#1077556 - 10/10/11 06:33 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: 451Mopar]
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master
Registered: 01/19/03
Posts: 4664
Loc: Newfoundland
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Too bad he dosen't have a point distributor to drop in for a minute . he would at least know if the wiring harness , ballast , and cranking voltages were ok . Like i said in previous posts, this looks to be ECM issue. There is only one thing I can think of that has not been addressed .......is it possible that the ignition switch housing is worn and when in starting mode he has the key twisted beyond the contacts and that only the starter is cranking and no ignition? But isn't the ignition being fed from the relay ? I don't know whats wrong why this car is not starting and I see no reasons why it won't at present time and what been tried . This is not rocket science, i know its difficult for someone who is just learning but for us seniors who have 40 -50 yrs at this stuff, it bugs me to no end .  
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#1077557 - 10/10/11 09:32 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: mopar_man]
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member
Registered: 10/01/10
Posts: 183
Loc: Eden, Texas
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LOL...you are right...for those of us that starting off building crystal set radios 60 years ago, using a meter and checking circuits was just part of growing up. It's frustrating to try to help someone and not being able to show them how to do it.
This one is crazy because it does not work when everything is bypassed, but, we know the components work because it does start and run. Going to an extreme and powering it from a separate battery may seem uncalled for, but, it seems we have to prove it will work when it gets the right voltage.
The anomaly in this set up is the ignition box mounted inside the car...we may ultimately discover that the quality of ground is turning it off when the current draw increases.
_________________________
Steve
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#1077562 - 10/11/11 09:14 PM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: MONC]
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master
Registered: 01/19/03
Posts: 4664
Loc: Newfoundland
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Quote:
I am hoping to work on the car tomorrow, at least for a little while.
I am going to take the glove box out again (and leave it out) so I can have easier access to the ECU for testing.
Mopar man, can you explain more about your theory of the ignition switch being worn out? With the replacement of the switch, what exactly would be worn?
The key goes in the cylinder and all that does is allow it to move the switch into the various positions, right?
Or am I missing something?
Monc, I never said the ignition switch would be worn out . I was wondering about the housing . I am not sure of the configuration , did you replace the whole unit including the cylinder and keys ? Even if you replaced the switch and never replaced the rest of the ignition it may be possible that the key could be turning the switch beyond the contacts that energize the ECM. I really don't know if thats possible but at this point most of us are just grasping for straws.
This engine should be running long ago .
How about twisting the key very slowly and don't twist all the way, just enough for the starter to engage and see what happens. It just may be that your twisting beyond the starter contacts .
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#1077565 - 10/12/11 06:10 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: magnum440]
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enthusiast
Registered: 09/11/06
Posts: 277
Loc: Palmyra, NY
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FWIW A guy at last nights cruise said he had this problem, said the DC wires to the coil were somehow reversed. This was a standard original points system though.
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#1077566 - 10/13/11 10:31 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: mopar_man]
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master
Registered: 04/08/04
Posts: 3037
Loc: The Historic Hudson Valley
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Quote:
Quote:
I am hoping to work on the car tomorrow, at least for a little while.
I am going to take the glove box out again (and leave it out) so I can have easier access to the ECU for testing.
Mopar man, can you explain more about your theory of the ignition switch being worn out? With the replacement of the switch, what exactly would be worn?
The key goes in the cylinder and all that does is allow it to move the switch into the various positions, right?
Or am I missing something?
Monc, I never said the ignition switch would be worn out . I was wondering about the housing . I am not sure of the configuration , did you replace the whole unit including the cylinder and keys ? Even if you replaced the switch and never replaced the rest of the ignition it may be possible that the key could be turning the switch beyond the contacts that energize the ECM. I really don't know if thats possible but at this point most of us are just grasping for straws.
This engine should be running long ago .
How about twisting the key very slowly and don't twist all the way, just enough for the starter to engage and see what happens. It just may be that your twisting beyond the starter contacts .
I was just trying to understand where these contacts are so I can check them. I did not replace the lock cylinder , only the ignition switch.
I will try your suggestion though, easy enough to do.
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#1077567 - 10/13/11 10:34 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: Strawdawg]
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master
Registered: 04/08/04
Posts: 3037
Loc: The Historic Hudson Valley
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Quote:
Quote:
I am hoping to work on the car tomorrow, at least for a little while.
I am going to take the glove box out again (and leave it out) so I can have easier access to the ECU for testing................
Is it bolted to the firewall? Thinking of a means to run a ground strap from the mounting bolt to the engine to cover that base 
I find it much easier to troubleshoot than try to give clear instructions on how to do it
The ECU is not bolted to the firewall it is bolted to the dash frame.
I didn't get a chance to do anything the other day, will have to wait until Saturday.
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#1077569 - 10/22/11 09:39 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: MONC]
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I Win
Registered: 01/20/03
Posts: 73560
Loc: U.S.S.A.
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Do you have another ECU to try ?
also do you have a helper to crank the car over while you check to see that you have voltage at the positive side of the coil ? Not sure if you did that already ?
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#1077571 - 10/22/11 10:09 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: MONC]
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I Win
Registered: 01/20/03
Posts: 73560
Loc: U.S.S.A.
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Quote:
Going to go back in the post and look at the ECU tests now that I have it accessible . ( mounted behind glove box - no I did not put it there...)
Since you have it unbolted now might be the time to move it to a place more accessible ? But out of sight?
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#1077573 - 10/22/11 10:41 AM
Re: Car starts when key is RELEASED, why? * UPDATE*
[Re: MONC]
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member
Registered: 10/01/10
Posts: 183
Loc: Eden, Texas
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Hey!!! It is undoubtedly progress...that has to be a good feeling. Sounds like it may have been suffering a big voltage drop across the ground when the starter was engaged.
I would try to insure a good ground path back to the engine to optimize it.
Keeping my fingers crossed that it keeps running!!!!!!!!!!!!!
_________________________
Steve
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