2002 GT Fuel Tank - What Goes In These 2 Holes?

892 Views 3 Replies 2 Participants Last post by crjackson, 2 mo ago

dmw_4814

I'm going to be replacing my fuel tank & pump assembly soon (I have one of those Walbro 255LPH pumps that I bought about 3 years ago, and never even took out of the box), and need to know what goes into the two holes I circled in red in the attached photo. I know the fuel tank vapor vent valve goes in one of the holes (I'm pretty sure), and I'm thinking it's the larger of the two holes. What goes in the other hole? I thought on some earlier models a separate fuel gauge sending unit went in there, but isn't the fuel gauge sending unit on the 2002 Mustangs integral with the pump module/assembly?

Any info would be greatly appreciated! Thanks.

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crjackson

· #2 · 3 mo ago

Sorry, I really don’t know. Hopefully someone will have an answer for you soon. If you find the answer first, please post the info here. I may help someone else later.

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dmw_4814

Discussion Starter · #3 · 2 mo ago

crjackson said:
Sorry, I really don’t know. Hopefully someone will have an answer for you soon. If you find the answer first, please post the info here. I may help someone else later.

The smaller hole is for the vapor vent valve (which is still available from Ford), and the larger hole is for a fuel pressure vent valve (which has LONG been obsolete from Ford, and isn't available new ANYWHERE). That latter part, the fuel pressure vent valve, is EXTREMELY difficult to remove without breaking/destroying it, and you need that for your car to run properly (well, at least so you won't have any check engine light). I had to use my Sawzall to cut the tank open (I of course emptied it of all gasoline and cleaned the inside), and even then, it was still hard to get out. I ended up partially breaking mine, but I think I can super-glue the broken part back on, without affecting its functionality.

The problem is there's a groove in the cylindrical body of the valve, and when you push it into the opening of the tank, the seal in that opening sits inside that groove, and makes it nearly impossible to get it out, even while trying to push it out from the bottom of the valve. I ended up having to use a small flat-blade screwdriver to cut away pieces of the rubber gasket.

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crjackson

· #4 · 2 mo ago

Thanks for the followup. I wonder if there’s anyway to eliminate the need for that part. It’s totally ridicules that no one makes a replacement. Since it’s so hard to remove, even getting one from a salvage yard seems impractical.

It appears the part is available through the aftermarket (Dorman). I found one local to me at Advanced Auto.
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