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.

EFI to carb

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Old 01-15-2014, 06:12 PM
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Jayson95GT
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Default EFI to carb

Can someone please give me some instructions on what all is required to go from EFI to carb on a 95GT?

Can I use the in tank fuelpump/OEMlines?

What will I have to do with the alternator/Charging/Starting system? Any modificatons necessary?
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Old 01-15-2014, 06:59 PM
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BabyGT
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Accessories driven by the belt will be fine. The whole intake setup will be replaced with a carb manifold and carb, will need linkage for throttle. Is this auto or a manual car?
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Old 01-15-2014, 07:16 PM
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Jayson95GT
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Originally Posted by BabyGT
Accessories driven by the belt will be fine. The whole intake setup will be replaced with a carb manifold and carb, will need linkage for throttle. Is this auto or a manual car?
Auto. Mods in sig below
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Old 01-15-2014, 09:09 PM
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dawson1112
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You may have problems with an auto because the computer controls shift points via data it receives from throttle position , engine rpm , and speed. You can use the intank pump , but will need a fuel pressure regulator for a carb ,, depending on the carb you choose I believe they require no more than 7-9 psi.

Can I ask why you want to go to carb?
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Old 01-15-2014, 09:38 PM
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Jayson95GT
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Yes I am aware of the transmission issues that will need to be addressed. I am actually thinking about buying a c4 off of a coworker to resolve this. I am considering switching to carb for several reasons, but mainly to take care of a drivability issue associated to using big cams with the old obd1 system. I have a mail order chip which helps tons but the car wants to surge at idle only under certain driving conditions. I spoke with the closest shop I could find that does dyno tuning and was told I would be best off switching to a carb setup to fix the issue. Im not sure If I will do it or not, just gathering info to make an informed decision

Originally Posted by dawson1112
You may have problems with an auto because the computer controls shift points via data it receives from throttle position , engine rpm , and speed. You can use the intank pump , but will need a fuel pressure regulator for a carb ,, depending on the carb you choose I believe they require no more than 7-9 psi.

Can I ask why you want to go to carb?
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Old 01-16-2014, 12:04 AM
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tinman
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Just MHO but I think a C-4 is what you really need.....
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Old 01-16-2014, 08:02 AM
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89fiveeight
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IDK about the SN cars, but on my fox I switched to a low pressure Holley Red series pump.

If you wanted to keep your EFI pump you may be able to run a regulator with a return line to the tank.

Maybe someone else can correct me?
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Old 01-18-2014, 11:31 AM
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Jayson95GT
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Just FYI I'm Selling all my intake/fuel injection parts as well.
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Old 01-19-2014, 12:04 PM
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Go with the C4, with the aode you have to deal with kick down cables and computer controlled shift points.
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