Help engine idle hunt

[Domo1986]

Hey guys new to this . 1998 civic lx auto d16y7 just did a y7 to y8 intake swap and I'm getting a bad idle surge . swaped the intake manifold gasket . changed the throttle body gasket to a new y7 one replaced pcv valve . made sure to bleed the coolent system . checked the idle control valve and even blocked it off, ( seemed to work until it warmed up) no check engine light on just dont know what else to do please help

 

[XpL0d3r]

What year manifold? I believe with 99-00 mani's there's an extra port you need to block off.

 

[Domo1986]

I'm not entirely sure what year its from but it does have a port coming from the top of where the manifold bolts on to the head . ive already blocked that off

 

[Domo1986]

Ya it definitely is off a 99-00

 

[XpL0d3r]

Take a look at this link here:
https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/surging-idle-after-y8-intake-manifold-swap-y7-1215948/

 

[Domo1986]

I already did the new y7 tb gasket . but it being a 99-00 intake will it work on a 98 d16y7???

 

[XpL0d3r]

I think you need a Y8 TB gasket IIRC.

EDIT: https://www.d-series.org/forums/general-tech/2470-d16y7-d16y8.html#post18557