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No voltage to distributor wire harness

Tiny
KEVNLKING
  • MEMBER
  • 1993 LEXUS GS 300
  • 3.0L
  • 6 CYL
  • RWD
  • AUTOMATIC
  • 229,000 MILES
Do the Distributor wire that plugs into the distributor suppose to have voltage. I replaced all fuses and relays, ignition coil, cap, ignition module, rotor and ecm.
Saturday, July 5th, 2014 AT 7:24 PM

13 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Are you referring to the spark plug wires or the wiring harness that supplies power to the distributor?
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Saturday, July 5th, 2014 AT 7:55 PM
Tiny
KEVNLKING
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  • 26 POSTS
Yes the wiring harness that supplies power to the distributor. Can I run a hot wire to the harness
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Saturday, July 5th, 2014 AT 8:03 PM
Tiny
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  • MECHANIC
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No. If I recall on these, 12v will damage the ignition system. Since you have already replaced so much, I think you need to check the ignition switch itself.
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Saturday, July 5th, 2014 AT 8:16 PM
Tiny
KEVNLKING
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  • 26 POSTS
Ok I will look into replacing the switch all of the other plugs have voltage going to them ignition module, tps, icm etc. But the plug that plugs into the distributor
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Saturday, July 5th, 2014 AT 9:43 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Before you replace the switch, trace the wiring to the distributor to make sure there are no breaks or disconnections in the wiring. Check them back to the computer to see if there is corrosion or other issue that could be causing the problem.
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Sunday, July 6th, 2014 AT 2:15 PM
Tiny
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When I removed all of the spark plugs I saw water or fuel inside two of the cylinders. I believe it is fuel because it smells like gas and it is not green the color of antifreeze. So I put all the spark plugs back in except one spark plug and When I tried cranking the engine with one spark plug removed the fuel shoots out the spark plug hole. Does it suppose to do that and do it suppose to be a puddle of fuel in the two of the cylinders
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Sunday, July 6th, 2014 AT 7:16 PM
Tiny
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No, it shouldn't do that. It is happening because there is no spark to ignite the fuel and burn it. The fuel injectors are still putting fuel into the cylinder as they should. Since there is no spark, it is flooding and filling with gas.

Once you get it running, check to make sure the engine oil isn't full of fuel. If it is, change it.
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Monday, July 7th, 2014 AT 7:49 PM
Tiny
KEVNLKING
  • MEMBER
  • 26 POSTS
1993 lexus gs300 is dumping to much fuel in the intake. If I unplug the fuel pump connector and run it straight the car runs fine but if I plug it back the car shuts off
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Monday, July 14th, 2014 AT 3:25 PM
Tiny
JACOBANDNICKOLAS
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What are you disconnecting to make it run? Is it power to the fuel pump? If that is the case, then the fuel pressure regulator is bad. However, that doesn't pertain to no power to the distributor.
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Monday, July 14th, 2014 AT 7:23 PM
Tiny
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I unhooked the fuel pump connector and ran a wire direct and every time I plug it back in the car dies and wont start and then I start smelling gas fumes.
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Tuesday, July 15th, 2014 AT 4:34 AM
Tiny
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You ran a wire direct to the fuel pump?
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Tuesday, July 15th, 2014 AT 10:04 PM
Tiny
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Yes
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Wednesday, July 16th, 2014 AT 5:56 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Then there can't be any power going to the pump via the normal route. Have you checked the power supply for continuity?
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Wednesday, July 16th, 2014 AT 8:55 PM

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