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Volumetric efficiency refers to how efficiently the engine runs. Compare a gas engine idling with closed throttle plates (vacuum) to a diesel engine idling with no throtle plates to restrict air. Gas engine volumetric efficiency varies with accelerator pedal while the diesel runs at a constant...

If you use a volt meter you'll read 12 volts but it won't tell you if it's a big draw or tiny draw on the batt. Disconnect the neg or pos and leave the other cable connected. Clip a test wire to the empty bat post and clip a test wire to the disconnected cable, touch the wires to a small 12 volt...

99 XJ, 3 in lift, 31's. What's the solution for the left coil rubbing hard on the upper track bar bracket when stuffing? It's loud and embarrassing, would love to make this noise disappear. All stock exept for 3 in lift coils. Thanks.

I don't have the install instructions to reverse to take the locker apart, but you have to take the c-clip out to remove the axle in the side with the slot first to start the locker removal process. The other axle can't be pushed in far enough to get at it's clip without first removing most of...

Stukboy, I've been reading as much as I can about it. I found that a lot of guys had to grind the diameter of the c-clip to make it small enough to fit through the slot and I am wondering if this one might have been ground but not enough to make it fit loosly in the housing, but loose to have...

I bought a used complete 8.25 axle 29 spline with a powertrax installed. Didn't feel good about just swapping it into my 99 Cherokee with out looking at the ring and pinion ect. and checking the condition of the powertrax. I got the cross shaft, 8 springs, both sets of double springs out. I...

I've done a few trails there, lots of fun! Couldn't imagine getting very far in the snow though. I'll wait untill June or July.

The electrons in your over head are now 14 years old, at that age they sometimes get confused about where they are supposed to go and what they must do when they get there.

Two things I can think of, most important is "wierd shit = bad ground". Second, make sure you don't have a one filament bulb stuffed into a two filament socket. Like a park lamp bulb stuffed into a park and turn socket.

What camp ground are you guys going to be at? I should be there wed and thurs. I'm stopping in CO. to mess around in the Alpine Loop area and Black Bear Road before heading for Moab