Ignition problem 74 f-100
New User
Joined: Jul 2003
Posts: 6
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From: Rocky Mountain House, Alberta
Ignition problem 74 f-100
I went to my Ford dealer here in Alberta. I went to get a new ignition box that bolts to the inner fender well. He told me that Ford has discontinued the ignition box for 1974, and 75 and newer wont fit. So I have ordered a after market one and hope to fix my starting problem. One question though. The following suggesitions above these posts talk about a ignition module in or near the distributor that flexes with vacuum. What is that all about and how do I look for it?
Thanks
Thanks
New User
Joined: Jul 2003
Posts: 6
Likes: 0
From: Rocky Mountain House, Alberta
Ignition problem 74 f-100
Well I would like to start by saying thank you to all who responded to my problem. First I changed the box on the fender and that did not help. Then I changed the piece inside the distributor ( that little spring clamp thingy in the center of the distributor is a real pain ). And then success, the truck once a again runs like a dream.
Inside of the drivers door is all the information about the truck. It was made on ( 07 / 74 ). Is it a '74 or '75?
Thanks Again
Inside of the drivers door is all the information about the truck. It was made on ( 07 / 74 ). Is it a '74 or '75?
Thanks Again
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Ignition problem 74 f-100
One of the last 74's.
Eric, We don't have Motorcraft dealers here isn Alberta anyway.
We used to have two of them in Calgary & 1 in Edmonton.
I really miss buying Motorcraft at Wholesale pricing
All the Motorcraft stuff is available from a dealer.
Eric, We don't have Motorcraft dealers here isn Alberta anyway.
We used to have two of them in Calgary & 1 in Edmonton.
I really miss buying Motorcraft at Wholesale pricing
All the Motorcraft stuff is available from a dealer.
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Ignition problem 74 f-100
The Oreilley parts store around the corner has the Motorcraft units for $75 or $44. I would have to call them to check the reason for the price difference. You can get some aftermarket cheapies for as little as $16. The high $$ Lifetime Borg Warner modules will last about a year. I was going to check on the BW price but the Oreilley web site seems to have crashed.
I get my MotorCraft units from the salvage yard for $2 (some free) or from scrapping out vehicles, and test them at the local store. I have tested enuf modules they let me test my own unless I run into a nube there. I haven't found a bad Motorcraft DS unit yet. I can't say that about their TFI units.
I get my MotorCraft units from the salvage yard for $2 (some free) or from scrapping out vehicles, and test them at the local store. I have tested enuf modules they let me test my own unless I run into a nube there. I haven't found a bad Motorcraft DS unit yet. I can't say that about their TFI units.
Thread Starter
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New User
Joined: Jul 2003
Posts: 8
Likes: 0
Ignition problem 74 f-100
I have replaced the ignition module,Distributor, Carb,re did a lot of the wiring new plugs and wires and she stil has a miss under a load and won't run with the vacuum advance connected. In the middle of the vac line there is a little green circle type thing does any body know what I ;m talking about? If you do is there a chance that could be bad. I need all the Ideas I can get I can't afford a mechanic and I need the truck for work.
Thanks
Thanks
Posting Legend
Joined: Sep 2001
Posts: 30,255
Likes: 37
Ignition problem 74 f-100
You may have deeper engine problems. You might want to check in your engine forum.
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New User
Joined: Aug 2003
Posts: 3
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Ignition problem 74 f-100
There is a pickup module inside the distrubutor with wires that flex every time you move the throttle
I want to change that... which part is it? I have no spark. Changed the "box" and voltage reg.
I have removed the dist. and taken the top apart. Down under the plate I see some stuff that has springy things and looks like it moves under centrifical force. Is this what we're talking about?
I should explain more... truck used to start and run sometimes just fine, other times it wouldn't start at all. Sometimes it would just quit out on the road... later I go back and it starts fine and I drive it home.
Now it just doesn't start... no spark, am I on the right track?
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Ignition problem 74 f-100
I want to change that... which part is it? I have no spark. Changed the "box" and voltage reg.
I have removed the dist. and taken the top apart. Down under the plate I see some stuff that has springy things and looks like it moves under centrifical force. Is this what we're talking about?
No that isn't what we are talking about.
The part we are talking about is that thing just inside & on the side of distributor body that thing under the rotor with 8 vanes on it goes by.
I should explain more... truck used to start and run sometimes just fine, other times it wouldn't start at all. Sometimes it would just quit out on the road... later I go back and it starts fine and I drive it home.
Annoying isn't it? This tell me it might be a coil,connection, or a heat activated problem.
Now it just doesn't start... no spark, am I on the right track?
I have removed the dist. and taken the top apart. Down under the plate I see some stuff that has springy things and looks like it moves under centrifical force. Is this what we're talking about?
No that isn't what we are talking about.
The part we are talking about is that thing just inside & on the side of distributor body that thing under the rotor with 8 vanes on it goes by.
I should explain more... truck used to start and run sometimes just fine, other times it wouldn't start at all. Sometimes it would just quit out on the road... later I go back and it starts fine and I drive it home.
Annoying isn't it? This tell me it might be a coil,connection, or a heat activated problem.
Now it just doesn't start... no spark, am I on the right track?
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