4.6 crown vic: Can a pre 1991 fuel system work on a 2003 engine?

3 posts 2 contributors 1,153 views

sscott47150OP

Member since Jan 2011
2 posts
new albany, IN, USA
1 vehicle in the registry

Jan 8, 2011 at 6:16 AM

I see that the 1991 crown vic fuel system uses a supply and return line.
Since I am using a 1991 frame + fuel tank under my 1941 Ford, but putting in a 2003 crown vic motor that only uses the supply line, no return line.
My preference is to use the 1991 fuel system, but that may not be a option.
If anyone has any input on what the best direction would be, it would be welcome.
I have previously put a 1996 4.6 in my 1965 Galaxie, and it worked out great, but this is new ground for me.
Thanks

jdmeaux

Member since Jan 2009
525 posts
Lafayette, LA, USA
1 vehicle in the registry

Jan 8, 2011 at 9:13 AM

The "returnless" fuel systems have to be used as a returnless fuel system. It's programmed into the computer. If you go to a regular return system, the computer will have to be reflahed or the computer for a regular return fuel system will ahve to be used.

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It's just a SUPER-DUTY Mustang GT Sedan. 198K miles and still rolling HARD.

1997 Crown Victoria P71 SVT *** ex-US Marshall service (the CAR)
STOCK?? I bet it was modified.

13.26 @ 107.24 MPH 1/4 mi w/ me, tools, & full tank of 93 octane

I added CAI, NICHE 19 X 8.5 " wheels with 245/45ZR 19 rubbers, and completely rebuilt the front end with poly bushings, Kooks headers, 2 1/4inch exhaust, TCI 2200-2400 rpm Stall converter

.PLANS:: engine upgrade, 5.4L 2v stroker, rebuild interior in leather w/ buckets, thinking about turbos

sscott47150OP

Member since Jan 2011
2 posts
new albany, IN, USA
1 vehicle in the registry

Jan 17, 2011 at 5:53 PM

Thanks for the info.
Makes sense to stick with the complete 2003 system, front to back.

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