90 f150 with efi to carb swap

Broncoman1532 · Aug 26, 2012

i just did the efi to carb swap. everthing went ok, i also redid the heads and everything on the top end. its a 302. the motor runs great while in park. while under a load it chokes andd falls on its face. what should the fuel pressure be at, i have a regulator on it but its maxed out at 5 psi. should i run something bigger or could it be the carb

Broncoman1532 · Aug 26, 2012

View attachment 8387

MrRangerSir · Aug 26, 2012

Broncoman1532 said:
i just did the efi to carb swap. everthing went ok, i also redid the heads and everything on the top end. its a 302. the motor runs great while in park. while under a load it chokes andd falls on its face. what should the fuel pressure be at, i have a regulator on it but its maxed out at 5 psi. should i run something bigger or could it be the carb

Why? Most people would consider this a downgrade.

Did you remove/disable the hi pressure, in tank EFI fuel pump? Carbed and EFI fuel line pressures are dramatically different. I don't think regulating an EFI pump down to carburetor levels would be a good idea.

Broncoman1532 · Aug 27, 2012

i know alot of people that have done the swap just like that. the reason for the swap was bad heads (cracked) and the upper intake was also cracked. i had a mustang with a fresh top end but the bottom end was locked up. it was easy and cheap to do the swap thats why i went that way. the motor seems to run alot better with the carb, i think the efi stuff was needing replaced, the truck had no get up and go and now it does until it falls on its face. i am sure its a fuel problem just not sure if the carb needs rebuilt or a

Broncoman1532 · Aug 27, 2012

bigger regulator needs put on

bigdaddy4793 · Nov 10, 2012

MrRangerSir said:
Why? Most people would consider this a downgrade.

Did you remove/disable the hi pressure, in tank EFI fuel pump? Carbed and EFI fuel line pressures are dramatically different. I don't think regulating an EFI pump down to carburetor levels would be a good idea.

Downgrade depends on your age and frustration level. I have a transplanted 5.0 in a truck that was a 5.8 and my frustration level is about at max pressure. I'm real close to a carb myself.

adsm08 · Nov 10, 2012

bigdaddy4793 said:
Downgrade depends on your age and frustration level.

No, carb is a downgrade.

Automatic is a downgrade.

Festiva is a downgrade.

Daewoo is an even bigger downgrade.

Amputating your pecker and having your middle finger put in its place is a downgrade.

littlezell · Nov 10, 2012

Adsm08......well said...... why on earth would you go that route?????

RangerSVT · Nov 10, 2012

Broncoman1532 said:
bigger regulator needs put on

No, the efi components needs to be replaced, WITH EFI COMPONENTS! You fall off your porch and break your leg. Are you going to cut off your leg and put a tree branch in its place?

SVT

96fordranger · Jan 22, 2013

i done this once too put a sending onit out of a carbed truck in with a mechanical pump if you have th eccentric on the cam if not use an electric inline pump

90 f150 with efi to carb swap

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