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need help or answer about moduel 83 Mark
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buckhunter
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Apr 12, 2008, 2:12 PM
Post #1 of 7
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need help or answer about moduel 83 Mark
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I have a 83 Lincoln mark 6 5.0, the moduel on the fender, has a plug in and a plug out, with the key on , the plug in has 1 hot wire and 1 cold, on the plug out, it has 4 male studs,two are hot and two are cold, is that right?? or should they all be hot ?? Thanks so much for your time. Bill
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 14, 2008, 3:06 AM
Post #2 of 7
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Re: need help or answer about moduel 83 Mark
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What is wrong that you are checking this module for? Is this just a rela
T
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buckhunter
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Apr 14, 2008, 10:36 AM
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Re: need help or answer about moduel 83 Mark
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Hi Tom, Thanks for your time, I should have said it was the ignition module, well I took that to auto zone yesterday and had it tested and it pasted, as for what is going on, I am trying to get this 83 mark back on the road for class as it is the last full size lincoln mark 2 door made, the body is like new in and out but I can`t keep it running, well it will not start unless I put gas in the throttle body by hand, if I do it will start and run till I turn it off, then it will not start on its own,so it is not a hot or cold thing, as for what I have changed boy easier to say what I did not change, I have changed, Throttle body-throttle position sensor- fuel pressure regulator- fuel pump ( in tank )- fuel filter-ignition coil- crankshaft position sensor- voltage regulator- timing chain- solenoid- ignition module- EGR valve- Map sensor circuit- there is also 4 sensors 2 on each fender, I changed them also,1 head lights 1 fuel pump, not sure what the other 2 are for but there changed, So Tom you asked you got it !! the one thing I can think of but don`t know how it works is, " What tells the injection to open or spray the fuel in the throttle body to start? I guess that is the trouble as I said when I pour gas in it will start, it just will not dump the gas in to start on its own, I have been worken on this for five years Tom I sure hope you have some idea, Thanks again Tom.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 14, 2008, 1:36 PM
Post #4 of 7
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Re: need help or answer about moduel 83 Mark
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Hi,
I do know a fair amount about the old Lincoln's and not so much with the Marks but this ones shares a lot with the Town Cars that I do know fairly well.
You've replaced enough stuff for now that I'll consider ruled out so let's see what's the possible gremlin now.
Runs when primed but won't restart on it's own cold or warm. This leads to a fuel pressure problem.
Here's some ideas: Battery is marginal and the power for the fuel pump can't keep up a decent minimum pressure while cranking but as soon as an engine starts the alternator is pumping power back in so it behaves. Check for voltage drop at the battery while the starter is cranking - this would be interesting. If this alone was the problem a good jump start would work.
Relays are a pill on these. They aren't marked but they do use colors at the skirts of the relay and the connectors I think. Green is for the fuel pump. It may be making a lousy contact and not providing enough amps. Originals won't fit each other but you can get a generic aftermarket one that will fit them all. I forget the part # but it's like Echlin's # AR242 or something - you'll need to ask and it's worth a try. The relays are on the driver's fender under a plastic rain sheild on the TCs and Crown Vics, Grand Marquis and can just be bent up to access or an 8mm or 5/16 couple nuts take the braket away so you can fuss to remove them with like a 1/8th slotted screwdriver. I'm guessing they are the same style as most the 80s full size Ford products. It's really worth getting one as it will fit all the others and if it doesn't fix the problem save it as I do - each of my two driver's have spares in glovebox - they are that much trouble with some of these. Sometimes just a good whack on them with the plastic of a screwdriver handle snaps them to for a while - not a fix. They look like old ignition points inside and are not servicable.
There should be a shut down resettable switch in the trunk with a red plunger - perhaps hidden on driver's side in or around the trunk hinge or behind some side carpet toward rear quarter panel. That might be making a bad contact even if not tripped fully. AYOR - if just a two wire switch unplugging it and jumping the plug connector defeats it. Don't leave it that way - just for testing for a moment!
They did that for the muliport FI systems and I'm not sure what the fuel delivery set up is for 83. Does this use central fuel injection or have the individual injectors - Marks did thing a year or more before the other similar full size Ford cars.
Hope this is the right direction for the possible trouble now. Just what I mentioned is cheap or free to try. Those relays should be about $15 bucks or less now,
T
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buckhunter
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Apr 14, 2008, 2:22 PM
Post #5 of 7
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Re: need help or answer about moduel 83 Mark
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Hi Tom, well it just so happen I was out trying to find something on the Mark, no good, so I came in and found your reply, Thanks, Ok let me reply to yours now, first off the battery is kind of new, and I have a float charge on it so it stays full charged all the time as I fool with it when ever I can, so I need to be sure the battery is up, next, Yes the fuel is the green one, I already changed that as well as the one next to it and the ones on the driver side, As for the shut down ' inertia " switch in the trunk, I checked that also, and then I un,hooked the fuel line on the frame and turn on the key and gas flew everywhere so that is ok, last but not least, yes it has the central fuel injection, two injectors in top of throttle body, I feel that is where the trouble is, I am sure there is something that tells the injector to spray gas in to start and what ever it is its not worken, but I don`t know what tells it to spray, and seems know one else knows ether as I been asking everybody, as for cost of any parts I have to much in it now to quit, hell if I don`t get it running before I die I am getting buryed in it.LOL, Ok Buddy see if you can remember anything else I can try, Thanks Bill
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 14, 2008, 5:02 PM
Post #6 of 7
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Re: need help or answer about moduel 83 Mark
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Ok: Here's one problem I have. Out of literally hundreds of similar fuel delivery systems in Ford products not one ever had this exact behaviour and there simply must be some sensor or device that delivers fuel differently just during the cranking mode. I just plain don't know what that would be so I need help now too. I would bet that you would notice a fuel pressure drop while cranking or no pulse to injection just during cranking and again I don't know what controls that.
Some assorted cars that did this cranked fast enough that they would just "catch" when you let go of the starter and you could go from there. Most of that could be solved by just leaving key in "run" position till fuel pressure built up and was available for cranking instantly which basically solved the problem without further investigation.
You may have injector leak down or somehow air pressure is only at the fuel pressured line for that important second as you said if you primed it the couple seconds it runs on the prime allowed it to switch over to a running settings.
Had I already been thru this I would know right where to test for what but don't - dammit. Either fuel pressure is lost or pulse to injectors is OFF for that period of cranking. Perhaps a wire at the starter motor is directed to something to activate things for just the crank mode. Even in 83 there are thing to disable the engine from running and dump fuel out a broken line like in an accident - the enertia swich does that. I don't know what or where the trigger to shut it down is as it never happened.
I'm also short of the best diagrams and info for all cars. Some of the guys might have it here or just know where to look.
I hope they have read this far - we get busy and sometimes don't follow along when one knows another is on a situation.
Could be a passerby reading this thread who knows or the regulars here that I think are most likely to have more help would be ............. What I'll do is make a new thread that refers to this one and I/we need some help - ok?
T
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 14, 2008, 5:59 PM
Post #7 of 7
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Re: need help or answer about moduel 83 Mark
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http://autoforums.carjunky.com/...gi?post=27105;#27105 <<<<
Bill,
Guys have helped already and let this continue at the thread above. Has a help line # and we should be done with this problem in short order I hope. There is a "prime" mode I was unaware of - just follow that thread for now.
I'm a Lincoln nut for select models as is well known by some regulars at the site I wan't to know how to fix this too! If difficult to get a part new or used and the same fits an 89 TC let me know - I'm parting one out and you can have the part for shipping!
T
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