tecatown2091

I need help .I brought a 1997 civic hx coupe I has a y7 in it .and he said the o2 sensor needs to be replaced .which he lied .but I cleaned the iac out and it runs alright a little low rpm around 500-600 rpm idle .but the iac is a 2 wire .should it be a 2 wire .did he switch the motor out and not change the plugs he needed .it has p1509 and p0135 .I need some help.what should I do .

tecatown2091

no help anyone????/

Former User

What ECU and transmission?

If you reset the ECU, do both codes return?

Is 7.5A dash fuse 15 blown?

tecatown2091

manual .and how do i check what ecu it is .i will check it when i get home.ive reset ecu by battery and fuse

Former User

The ECU is located behind the plastic front passenger kick panel. The ECU will have an ID label on it. Post a picture or the ECU code.

redtherocket

d16y7 manual is 3 wire

you need one of the following ECU's.... p2e-a01, p2e-a02, p2e-a03

tecatown2091

will that fix p1509 and p0135?

tecatown2091

and how do i put a 3 wire to it .

redtherocket

p0135 is for a bad primary O2 sensor....(front one)


P1509 is for IACV malfunction...


What intake manifold is on the car...? A stock Y7 with the filter on the manifold?

What ECU do you have?

tecatown2091

im not sure he told me its all stock but when i ran the p0135 it said bank 1 sensor 2 . which the dude at oriley told me its the downstream one .im not sure the intake manifold i will post pics when i get home .car runs pretty gud just wont pass emissions

redtherocket

Post pics

Former User

This^ is wrong as mentioned.

Former User

^Also correct. You need to find a 3-wire IACV.

tecatown2091

how do i do that? buy a iac for a different engine?then how do i wire it

Former User

Start by looking for a junk yard 96-00 D16Y7 engine and buy the 3-wire IACV.

tecatown2091

when i get the wire .how do i rewire 2 wire to 3 wire

redtherocket

Before you do anything, you need to show us the manifold...


And the IACV on a Y7 is auto/manual specific.....


Purple Denso sticker = Auto...

Blue Denso sticker = Manual...


Wiring it will require you to install a pin out in the empty slot on the ECU plug..

FFsquad has the diagrams and pinout locations...

It won't be that hard...


But first...PICS.

tecatown2091

the iac toward the back of intake .if that helps till later

tecatown2091

do i have 2 iacs? one on back of intake.one connected to the tb?

Former User

I believe that the auto and manual IACVs for the D16Y7 are the same.

redtherocket

no.

I'm led to believe from your description that the original owner used a replacment Y7 head/block and used the HX intake/exhaust manifolds and used the Y7 ECU...


Just a guess..

redtherocket

Whether its OBD version, a revision, or drive specific, All IAC's for 96-2000 aren't the same on the Y7 from dealing with some idle issues on my 97.....

I tried one from an auto, and it was sending the rpm to fuel cut..

I noticed, some are spring loaded... Some are not...


No visual difference other than that sticker..

Former User

Hmmm...You may be right. I just compared IACV part numbers for the 97 Civic DX manual versus auto and they are different. Good to know.

tecatown2091

i talked to a local mechanic he thinks i have the wrong ecu .he said if its different then 1997 civic hatchback its wrong for the y7.and would throw those 2 cels.Correct?i will check the ecu when im home

redtherocket

pics

good ones...


Show the IACV connection..