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Need Help bad idle

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Old Aug 25, 2009 | 05:49 PM
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Default Need Help bad idle
im having a bad idle @ 1400rpm. 94 si/ z6
i found a video (not my car but im have the same problem).
Any help is great thanks in advance.


http://www.youtube.com/watch?v=BW0yfQU7gzU
Last edited by SlickEJ8; Aug 25, 2009 at 09:11 PM.
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Old Aug 25, 2009 | 09:00 PM
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Default Re: Need Help bad idle
....
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Old Aug 25, 2009 | 09:05 PM
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Default Re: Need Help bad idle
99 EX?
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Old Aug 25, 2009 | 09:11 PM
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Default Re: Need Help bad idle
nah 94 si/ z6
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Old Aug 25, 2009 | 09:14 PM
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Default Re: Need Help bad idle
Clean the FITV and bleed the cooling system.

Is the CEL on? Any codes?
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Old Aug 25, 2009 | 09:15 PM
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Default Re: Need Help bad idle
codes iacv and iat. i thought they were switched. i check there not..
i took the motor out my freinds car had no problems before the swap.
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Old Aug 25, 2009 | 09:21 PM
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Default Re: Need Help bad idle
i think its the 02 sensor. its plugged in but its on the down pipe and the exhaust is not hooked up could that be it?
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Old Aug 25, 2009 | 09:22 PM
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Default Re: Need Help bad idle
If you reset the ECU, do both codes return when the engine is run?

What color wires are attached to the IACV versus IAT?
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Old Aug 25, 2009 | 09:24 PM
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Default Re: Need Help bad idle
codes come back on after reset
iacv yellow/blk and green/white
iat red/yellow and green white
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Old Aug 25, 2009 | 09:29 PM
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Default Re: Need Help bad idle
What happens to the idle problem if you unplug the IACV?

What happens to the idle problem if you remove the intake and use your finger to block the port in the throttle body leading to the FITV?
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Old Aug 25, 2009 | 09:31 PM
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Default Re: Need Help bad idle
Have you tried cleaning the IAT and IACV?
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Old Aug 25, 2009 | 09:32 PM
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Default Re: Need Help bad idle
ttt
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Old Aug 25, 2009 | 09:33 PM
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Default Re: Need Help bad idle
Originally Posted by SlickEJ8
i think its the 02 sensor. its plugged in but its on the down pipe and the exhaust is not hooked up could that be it?
What happens to the idle problem if you unplug the O2 sensor?
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Old Aug 25, 2009 | 09:36 PM
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Default Re: Need Help bad idle
Originally Posted by RonJ@HT
What happens to the idle problem if you unplug the IACV?

What happens to the idle problem if you remove the intake and use your finger to block the port in the throttle body leading to the FITV?
if i un plug the IACV it has the surging idle
for the FITV i will test that tomorrow its 12:35 and my neighbors dont like me already lol.
i also will bleed/flush the coolant.
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Old Aug 25, 2009 | 09:37 PM
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Default Re: Need Help bad idle
Originally Posted by RonJ@HT
What happens to the idle problem if you unplug the O2 sensor?
nothing same thing happens
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Old Aug 25, 2009 | 09:38 PM
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Default Re: Need Help bad idle
Originally Posted by RonJ@HT
Have you tried cleaning the IAT and IACV?
they were in good working order the day before the swap could that have changed?
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Old Aug 25, 2009 | 09:45 PM
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Default Re: Need Help bad idle
Originally Posted by SlickEJ8
they were in good working order the day before the swap could that have changed?
If you think the sensors are fine, then you need next to troubleshoot the wires.
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Old Aug 25, 2009 | 09:48 PM
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Default Re: Need Help bad idle
Originally Posted by SlickEJ8
if i un plug the IACV it has the surging idle
Definitely clean the FITV.
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Old Aug 25, 2009 | 09:48 PM
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Default Re: Need Help bad idle
Originally Posted by RonJ@HT
If you think the sensors are fine, then you need next to troubleshoot the wires.
i will get the guys harness i got the motor off and see what happens ill keep you posted
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Old Aug 25, 2009 | 09:48 PM
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Default Re: Need Help bad idle
Originally Posted by RonJ@HT
Definitely clean the FITV.
ill try this first
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Old Aug 25, 2009 | 09:49 PM
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Default Re: Need Help bad idle
Originally Posted by SlickEJ8
nothing same thing happens
The O2 sensor is unlikely to be contributing, though the way it is set up, your gas mileage must suck.
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Old Aug 25, 2009 | 09:50 PM
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Default Re: Need Help bad idle
Originally Posted by RonJ@HT
The O2 sensor is unlikely to be contributing, though the way it is set up, your gas mileage must suck.
haven't got to drive the car yet lol.... trying to figure stuff out
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