[Diy_efi] 94-95 5.0 Mustang and a hanging idle...

[Daniel Nicoson]

Keith,

What have you done to adjust the idle with the new throttle body?  Normally,
you would disconnect the ignition spout connector, disconnect the IAC and
then manually adjust the throttle plate one "screw-turn" off closed.  Then
adjust the idle bleed screw so the engine will idle without any computer
help (this would be with every load off, defroster to off, lights off etc.)

Once you get it to idle like this (fully warmed up), then turn off and plug
all back in.  See if it is better then.

If you were tuning the computer with a TwEECer or similar device then we
could do more but if you are not modifying computer settings, not much else
you can do.

HTH,

Dan Nicoson

-----Original Message-----
From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]On
Behalf Of Keith Varin
Sent: Tuesday, June 13, 2006 10:08 PM
To: Diy_efi at diy-efi.org
Subject: [Diy_efi] 94-95 5.0 Mustang and a hanging idle...

Hey everyone. First I would like to thank you all for viewing this thread.

I have a 1994 Ford Mustang Cobra with the 5.0 GT-40 motor and a manual
transmission. It is still relativly stock however with a few small mods I
began to have a hanging idle. After installing a new TB and headers the idle
would hang around 1800 rpms. my first thought was that i probably had a leak
in the intake tract somewhere. So i disassembled the intake and resealed
everything with rtv and high-tack gasket sealer. The problem went away, so I
figured I had fixed it.Low and behold, 3 days later it was raining out and I
began my 17 mile trip to work. Halfway there I realized that my car was
still idling around 1800rpms, so the work I had done did not fix the
problem.

I have since paid close attention to the conditions of the environment and
of my vehicle when the idle stays high, here is what I have figured out.

When moving at any speed greater than 15mph with the vehicle in neutral or
with the clutch pressed, the car will idle at or around 1100 rpms, and when
the vehicle comes to a stop it will idle at 800-900 (which is normal).
However, any time it is raining or very damn outside the car will idle at
1800rpms at any speed 15mph or greater with the vehicle in neutral or with
the clutch pressed.

If anyone has any input on why my car might be doing this or any ideas on
ways to fix this problem. please feel free to shout it out.

Thanks
Keith
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