IACV where is the vacuum line on?

1998 HONDA ACCORD

250 MILES • 2.3L • 4 CYL • 2WD • AUTOMATIC

DERT BROWN

MEMBER
8 POSTS

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.

Image (Click to enlarge)

Jul 30, 2025 at 9:14 PM

STRAILER

✓Experienced Mechanic
55,112 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.

Image (Click to enlarge)

Professional Diagram for 2CarPros Members
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Jul 31, 2025 at 4:27 AM

DERT BROWN

MEMBER
8 POSTS

I thought so but I wasn't 100% sure. Thank you.

Jul 31, 2025 at 4:42 AM

STRAILER

✓Experienced Mechanic
55,112 POSTS

You are welcome, please use 2CarPros anytime we are here to help.

Jul 31, 2025 at 4:43 AM

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.

Aug 1, 2025 at 12:01 AM

STRAILER

✓Experienced Mechanic
55,112 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

Aug 1, 2025 at 4:46 AM

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