Original Message
Here are some other things to consider.
By james - 10/21/2003 12:54:33 AM; IP 67.66.244.241
If you have tried all the point replacement and all. It is time to look at the odd things.

The distibutor cap may have a crack in it. Run the motor with the lights off and see if there is any spark jumping anywhere. Rev it up a little for this one.

Coils almost never go bad but that is not to say that they can't.

The Petronix electonic ignition point conversion switch, that is so cool and cheap, might be a good idea no matter what...honest.

A fuel filter might be on the edge of getting stuffed and wouldn't hurt to replace anyway.

Fuel pumps almost never go bad, especially the mechanical ones that come on these motors but that is not to say you aren't one of the lucky ones.

A parsially cloged fuel line from contaminants in the fuel tank will play tricks on some. Our family car was a Buick when I was growing up that had this problem. We through parts at it and it ended up being the little sock that is on the end of fuel lines in the tank where it picks up. Taking the fuel line loose and blowing compressed air through it will remeded this. I am not sure if Ford was using this same system as Buick but it wouldn't hurt to try it. We drove the car another 8 years and it never caused another problem.

The carberator power valve could be doing the deed on your motor.

You could have some water in your fuel that a bottle of HEAT would cure pretty cheaply.

It could be one of these things or none of them but it is a place to start and if they do not fix the problem you can at least rule them out. These are all low cost procedures that will help you narrow it down. Problems like yours usually end up being something silly and small. You just have to keep on the trail until you get there. You can do it even if it gets frustrating it can be solved.
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 Thunderbird 390 motor -- king, 10/19/2003
Collapse <a href=../ForumFE/reply.aspx?ID=18813&Reply=18812><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor18813" onclick="return false;">RE: Thunderbird 390 motor</a>&nbsp;-- <font color=#0000ff>james, <i>10/20/2003</i></font><script type="text/javascript">
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 RE: Thunderbird 390 motor -- james, 10/20/2003
 Points worn out? N/M -- Royce Peterson, 10/20/2003
Collapse <a href=../ForumFE/reply.aspx?ID=18824&Reply=18812><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor18824" onclick="return false;">points...</a>&nbsp;-- <font color=#0000ff>james, <i>10/21/2003</i></font><script type="text/javascript">
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 points... -- james, 10/21/2003
Collapse <b>Here are some other things to consider.</b>&nbsp;-- <font color=#0000ff>james, <i>10/21/2003</i></font>Here are some other things to consider. -- james, 10/21/2003
 RE: Here are some other things to consider. -- EK, 10/27/2003
Collapse <a href=../ForumFE/reply.aspx?ID=18849&Reply=18812><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor18849" onclick="return false;">RE: Thunderbird 390 motor</a>&nbsp;-- <font color=#0000ff>giacamo, <i>10/22/2003</i></font><script type="text/javascript">
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 RE: Thunderbird 390 motor -- giacamo, 10/22/2003
Collapse <a href=../ForumFE/reply.aspx?ID=22791&Reply=18812><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor22791" onclick="return false;">67Tbd 390</a>&nbsp;-- <font color=#0000ff>67T-birdMaN!, <i>09/13/2004</i></font><script type="text/javascript">
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 67Tbd 390 -- 67T-birdMaN!, 09/13/2004
Collapse <a href=../ForumFE/reply.aspx?ID=22801&Reply=18812><img src=../images/reply.png width=30 height=10></a>&nbsp;<a href="#" id="anchor22801" onclick="return false;">Re Missing under power</a>&nbsp;-- <font color=#0000ff>Martin Micheelsen, <i>09/15/2004</i></font><script type="text/javascript">
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 Re Missing under power -- Martin Micheelsen, 09/15/2004
 RE: Re Missing under power -- 63 galaxie man, 10/06/2004
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