Just finished replacing the #4 injector line, for the second time. First replacement was May of this year, about 30,000 miles ago. Did I install the last one improperly, did I get a bad replacement, or do I just have bad luck? I think I need to buy another one and keep it for a spare, if they go out that fast! Is there any warranty on replacement parts? I need to find out. Not much fun trying to talk your wife in going to the dodge dealer, picking up the part, and then driving about 50 miles out into the oilfield to deliver it. Got it done and am at home now.