Starting Problems
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Fleet Mechanic
Joined: May 2009
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From: Bay Area, Unfortunately
Starting Problems
Hey guys - here's the deal, my truck dies on me yesterday. I got it towed home, and it turned out to be that the nut fell off the positive side of the coil. Well, I replaced the ignition module with an Autozone one prior to finding out that it was just a nut. I also replaced the battery cable going from the battery to the starter solenoid. Now when I start it while it is cold, it will crank about half way, and then sound like it is binding. Let up off the key, crank it again, and will not start. Keep trying it, and then found you have to keep cranking it until it will finally sort of catch, then it will start running. Now, once it is warm, no starting problems at all. I swapped back to the Motorcraft module, and still the same problem.
Prior to this, I never had to excessively crank the engine. Oh yeah, the problem seems to have gotten worse after I replaced the battery cable with a new 2 gauge one.
HELP ME!!!!!! Oh it is a 1986 F-250, 351w, carbed.
Thank you,
Nick
Prior to this, I never had to excessively crank the engine. Oh yeah, the problem seems to have gotten worse after I replaced the battery cable with a new 2 gauge one.
HELP ME!!!!!! Oh it is a 1986 F-250, 351w, carbed.
Thank you,
Nick
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Fleet Mechanic
Joined: May 2009
Posts: 1,460
Likes: 6
From: Bay Area, Unfortunately
Thanks guys, is this just a coincidence? I am reaching a point where I am trying to figure out what to do. I am scared of throwing parts at it, and wasting the money.
Fleet Mechanic
Joined: May 2009
Posts: 1,971
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sorry for the super large image... but im sure this is what you're going to see if you inspect the teeth of the flywheel. The teeth of the starter are going to be pretty rounded off ,if not chipped as well.
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Fleet Mechanic
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From: Bay Area, Unfortunately
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From: Virginia
So explain again what it does. At first you said the engine will turn over and then lug down and not turn? And after that, it will not turn over at all?
Or now is it turning over ok, but will not fire?
Or now is it turning over ok, but will not fire?
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From: Virginia
So explain again what it does. At first you said the engine will turn over and then lug down and not turn? And after that, it will not turn over at all?
Or now is it turning over ok, but will not fire?
Or now is it turning over ok, but will not fire?
Fleet Mechanic
Joined: May 2009
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Your engine is doing everything his does. Some days it never missed, and started right away. Other days, it skipped around, and missed quite a bit. It never didn't start, until now, but that was because it refused to catch the teeth at all.
The least you can do right now, is to pull the starter off and inspect the teeth.
The least you can do right now, is to pull the starter off and inspect the teeth.
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Fleet Mechanic
Joined: May 2009
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From: Bay Area, Unfortunately
Sorry for all the confusion guys, the starter is engaging the flewplate with no problem. It is spinning over the engine, but the engine is not firing. The first part about it not spinning over, was that it would spin the engine about half a revolution, then it would act like it bound up. Release the key, try again, and the engine spins over fine. But that is the problem. It spins and spins, but does not fire. The engine finally fires (weakly), then runs like a top. Turn it off, try again, and it is fine. Let it cool down, and the same thing happens again. Now that Ithink of it, it had a few hot start problems in the past few days.
Thanks guys!
Thanks guys!
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From: Virginia
What is your normal cold starting procedure? It could be a weak spark as was just mentioned, but it also could be a choke problem(not closing fully). If it is a choke problem, pumping the gas pedal about 3 times before cranking might help it out, though it will probably stall again unless you keep patting the gas.
If that doesn't work, I would suspect a weak spark also.
If that doesn't work, I would suspect a weak spark also.
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Fleet Mechanic
Joined: May 2009
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From: Bay Area, Unfortunately
I normally start it like you said, 3 pumps and it fires right up. I was wondering, is there supposed to be a circuit sending 12 volts to the coil during cranking? I thought that was mentioned here before. Only wiring diagrams I can find for my year are for a 302 fure injected.