run while in start position die in run
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run while in start position die in run
I have a 77 f150 351m duraspark ignition, my problem is that while I engage the starter it will run, when i release the switch to run it dies, i put new switch, wiring harness (from module to coil & distributor), coil and resistor. The pigtail on the switch does not look like it has been hot or is damaged, any help out there? thanks
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From: Upstate NY
I had a similar problem with my '75 F-100. It quit one day on the road and when I went to restart it, it did the same thing as yours. I put a pair of vice grips on the ignition switch to hold it on and quickly unhooked the starter wire from the solenoid as soon as the truck started. That got me home. Turned out to be the ignition module; which happened to be the third new one I put on that truck in the 144,000 miles that I drove it. One of the prior modules would quit for a few seconds and come back on. Made a big "bang" when that happened. I kept driving it that way for awhile until, on one occasion, she blew the muffler wide open. I know '75 was the first year for the electronic ignition and the module was unique; later ones looked the same but wouldn't work on the '75s. Don't know if that's your problem too but it might be worth investigating. Brian G. NY
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From: Upstate NY
Okay.....let's think about this a little. I understand that you did change the "pink" resistor wire? Will it run if you "hot wire" the coil directly from the battery? Come to think of it, I don't even know if you can do that with the electronic ignition, but I think so. Just seems that if it's not the ignition switch or the resistor wire there has to be a loss of continuity somewhere in the wiring. You may have to use a test light and (working back from the coil) check for "juice" til you find it. Or....I guess you could start at the ignition switch and work forward til you lose it. Brian G. NY
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i took a wirning harness from a 78 bronco that I pulled the original 400 out of they seem to have the same connectors. pink? maybe i don't know i am through with it for today but i did run a hot from the battery to the coil and it would not fire at all??, i looked at the ignition wires i have not checked them though electrical is not my best area of expertise. all the stuff i did put on the 77 did come off my bronco though, it was running fine when i decided to drop a 460 in it. I appreciate ya'lls input i will try what you and brain said in the morning i just can't get myself to go back out there in the mosquitoes tonight
if you think of anything else please let me know. Thanks Bill
if you think of anything else please let me know. Thanks Bill
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I don't know if this will help because I didn't read it all.
I'll see if I can find more threads.
https://www.ford-trucks.com/forums/s...ad.php?t=40997
I'll see if I can find more threads.
https://www.ford-trucks.com/forums/s...ad.php?t=40997
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Well thanks guy's for the input, lets call it a miracle or faith healing or whatever, but i decided just to get the truck running and dial it in, since it hasn't ran for almost 2 years, i crossed out the solenoid, kinda like Brian's fix, yanked the starter wire off, let it run for about 5 minutes, decided to kill the engine so i took my jumper wire off the solenoid and it kept running, put everything back and it started normal, guess it was the solenoid, by the way the solenoid was new! but it is working fine now.? go figure
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Hang on a sec
Here is the pin-out to test the switch in case the problem comes back (touches wood).
http://www.clubfte.com/users/mil1ion...nFaulttest.JPG
Here is the pin-out to test the switch in case the problem comes back (touches wood).
http://www.clubfte.com/users/mil1ion...nFaulttest.JPG
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Thanks Dennis was wondering about that. sorry about posting this in the wrong place I always read everything from back to front, so i just read your guidelines on posting questions, but in the future i will use the right post and read the read first section.
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From: Upstate NY
Hey BBF460; glad to hear you got her running again. Thanks Dennis for posting that neat little diagram; it's a keeper! BTW. Back in the 70s, the '73-'75 (maybe later) F-series truck had the reputation of being the easiest vehicle ever to steal.
Brian G. NY
Brian G. NY
Last edited by Mil1ion; Mar 14, 2005 at 09:25 PM. Reason: Content
