answer on which is which. If you apply 9v to one you will be able to tell. The VTEC will cause the engine to run bad...hopefully what its doing now

 

wait.. wheres a21? under 8? haha cuz its blocked...
hmm maybe it is that... cuz its both in vtec switch and the d15b's dont have one right?

 

hmm... im gonna have to do some mad research about this intake mani.. and where these vac go to

 

it's blocked in the diagram b/c no other ECU's have that pin but the P2J. Yes it's under 8.

 

ohh mmk hmm i guess ill have to look into on how im gonna get a pin in there then hahah if i unplug the vtec is there suppose to be a huge significant difference? cuz i remember unplugging it and it didnt doo much but when i plugged in a different plug to it i think it was iat plug, it sounded worse soo i guess does that mean that its running crappy at the moment cuz vtec isnt wired right? isnt there suppose to be a ground wire on vtec or no? cuz i only have 2 wire comming off of the plug and 1 will be going to A8 and the other to A21.

 

ohh i see what you mean...your ecu plug has no place to put the pin in? i used a conversion harness cause my ecu was obd2a and my harness was obd2b, and that had all empty pin locations. maybe drill it our very carefully and use some sort of glue to keep the pin in just far enough?

 

Oh srry, before i meant the vtec wiring was confusing. but the intake is too. I've had a rough night of studying for 2 exams and i was in the midst of an intense game of cod lol

 

ohh hmmm...... maybe i should do what you did.. hahaah you think that might be my problem? im pretty sure my civic hb is a dx 1997 soo making my car obd2a? my car either came with a D16Y7 or a D13B4 hmm..... hahh soo confused..
d15b is obd2a right?
most likely leaning that my car came with a d16y7 engine.

 

d15b can be obd2a/b, it all depends on the wire harness. same exact engine for all i know. If your p2j ecu hooked right up to your existing harness, you have it right. The plugs are so different that they don't even fit at all. Def try running your car without vtec hooked up, hopefully that's the problem...the vacuum stuff shouldnt be too much of an issue yet, but something you want to tackle down the road.

 

haha its all good bro ive been super busy too with college apps and this is my senior project sooo ive just been trying to nail soo many things down. Yeah the intake is confusing like a mother.... omg.... idk what to do with the back 2 vac hahah