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Old October 19th, 2008, 02:49 PM   #1
78ford460
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I have a 1978 ford f150 that i just put a 460 in. The problem is when i go to start the truck i turn the key all the way over and the starter kicks in then when i let go the starter stays running and wont shut off unless u turn the key complety off. Please give me some suggestions on what it might be.
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Old October 19th, 2008, 02:53 PM   #2
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try switching the two small wires on the magnetic relay around
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Old October 19th, 2008, 02:55 PM   #3
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Sounds like the solenoid may be stuck.

You would get much better response if this were in the general or the Ford tech section.
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Old October 19th, 2008, 09:42 PM   #4
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Please give me some suggestions on what it might be.
I suggest that you click on the "!!" button under your name and location in the first post and ask for the thread moved to Ford Tech. You will get a lot more help there.
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Old October 20th, 2008, 03:22 PM   #5
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I've been working on it also. Its not the starting solenoid. Not the started either. All the battery/starter cables are new. Any ideas?
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Old October 20th, 2008, 03:31 PM   #6
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Could be a faulty ignition switch. Not the most likely thing, but possible.
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Old October 20th, 2008, 03:32 PM   #7
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Could be a faulty ignition switch. Not the most likely thing, but possible.

That was the first thing i thought. We have tried 3 different switches with still no luck.
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Old October 20th, 2008, 08:14 PM   #8
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is it a new starter?
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Old October 20th, 2008, 09:38 PM   #9
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Yeah its a new starter
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Old October 20th, 2008, 09:44 PM   #10
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new starter, solenoid, tried different switches, tried switching the wires on the solenoid. its weird somebody has got to have a good idea
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Old October 20th, 2008, 10:08 PM   #11
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If the solenoid is ok then you have wires shorted together with the activator wire (S terminal) on the solenoid. My first guess would be charging system wires, as they are in that same harness.
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Old October 20th, 2008, 10:20 PM   #12
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Quote:
Originally Posted by bronco4-play View Post
If the solenoid is ok then you have wires shorted together with the activator wire (S terminal) on the solenoid. My first guess would be charging system wires, as they are in that same harness.
have to check that...thanks.
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Old October 21st, 2008, 04:30 PM   #13
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You could also have a ring gear that is so chewed up it is holding onto the gear. What does it look like? Take some pics.

Tried disconnecting the truck from the starter and just hitting it with some jumper cables straight from the battery?
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Old October 21st, 2008, 05:11 PM   #14
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The ring gear is good. The starter is new, and we did do the jumper cables and i worked good. So the started is not the problem. Still need to check the (S) (I) wires for bare spots make sure there not grounding out somewhere.
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Old October 21st, 2008, 08:46 PM   #15
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By chance is there a way that the rod in the steering column is sticking.
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Old October 21st, 2008, 08:49 PM   #16
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Quote:
Originally Posted by fordlovinfarmer View Post
By chance is there a way that the rod in the steering column is sticking.
x2

ive heard of this happing more than once.

had a buddy with the same truck that did it.
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Old October 21st, 2008, 08:55 PM   #17
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Quote:
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x2

ive heard of this happing more than once.

had a buddy with the same truck that did it.
78 Fords have the key in the dash
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Old October 22nd, 2008, 12:53 PM   #18
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Hooked up a push button start yesterday to bypass the (S) wire on the solenoid, and it turns out that was the problem. Wire must have a bad spot on it.
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