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Unread 05-08-2014, 07:13 PM   #1
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1993 ZJ 
Join Date: Jun 2013
Location: Winchester, Va
Posts: 28
4.2 to 4.0 fuel pump question

I am swaping my 88 yj to a 4.0 and am useing the e2000 I also am useing fuel lines from a 4.0 yj and original tank I have heard to mount the pump as close as possible to the tank but any guidelines on how far I can be from the tank? If you have done it before did you cut the metal line or mount on the rubber line off the tank?

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Unread 05-08-2014, 08:01 PM   #2
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1987 YJ Wrangler 
Join Date: Mar 2008
Location: corpus christi, texas
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I have a 4.0 block in my 87 yj which was a 4.2 originally. I put a holley electric pump on the fender by the cruise control and driver headlight. People talk bad about doing that but its been there two or three years with no trouble.
Slow ride, take it easy
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Unread 05-08-2014, 09:11 PM   #3
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1988 YJ Wrangler 
Join Date: Jun 2013
Location: Whittier, CA
Posts: 808
The farther downstream you go, the more difficult it will be for the pump to prime itself. But once it is pulling fuel, shouldn't be an issue on something as short as a Wrangler. It could be a problem if you ever run out of gas and try to prime on the side of the road.
Dodge did not build my Jeep.
1988 Wrangler,4.2L I-6, Howell EFI JP-1, 5 Speed Peugeot, Zone 2.5" lift + 1/2" booms, BFG 31 x 10.5, Bestop.
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