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Starts when it wants to 83 Mark VI

Tiny
BUCKHUNTER
  • MEMBER
  • 1983 LINCOLN MARK VI
I have a 83 mark vi with a 5.0 in it I have it worked down to spark trouble, at the coil if I touch the red wire with a test light it lights if I touch the green wire it lights but so dim I can just about see it "BUT " if I unplug the ignition module then touch the red wire it is much brighter as well as when I touch the green with it unhooked it is real bright, I don`t know but think this is where the trouble is, I tryed another module still the same, any ideas, thanks so much for your time.
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Friday, February 23rd, 2007 AT 8:38 PM

8 Replies

Tiny
CHEVY22
  • MECHANIC
  • 1,375 POSTS
Have you checked the ign module harness for corrosion or dirt? And was the module you replaced new or used?

Thanks jim
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Friday, February 23rd, 2007 AT 9:06 PM
Tiny
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Yes I opened it and checked all the wires and no it was a used one off a wrecked one so I know it was worken, thanks Bill
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Friday, February 23rd, 2007 AT 9:12 PM
Tiny
CHEVY22
  • MECHANIC
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Do you have an ohm meter, if so I would suggest checking the module and the harness for high resistance, there are other things to check but whe you said the module was unplugged you were getting a brighter light I was thinking a shorted circuit in the module
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Friday, February 23rd, 2007 AT 9:20 PM
Tiny
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Jim thank you I will just bite the bullet and go get a new one in the am and try that I will let you know after I put it on, heck I have changed everything you could name under the hood, its been acting up for awile starting when it felt like it, sometimes for days or weeks then just stop starting crank good but no start, then in afew days start up and run grate for afew days, but now its been a few weeks. Thanks Bill
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Friday, February 23rd, 2007 AT 9:28 PM
Tiny
CHEVY22
  • MECHANIC
  • 1,375 POSTS
You can do some basic testing befor you buy one if you have a test light, you can pull the connector and check the harness for power, dirt and corrosion, plug it back in and check power on the module side, let me know what happens

jim
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Friday, February 23rd, 2007 AT 9:31 PM
Tiny
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Hi Jim, I used the test light as you said and have power on both sides, I now have the fire but now up to next trouble, I have fire at the plugs, and I have fule to the throttle body, but it will not start, I can crank it over push in the pressure relief valve and it will spray gas to the fender crank it over again and the pressure is right rack up " BUT " it will not start, IF I put some gas in the throttle body it will start right up and run till I turn it off the it will start a few times the back to a no start unless I put gas in it myself, something is not telling it to give it that first shot of gas to start, I have been fighting this for so long its really making me nuts.
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Sunday, June 24th, 2007 AT 8:29 AM
Tiny
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  • 22 POSTS
Can someone tell mewhat to check for head light trouble, trouble is auto on will not work, I changed the thing under the dash, I say underdash but I mean under top of dash?
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Wednesday, July 4th, 2007 AT 5:23 PM
Tiny
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  • 22 POSTS
I read the gas cap could cause a no0 start? If it is the cap, will trying it with NO cap tell me if the cap is bad or do you need a cap to start.
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Sunday, July 15th, 2007 AT 6:59 PM

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