High fuel pressure

Performance mods and Advanced Stroker discussion.
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GreenYJ
Making Progress
Making Progress
Posts: 56
Joined: October 21st, 2016, 2:02 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Wrangler

High fuel pressure

Post by GreenYJ »

In preparation for the stroker I'm building for my '94 YJ (and to perhaps get a couple of horsepower back to a dying engine) I have installed a map adjuster and adjustable fpr. To my surprise the pressure crept up to 60 psi and wouldn't move any lower. My fpr was used on a different efi system recently so I felt that wasn't the problem. I reinstalled stock fpr and still at 60 psi. Next I removed fpr and installed aluminum blank I made to replace fpr, so NO regulator, and STILL 60 psi. I ran out of time to diagnose further, but I think it's safe to say I have a restriction in the return line somewhere. That would probably explain the rich running smell...Haha.
1994 Sahara YJ
GreenYJ
Making Progress
Making Progress
Posts: 56
Joined: October 21st, 2016, 2:02 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: High fuel pressure

Post by GreenYJ »

Here's the blank next to the original fpr.
20170320_175352.jpg
And the new adjustable fpr.
20170320_175601.jpg
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1994 Sahara YJ
Shade_Tree
Noob
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Posts: 17
Joined: June 6th, 2013, 2:49 pm
Stroker Displacement: 4.6
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: High fuel pressure

Post by Shade_Tree »

Hey, just out of curiosity...did that end up being a constriction in your return line causing this?

thanks,
GreenYJ
Making Progress
Making Progress
Posts: 56
Joined: October 21st, 2016, 2:02 pm
Vehicle Year: 1994
Vehicle Make: Jeep
Vehicle Model: Wrangler

Re: High fuel pressure

Post by GreenYJ »

I haven't dropped the tank yet, but I suspect a hose got pinched. Skid plate is starting to rust so I'll probably do skid upgrade, fuel pump upgrade, and fix restriction.
1994 Sahara YJ
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