5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Couple of Questions

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Old 06-26-2007, 06:50 PM
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Texas5.0
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Default Couple of Questions

I just completed my trick flow swap, 24# injectors, 70 MM mass air and 70 MM throttle body.

1. Do I need to do anything with the fuel pressure?

2. Did a search on the idle air control valve and can't find an answer,
Is there a way to clean this part or is one of those parts that has to be replaced if bad?

My car is idling like crap and dies at every red light unless I stay on the gas.
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Old 06-26-2007, 08:20 PM
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stang8689
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Default RE: Couple of Questions

you should have an adjustable fuel pressure regulator and set at i think 42 pounds, I have one for sale cheap, pm if interested

the IAC can be cleaned, remove the bottom, 2 phillips screws and soak it in some kerosene.
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Old 06-26-2007, 08:23 PM
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2 kwik
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Default RE: Couple of Questions

a 65mmt/b was all you needed and you MAF is too small..and set your F/B @ 35
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Old 06-26-2007, 08:28 PM
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Texas5.0
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Default RE: Couple of Questions

I don't have an adjustable FPR. So apparently I need to get one?

Why is my mass air too small?
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Old 06-27-2007, 12:17 AM
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Default RE: Couple of Questions

anyone?
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Old 06-27-2007, 08:13 AM
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Default RE: Couple of Questions

bump
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Old 06-27-2007, 11:41 PM
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Texas5.0
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Default RE: Couple of Questions

Well I checked the fuel pressure tonight and the gauge read 25 - 30. How low is this?
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Old 06-28-2007, 12:33 AM
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XSRACINGGT
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Default RE: Couple of Questions

is that with the vacume line off or on the fp regulator? if its with it on, then you are too lean. u need an aftermarket one.
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