77 truck stops running
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New User
Joined: Mar 2009
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77 truck stops running
1977 f-150 cranks right up and will idol as long as i want, but when i start driving it for about 10 min i will shut off and then will not start. if i give it about an 1hr to sit then it fires right back up and then does the same thing. does any one have any idea?
Elder User
Joined: May 2008
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From: Wasilla, AK
Check the electrical connections on ignition/coil, starter silenoid, and battery terminals. Clean and make sure they are tight, especially grounds. Bad component (as 75F350 said) are loose connection most likely!
Elder User
Joined: May 2008
Posts: 508
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From: Wasilla, AK
Ignition switch wiring in steering column possibly (I don't remember if that year was column are dash switch location) Could be carburater? What engine and carb you got and is it stock?
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351 modified 400
edelblock 600cfm
the ignition is on the dash, i replaced the lock cylinder but not the wiring part.
edelblock 600cfm
the ignition is on the dash, i replaced the lock cylinder but not the wiring part.
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Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
The usual three step scenario of a failing Ford ignition module.
1) Module overheats, engine dies. Module cools down, engine restarts within a few minutes.
2) Module overheats, engine dies. Module cools down, engine restarts in an hour or so.
3) Sooner or later, usually sooner...module overheats...burns out, now the engine will not restart.
Besides the module, inside the dizzy is a stator aka pickup coil...the symptoms can be similar.
Most mechanics replace both at the same time. If the 1977 truck was not sold new in CA, it should have the "blue" module.
1U2Z12A199AA .. Ignition Module (Motorcraft DY893) / 1U2Z12A199AA replaced D9VZ12A199A.
MSRP: $113.62 // FTEpartsguy.com price: $61.36
D4PZ12A112A .. Stator (Motorcraft D1UA)
MSRP: $97.96 // FTEpartsguy.com price: $52.90.
-----------------------------------------------
Problem #2
If the engine bogs down, and/or hesitates from a dead stop or when punching it at speed, the accelerator pump diaphram and check valve need replacing.
This is a very common problem with Ford 2V carbs.
D5AZ9B559A .. Accelerator Pump Diaphram (Motorcraft CM2092) / Note: Fits 1975/79. 1962/74 is not the same.
C4AZ9576A .. Accelerator Pump Check Valve (Motorcraft CM825) / Fits: 1962/79.
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