4.7 WJ 15lbs of fuel pressure...???
What would cause this, I have been lurking around and reading all the post on related problems but still no answers. I dropped the tank and installed and new fuel pump assembly yesterday. Still low pressure while running then after i shut off the engine and the pressure drops fast. She has a rough idle but the seems to clear out, but I have to ease the pedal to rev to higher rpms, just cant go to WOT. Any ideas? Thanks!
Have you changed the fuel filter? I believe the pressure regulator is integrated with the filter in the WJs.
95 ZJ Laredo 4.0
00 WJ Laredo 4.0 & 4.7
08 WK Laredo 4.7 (traded for tin can)
07 JK Unlimited Sahara
Yep, the pressure regulator is part of the filter. That might be your problem. Change that filter / regulator.
'02 WJ | 4.7HO | Limited | QDII | 3.5" Lift (BB+OME Springs) | JKS TB | JKS Quick Disco's | JKS BPE's | RC Nitro 9000's | Rusty's SS | K&N FIPK | 40 Series Delta | Cat-Delete |
Coming soon: 31" KM2's | 15x8 Cragar V-5's
Nightcrew #236 | Blue Jeep Club #232
"those who do, can't explain; those who don't, can't understand"
I agree with these guys, fuel filter is the likely culprit. If that's not it, check for restrictions in the lines, kinks, bends, etc.
Daniel J Fenti
Owner - NC Transmission
2004 WJ Overland lightly modified
Boat Drinks OffRoad Co-Founder
what ever happened here? im in the same boat, but I changed my filter about a year ago, and i just put in a new pump. long crank to start, and rough idle. bad gas mileage. wont accelerate properly
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