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Moses...We spent another great extended weekend in the Black Rock with the CJ-8—except for one thing. On a day trip to High Rock Canyon, Jeep started to misfire and even backfire then just stopped running. We monkeyed around with 100 possible issues but soon learned only 20 psi at fuel rail. Would start, but give gas and die, or let idle and after a minute pressure slowly drops and engine dies. Then after further testing, pump stopped running and zero pressure. Ran a dedicated hot wire to pump hot lead near inlet and nothing...would not run. Had a spare external pump, and we cannibalized from 4 other Jeeps along, just could not make it work. Needed additional fuel lines and fittings, hose clamps, etc. We even back flowed the filter alongside the trail with what little lines we had and all sorts of black puke came out...Captured the fuel in a Coke bottle and saved it. Lots of black particles settled to bottom...So I suffered the indignity of being towed 60 miles over very silty, talcum power trail, near zero visibility (since strapped to a tow rig), and since we aired up the front tires to make steering and towing easy, a VERY rough ride. Hauled the CJ-8 to a friend's area ranch, and with help from their well stocked shop, I was able to cobble together a patch. Hose clamped the spare pump to frame rail and routed power and supply lines. What a pain! Taped a fuel pressure gauge to driver's mirror to monitor pressure on the long drive home. As for pressure, the engine idles at about 38 and bumps up to about 41 under acceleration, but no more. So plan is to cut a hole in the rear tub for future possible fails. The big question is, first, what replacement pump and are there psi values for that? Or does the regulator handle all that? Wonder whether more PSI will help run better. This is still a cold mother on start up—before doing some work, it often took 3 or 4 times to get to run. After temp sender fix, starts on 2nd try. Very likely failing pump contributed to recent performance issues. New pump will tell. And once the hatch is cut, I will carry a spare pump! Cutting the hole looks pretty straight forward. About 1" clearance, so start small and work outward. Don't want to cut the supply or return lines...In any event, will have to drop the tank to clean and see what's inside...It just might be easier to locate the access panel with the tank still in vehicle. Any thoughts on pump ratings, regulator or??? With those Ford 302 V-8 injectors, what PSI do they like to run properly? Are there any specific advantages to converting to a single fuel line supply system? I am SICK of dealing with intermittent fuel delivery issues and am now more than ever committed to designing a long-term fix. I wonder if the injectors are fuel starved? Mark
Welcome to the Jeep Liberty, Commander, Patriot and Compass forum! The Liberty served as the sequel to the XJ Cherokee, followed by the Commander, Patriot and Compass Jeep® models. Liberty went on to distinguish itself as a 4x4 off-road contender, and the Commander met the same aims as the 2005-up Jeep® Grand Cherokee. Join other owners at this community and share your experiences!—Moses Ludel The 2002 Jeep® KJ Liberty automatic transmission is just one more example of the stamina built into these 4WD SUV models. Liberty, in particular, has become another Jeep 4x4 icon!
The Jeep® JK Wrangler took the link-and-coil suspension utility 4x4 to the next level. These 2007-up models are longer, wider replacements for the TJ and LJ Wrangler. They offer better highway ride, safer cornering and braking, more cargo area and an SUV stance. A true Jeep 4x4, the JK Wrangler has earned the largest sales and following of any Jeep utility model to date...Share Jeep JK Wrangler outdoor and travel experiences, how-to, accessorization, upgrades and performance enhancements. V-8 conversions and the Pentastar 3.6L V-6 edge out the stock '07-'11 models' 3.8L V-6 performance—but there's always turbocharging for the 3.8L...Join the JK Wrangler community here!—Moses Ludel At left, Moses Ludel tests the 2012 Jeep JK Wrangler with Pentastar engine (see full report in HD video) and names it '2012 Best 4WD SUV'. Center, the Bestop Run at Moab 2012 features a number of JKs! At right, Advance Adapters targets the popular Jeep JK Wrangler for gearing upgrades and V-8 conversions—see in-depth coverage from the Advance Adapters' plant and test facility!
The modern 4WD era, and the dawn of luxury SUV 4x4s, began with Kaiser's introduction of J-trucks and Wagoneers. Beginning in the early 'sixties, consumers and commercial users discovered that driving a "truck" was no longer a hardship. The Wagoneer eventually evolved into the luxurious Grand Wagoneer, V-8 powered with every power and accessory option known to town cars of the era. The Gladiator pickup became the AMC/Jeep Pickup, a J-series chassis that used the best powertrain and geartrain products available in the industry...This forum is for Gladiator/J-truck, full-size Cherokee and Wagoneer/Grand Wagoneer owners and enthusiasts. Share your interests, technical insights, troubleshooting and more at this forum!—Moses Ludel The FSJs are often restored or modified—they also serve as an inspiration for a "Mopar concept vehicle"—with a contemporary chassis and powertrain upgrades!