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Idle Problem/Vacuum Routing B16 97 Civic 4 Door

Old 15-Aug-2007, 04:07 PM
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Idle Problem/Vacuum Routing B16 97 Civic 4 Door

OK I have read a bunch of threads on idle problem and still can't fix Have cleaned IACV Change Coolant Check the dizzy.


Car:1997 Civic 4 Door
Motor:b16a
OBD1 Conversion

OK I have this one vacuum port on the back of my intake manifold it's on the right where does that go????? I noticed that it's just plugged with a hose and a screw can that be causing my Idle Problem??? I look on some manuals of where these vacuum hoses are suppose to go it say IAB sensor I look at my motor and i can't find it


thank you

jdmcrxsi
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Old 15-Aug-2007, 04:35 PM
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tune up... it could be your cap and rotor with a bad connection
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Old 15-Aug-2007, 04:54 PM
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b16s don't have IAB's....only GSR's do.
I'm willing to bet that your open vacuum port is for cruise control.

It could have something to do with what program you are using on your obd1 ecu....i've found in the past, using the JDM b16 program can cause a hunting idle. Switching over to the USDM or EDM b16 program usually cures this.
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Old 15-Aug-2007, 05:16 PM
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yeah andrews right, its for your cruise control. HAve a hose with a screw in it is pretty hack imo (even though Ive done it) That could very well be the source of your vacuum leak.

Usually what I do is block the IACV port when the car is idling.. if the car remains to idle you have a vacuum leak.
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Old 15-Aug-2007, 06:26 PM
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Originally posted by zeeman
b16s don't have IAB's....only GSR's do.
I'm willing to bet that your open vacuum port is for cruise control.

It could have something to do with what program you are using on your obd1 ecu....i've found in the past, using the JDM b16 program can cause a hunting idle. Switching over to the USDM or EDM b16 program usually cures this.

Im using a chipped P28 comp
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Old 15-Aug-2007, 06:36 PM
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Originally posted by chris_v2
yeah andrews right, its for your cruise control. HAve a hose with a screw in it is pretty hack imo (even though Ive done it) That could very well be the source of your vacuum leak.

Usually what I do is block the IACV port when the car is idling.. if the car remains to idle you have a vacuum leak.
Where is the iavc port??
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Old 15-Aug-2007, 06:48 PM
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take off the duct work and it will be the top hole before the throttle plate
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Old 15-Aug-2007, 10:04 PM
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Did everything

Ok I did all that i took the air intake off and covered the hole the car does shut off i changed the spark plugs i check the rotor and car clean the terminals i have no clue what to do any more please help maybe need a new IACV???
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Old 15-Aug-2007, 11:08 PM
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Okay.. well since you most likely dont have any vacuum leaks I would majorly clean the IACV.

Take it completely off the car, fill it up with intake clean, let it sit, blow it out, repeat a few times untill the piston/spring inside has no carbon left. Also make sure the screen is clean.

If you have a FITV, take it out clean it again and turn it a bit past what it was originally set at.
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Old 15-Aug-2007, 11:36 PM
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Originally posted by chris_v2
Okay.. well since you most likely dont have any vacuum leaks I would majorly clean the IACV.

Take it completely off the car, fill it up with intake clean, let it sit, blow it out, repeat a few times untill the piston/spring inside has no carbon left. Also make sure the screen is clean.

If you have a FITV, take it out clean it again and turn it a bit past what it was originally set at.

where is the FITV? what it look like?
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