coug66

I had one fuel injector set of wires come loose from a fuel injector plug?

ls430 driver side second plug back from front.

If polarity doesn't matter it will be fine but if not it wont run right.

coug66

thank you, I just discovered I needed a new Heater valve as one of the ports had broken apart and was leaking.

Then I decided to replace the drivers side valve cover gasket and pulled the wires off the injector.

I looked up a schematic and the ground wires seemed to be on the left side of the plug, so I reinserted the wires in left side black.

So this little hood opening solved coolant leak, valve gasket replacement, ( tore new one and went back to old. so then I ordered another new one. ) and fuel injector wires.

rkw77080

No, it does not matter! The driving mechanism of an injector is essentially a solenoid. The fundamental operating principle with a solenoid is the following: driving current through the winding causes the plunger to move toward the magnetic field, i.e., into the region enclosed by the winding. Reversing the polarity of the applied voltage does not reverse the direction of movement, because a typical plunger is just a piece of metal (not a magnet), and thus it is always attracted to (not repelled from) the magnetic field.

But if you're a By-the-book kind of guy, then...

mykvr6

Yes! I figured this when I had to repair mine but I did rewire mine to match everything else just in case. Pass side first position are all green/white IIRC