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Jul 9, 2013 | 10:08 AM

#16

dixie460

Postmaster

Joined: Nov 2011

Posts: 3,533

Likes: 17

From: SW Florida

Quote:

Originally Posted by octaneforce

I wish the front tank didnt leak so i could just use it.!

It doesn't, the leak is in the rear tank Fuel Delivery Module. There's a shuttle valve in there so when the fuel line is pressurized by the front pump the fuel won't fill the rear tank. This valve along with the rear pump itself are bad, so replacing the rear FDM will fix both problems at once!

Jul 9, 2013 | 12:49 PM

#17

jroehl

Post Fiend

Joined: Apr 2004

Posts: 6,473

Likes: 4

From: Lafayette, IN

^^^ What he said. Commonly known as the Fuel Crossflow problem. There was a recall and extended recall for this on some trucks, but you're probably way past the window on this. Ford's fix was to install an inline check valve on the supply line to prevent backflow when the other tank's pump was energized. (That's how they fixed mine, anyway, but both my pumps were otherwise good).

Jason

Jul 10, 2013 | 05:17 AM

#18

octaneforce

Thread Starter

Laughing Gas

Joined: Mar 2009

Posts: 1,028

Likes: 0

From: long island

I actually replaced the rear pump/tank about two years ago and removed that recall check valve because i didnt know what it was. Can i add in my own check valve after i replace the pump just for insurance?

Jul 10, 2013 | 05:31 AM

#19

dixie460

Postmaster

Joined: Nov 2011

Posts: 3,533

Likes: 17

From: SW Florida

Sure you can add your own check valve, as long as it's rated for contact with gasoline and can handle the pressure. Just add the recall check valve back that you removed, if you still have it.

Might as well do it on both FDM's.

Jul 11, 2013 | 05:11 AM

#20

octaneforce

Thread Starter

Laughing Gas

Joined: Mar 2009

Posts: 1,028

Likes: 0

From: long island

Quote:

Originally Posted by dixie460

I definitely dont have it lol. Cant i sneak one anywhere in the fuel line? Or does it have to have those retarded quick release fittings on it?

Jul 11, 2013 | 01:24 PM

#21

BuickBrian

Senior User

Joined: Feb 2008

Posts: 146

Likes: 5

From: Mocksville, NC

Have you checked the ignition timing? Since you said it happened all at once, I would be suspicious that the distributor moved, or your timing chain jumped. Your symptoms are consistent with both.

Jul 11, 2013 | 03:02 PM

#22

Truckin Bob

Elder User

Joined: Dec 2003

Posts: 660

Likes: 3

From: Northern California

Quote:

Originally Posted by BuickBrian

Have you checked the ignition timing? Since you said it happened all at once, I would be suspicious that the distributor moved, or your timing chain jumped. Your symptoms are consistent with both.

4.9's have timing gears.

But, there is the possibility that the spout connector may have fallen out/been misplaced !!!

Bob