IACV where is the vacuum line on?

Tiny
DERT BROWN
  • MEMBER
  • 1998 HONDA ACCORD
  • 2.3L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 250 MILES
I just recently put the engine in this vehicle, and I was doing it in parts which took a little time, so I have a brain block on where the vacuum line on the IACV connects to. There are three ports on the IACV, two are coolant lines which I have connected but I can't remember where the vacuum goes. I have a photo of the IACV and have the vacuum highlighted in red.
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Thursday, July 31st, 2025 AT 4:14 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
That vacuum line goes to a small port on the intake manifold near the #4 cylinder. Here is a diagram to show you. How did you make out with the crankshaft sensor? Check out the images (below). Let us know if you need anything else.
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Thursday, July 31st, 2025 AT 11:27 AM
Tiny
DERT BROWN
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  • 8 POSTS
I thought so but I wasn't 100% sure. Thank you.
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Thursday, July 31st, 2025 AT 11:42 AM
Tiny
KEN L
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  • 54,137 POSTS
You are welcome, please use 2CarPros anytime we are here to help.
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Thursday, July 31st, 2025 AT 11:43 AM
Tiny
DERT BROWN
  • MEMBER
  • 8 POSTS
Another problem I'm having. The car idles fine but whenever the accelerator is pressed the engine stalls out and dies. I changed the fuel pump and injectors, but I don't have the right tool to check fuel pressure.
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Friday, August 1st, 2025 AT 7:01 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,137 POSTS
Sorry, we only handle one problem per thread, please post your new question here, you must be logged in.

https://www.2carpros.com/questions/new

Cheers, Ken
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Friday, August 1st, 2025 AT 11:46 AM

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