No spark
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Junior User
Joined: Jan 2009
Posts: 53
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From: South Carolina
No spark
My 1984 f150,4.9 was running smooth down the road yesterday and then just suddenly shut off. Like toe tag dead. Thought maybe clogged fuel filter so replaced them all. No joy. Replaced dist cap, rotor, and even the coil. Still no spark. Engine turns great, fuel is flowing, just no spark... Any ideas.. Thanks
Moderator
Joined: Dec 2007
Posts: 7,987
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From: Boise, Idaho
You can pull the ignition module out and take it down to a parts store. They can check them for free.
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Cranky Old Guy
Joined: Mar 2008
Posts: 3,562
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From: Raphine, Virginia
Your choice, buy parts and maybe fix it or troubleshoot it. I'd verify you are getting voltage to coil in start and run position first.
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Thread Starter
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Junior User
Joined: Jan 2009
Posts: 53
Likes: 0
From: South Carolina
Yep, Ignition Module was the problem. It pays to trouble shoot. Replaced rotor, coil, distro cap and even before all that...fuel filters... I would advise any rookies to old ford trucks ,like me, that the Ignition Module is fairly cheap... 20.00$ or so at O reilley's... BUT while your in there go ahead and get the "special tool" to get the damn thing off. It is basically a 7/32 deep socket that is specially made to reach inside the deep holes holding the module on. No, all standard SAE sockets will not work because they are too fat to fit inside the deep holes. From there I would advise connecting the bottom front bolt first (the one closest to the radiator) and then the rear top bolt last.
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Junior User
Joined: Jan 2009
Posts: 53
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From: South Carolina
http://i1262.photobucket.com/albums/...an1721/ICM.jpg
Mr. Lurch; I tried to send these to you but had no luck.
Mr. Lurch; I tried to send these to you but had no luck.
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Junior User
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From: South Carolina
New User
Joined: Jul 2012
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I just had the same problem as described above with my 93 econoline. I didn't buy a ton of parts to start replacing though.... I pulled the distributor and the rotor is not turning. Being new to ford I thought timing chain, O CRAP! But the more I read and investigate I guess these model engines do not have timing chains.... Anyone ever seen this before and also I can not turn the rotor by hand either. Please help....
Cargo Master
Joined: Mar 2008
Posts: 2,573
Likes: 207
From: Washington
I just had the same problem as described above with my 93 econoline. I didn't buy a ton of parts to start replacing though.... I pulled the distributor and the rotor is not turning. Being new to ford I thought timing chain, O CRAP! But the more I read and investigate I guess these model engines do not have timing chains.... Anyone ever seen this before and also I can not turn the rotor by hand either. Please help....
When this happened to me I could turn the rotor very easy by hand. You will still need to remove the distributor and look closely at the roll pin/shear pin on the Distributor gear to see what is going on.
Be carefull, my distributor gear is still in the bottom of the oil pan.
Jim