Been gone for a while, HARDDDDD start problem
Thread Starter
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Junior User
Joined: Mar 2012
Posts: 86
Likes: 0
From: Keavy, KY
Been gone for a while, HARDDDDD start problem
84 F150, 351W HO. I replaced the fuel pump, plugs, wires, distributor cap.
Problem is, when cold or hot it's having bad hard start issues. When cold, takes about 45 seconds of cranking to get started. When hot, takes about 15-20.
Truck is getting fuel, definitely. When it starts, it runs fine. Idles fine. Just getting it started is the hard part.
Also has a slight miss at idle only. Clears up with any throttle.
And has, over the past month, gotten a habit of randomly shutting off while driving.
I'm not quite sure what it's deal is. But you all have been good at pointing me in the right direction. Any help is appreciated, as always!
Problem is, when cold or hot it's having bad hard start issues. When cold, takes about 45 seconds of cranking to get started. When hot, takes about 15-20.
Truck is getting fuel, definitely. When it starts, it runs fine. Idles fine. Just getting it started is the hard part.
Also has a slight miss at idle only. Clears up with any throttle.
And has, over the past month, gotten a habit of randomly shutting off while driving.
I'm not quite sure what it's deal is. But you all have been good at pointing me in the right direction. Any help is appreciated, as always!
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
I kinda doubt the shutting-off is related to the hard starting but of course I have no way to know for sure.
Can you more explain this "shutting off?" Do the lights & radio & accessories still work but the engine stops running? Does it just stop as if the key were shut off? Or, does it sputter and die like it ran out of gas?
One thing that could cause both problems is the ignition module, you might take it to a parts store and have it tested.
Can you more explain this "shutting off?" Do the lights & radio & accessories still work but the engine stops running? Does it just stop as if the key were shut off? Or, does it sputter and die like it ran out of gas?
One thing that could cause both problems is the ignition module, you might take it to a parts store and have it tested.
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Ignition module would be a good place to start.
Does this truck have the factory carb, or has it been changed?
Does this truck have the factory carb, or has it been changed?
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Thread Starter
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Junior User
Joined: Mar 2012
Posts: 86
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From: Keavy, KY
It had a 4180 but changed to a 4160.
And we checked it just a bit ago. Zero spark. So I'm going to look into a new ignition module.
And we checked it just a bit ago. Zero spark. So I'm going to look into a new ignition module.
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Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
If it still tests good, check out the coil.
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Would have been my next suggestion, if the coil checked out. It's easier to check/change the coil VS the pickup......
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
Yeppers! I tried to change the PIP thinger once, even had a brand-new Motorcraft unit as a replacement. Busted the drive gear getting it off, then cracked the center shaft trying to get it out of the housing. Finally purchased a NOS FoMoCo replacement distributor from eBay after the Cardone reman unit I purchased online was the wrong one for my application. Correct part number on box, wrong part inside.
