Quick Fuel Pump Question.

[john h]

1996 ls400:

fuel pump wont turn on with ignition, but will when cranking/starting engine.

is this normal for this type of engine?

background:

Started running ruff

diagnostic said cylinder 8 misfire, checked spark, ok

checked compression 160, other cylinders are 180, but still should be with in spec.

moving on to fuel.

thanks in advance.

[landar]

Something to ponder...If it were the fuel pump, why would cylinder #8 be the only one affected? The pump is common to all cylinders.

Take a closer look at your distributor cap, rotor, spark plug and wire on that side. If you have not changed out the distributor caps, plugs, rotors, wires in a while, it would be good general maintenance to do so. If you do not want to go that far, swap some of those components and see if the misfire jumps to a different cylinder.