Kenosha Warrior Posted April 6, 2008 Share Posted April 6, 2008 I unplugged the vac line running from the Intake Manif and going to the Fuel Pressure Regulator on the fuel rail, right at the front of the motor. If I plug the manifold nipple with my thumb, it idles like crap and bogs down with any load on the motor. If I leave it open, the jeep runs like a raped ape. What gives? Link to comment Share on other sites More sharing options...
carnuck Posted April 7, 2008 Share Posted April 7, 2008 With the line off, fuel pressure shoots up. The vacuum leak makes up for the excess fuel being thrown in. Same thing happens with the 2.5L and a crack in the map sensor hose! Fuel economy becomes 3/4 of normal. Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 7, 2008 Author Share Posted April 7, 2008 So my pressure regulator is fawked? Link to comment Share on other sites More sharing options...
carnuck Posted April 8, 2008 Share Posted April 8, 2008 No. The regulator needs to be hooked to vacuum to work right! Link to comment Share on other sites More sharing options...
Kenosha Warrior Posted April 8, 2008 Author Share Posted April 8, 2008 But though, if I connect the reg. to the vac port. The jeep runs sluggish, won't accel at ALL, sputters and stumbles through all gears and I can't give it any throttle if there is load on the engine. Link to comment Share on other sites More sharing options...
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