Idle goes up and down when the engine is warm

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Old Sep 26, 2004 | 11:20 AM
  #1  
Ri5e's Avatar
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From: Northern, VA
Default Idle goes up and down when the engine is warm

My friend has a B17 in his car and the idle goes up and down only when the car is WARMED up.
When it's cold, the idle is normal.

The idle was normal before. Then he swapped out the turbo manfifold and the turbo but he cut his downpipe from the turbo so it's running open downpipe. The O2 sensor is about 4-5 Inches from the opening end of the downpipe. Could this effect the idle?

Also there is no CEL popping up
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Old Sep 26, 2004 | 02:19 PM
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From: kauai, HI, USA
Default

Sounds like a vacume problem. Check for leaks.
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Old Dec 30, 2004 | 04:10 PM
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Default Re: (Waachback)

back from the dead because I have the same problem.
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Old Dec 30, 2004 | 05:47 PM
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From: honky in, nc, usa
Default Re: (spankjelly)

https://honda-tech.com/zerothread?id=343980
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Old Dec 31, 2004 | 12:34 AM
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From: Fargo, ND, U.S.A.
Default Re: (abnaasefmb)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by abnaasefmb &raquo;</TD></TR><TR><TD CLASS="quote"> https://honda-tech.com/zerothread?id=343980 </TD></TR></TABLE>

Good find, anyone have that post on how to clean the IACV?
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Old Dec 31, 2004 | 01:48 AM
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Default Re: (spankjelly)

I had the same problem after installing the Skunk2 IM which didn't have room for the FITV. We had a plan to make it work with some re-routing of cooling and vacuum tubes, but because the manifold and gasket didn't fit properly (B16 parts on B16A1) we just switched back to OEM. Got coolant into the cylinders
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