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Funky Idle

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A friend of mine recently picked up a 85 rocco 8v.  Since then, we've =
been doing all the usual things the PO's never do, spark plugs, wires, =
vaccume hoses, oil change, new grounds, engine bay cleaning, new =
altenator, etc...

So now we get the beast running, and I wanted to work on the idle a bit =
so I wait for the fan to come on and go off, adjust the idle screw and =
get her down to about 950.  Figured I'd let her sit there for a bit and =
after the fan has come on/off about 3-4 times, the idle all the sudden =
startes hunting all over the place.  She climbs as high as 2k, drops to =
1k a few times and then will settle at 1800.  So, heres my question, WTF =
is up with that.  My 16v likes to idle hunt a bit right after start but =
then goes to about 950 and stays put.  This car wait till she's good and =
warm and then plays hell.  My thoughts are O2 sensor or even wrose, the =
ECU.  What is the general thoughts of the great and knowledgable list?

William

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<DIV><FONT face=3DArial size=3D2>A friend of mine recently picked up a =
85 rocco=20
8v.&nbsp; Since then, we've been doing all the usual things the PO's =
never do,=20
spark plugs, wires, vaccume hoses, oil change, new grounds, engine bay =
cleaning,=20
new altenator, etc...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>So now we get the beast running, and I =
wanted to=20
work on the idle a bit so I wait for the fan to come on and go off, =
adjust the=20
idle screw and get her down to about 950.&nbsp; Figured I'd let her sit =
there=20
for a bit and after the fan has come on/off about 3-4 times, the idle =
all the=20
sudden startes hunting all over the place.&nbsp; She climbs as high as =
2k, drops=20
to 1k a few times and then will settle at 1800.&nbsp; So, heres my =
question, WTF=20
is up with that.&nbsp; My 16v likes to idle hunt a bit right after start =
but=20
then goes to about 950 and stays put.&nbsp; This car wait till she's =
good and=20
warm and then plays hell.&nbsp; My thoughts are O2 sensor or even wrose, =
the=20
ECU.&nbsp; What is the general thoughts of the great and knowledgable=20
list?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>William</FONT></DIV></BODY></HTML>

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