99 Explorer EFI fuel pressure question

[bigmuddy]

The Kincer tank is a beautiful piece but hangs down too far imo. The bottom is 10" below the bottom of the frame rail per email convos with them a few years ago. That's 4" lower than my WH tank (and prob the Duff/LC tank). Not a problem if you're just street cruising but for a guy like me that 'wheels and doesn't have a lot of lift, I'd be hitting it on a lot of rocks, etc.

Todd Z.

Good intel Toddz!

 

[rjrobin2002]

I keep thinking this is my issue. The FPR is somehow returning more fuel than it should. Also, in my circumstances, it isn't holding pressure at all when turned off.

Mine holds 48psi with key off for a while.

 

[Rox Crusher]

The Kincer tank is a beautiful piece but hangs down too far imo. The bottom is 10" below the bottom of the frame rail per email convos with them a few years ago. That's 4" lower than my WH tank (and prob the Duff/LC tank). Not a problem if you're just street cruising but for a guy like me that 'wheels and doesn't have a lot of lift, I'd be hitting it on a lot of rocks, etc.

Todd Z.

I currently have 23 gallon BC Broncos tank and occasionally hit it on the trails, which I why I really like the looks of the Duff / Lick Creek set up...............but man that thing is expensive!

 

[Rox Crusher]

I'm curious about this as well.

Also, I've never fully understood what the dampner on the "returnless" rail does. If the Explorer's OEM configuration has the regulator and bypass function in the tank, and providing a constant fuel pressure to the rail, what is the dampner for? Maybe it somehow compensates for variations with the injectors. Just spit ballin'.

Doing a little research and found this helpful.

 

[Rox Crusher]

Mine holds 48psi with key off for a while.

Doing some research and found this helpful.

 

[bigmuddy]

Doing a little research and found this helpful.

Ive read that it help maintain consistent fuel to the injectors and lessen spikes to the same.

 

[ntsqd]

With a name like "damper" that is what I'd expect it to do, damp out any pulsations in pressure.

 

[rjrobin2002]

I just thought about one more thing I need to check. I need to verify my fuel tank cap is venting.

I'm gonna drive it again and when it starts dropping fuel pressure.

I am gonna open the fuel cap and see if it's got negative pressure and if the fuel pressure drops resolve.

 

[SLOWnEASY]

Fill the tank first so you don't have to wait so long for the vacuum to build.

 

[bigmuddy]

Did this get resolved, curious to what was the fix?

 

[rjrobin2002]

Fuel pickup issue, LOL

 

[bigmuddy]

Fuel pickup issue, LOL

HA! sorry to hear that but I can imagine.
I recently pulled out my BCB tank with in-tank pump and found the hose was rotted, the filter or whatever the paper thing at the bottom was badly disintegrated. It's been in that tank for probably 12 years though? Probably the 5-7 just sitting.

Honestly, not a great design, but I don't know how long the mustang pumps and related components are supposed to survive being in gas 24-7.

Glad you figured it out.