Cody C

This is what I'm working with and considering how little I know about engines I'm proud of myself lol.i put a y7 in my 93 civic it's been 2 months of trial and error.i thought I had my idle issue figured out after swapping to y8 mani (after putting 3 wrong manis on) I think ive got everything close to correct and it was purring when I drove it 800 miles from TN to tx (ballsy test drive I know)no issues tho.ntho.now the idle issue is back.im thinking the iacv is bad but heres a few pics of the chaos.i know my hoses are not right so any advice is appreciated!

Cody C

I'm having trouble posting pics.idk wtf

muellersfan

Did you clean the IACV?

What ECU is running the engine?

Also post the CEL codes.

dilbeckskate

lol CEL codes ? im sure the light is coming on

muellersfan

Pull the codes.

Answers to other two questions?

Cody C

no light :-/ yes I cleaned the iacv I also ordered a brand new one yesterday just incase.i have 2 different ecu"s the one that came with the 93 civic and one I bought from a friend that told me I needed it "got it cheap so....lol" the difference in the two is it runs rough and idle drops low after pushing the gas in neutral with original edu.one I bought it revs right it only idles up and down while in neutral and when the clutch is pressed.im going to replace throttle body gasket and see if that helps.i have 2 throttle body's one has a green 3 prong plug on the bottom and one does not.not sure wich one is the correct one though.id post pics if I could!

Cody C

With a little research I now know I have 2 iacv.one on the bottom of the TB and back upper left mani.my harness only has 2 prong the iacv on the TB is 3 prong.do I need to replace my harness plug to fit or do I have the wrong tb for this setup.im sorta new to all this :-/ I'm trying though

Cody C

Btw my mani says p2k ipt-2.guess that may help in determining wich TB I need lol

muellersfan

Find a Y8 TB from a Civic with a manual transmission, and also get the 2-wire IACV connector because you need to use the 2-wire IACV on the Y8 IM.

Cody C

would the y8 TB be on the p2p pit-4 mani? It doesnt have the green iacv on it just 2 hose connections where the iacv is on the current tb I have on.my harness already has the 2 prong.2 of them actually.im assuming one goes to the little 'purge valve's nd the other the iacv on top the mani.the TV gasket covers half the hole to the iacv is this the wrong gasket?

Cody C

I messed with the distributor it seemed to help when postitioned just right but it's gotta be the iacv it revs up n down in shorter spurts fairly quickly

mk378

OBD1 systems all use a 2-wire IACV. This means use an OBD1 intake manifold or one from an OBDII manual EX, which is the only OBDII version that was 2-wire.

Cody C

I think I got it figured out.i changed the TB it seems to have leveled out the idle almost completely.itl slightly rev slowly and gets low to a slight putter and eventually levels out.this is my first build il get it figured out.thanks everyone