Ignition no spark output?

Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
I think there may be a issue with the computer tryign to overadvance, and the hot engien will never start you can try to retard the timing manually a few degrees that way it wont advance so much when hot, does this help?

By disconnecting the spout the computer reverts to base timing and starts.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
FARMACIST
  • MEMBER
  • 3 POSTS
Sorry it has been a while, things have been crazy in my neck of the woods! I tried the timing trick, with no luck really. I have a pretty heavy relay, I think I might put that in line with the timing spout, while getting power from the coil (so that the spout is disconected while cranking the starter). I know its not the right way to fix it but it may work for a while!

It does run alot better with the new distributor and all!
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Bypassing the spout when cranking helps the engine start better? Have you checked your igniiton timing?

Make sure your hall effect sensor and the metal trigger wheel is properly set with eachother.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
GCOYLE77
  • MEMBER
  • 1 POST
  • 1987 FORD F-150
  • V8
  • 4WD
  • MANUAL
  • 136,000 MILES
My truck has no spark it ran the other day came home and turned it off hooked up the battery charger for about 20 min came back out and tryied to start it and it woundnt it has no spark took test light and put on coil and had power to both sides and when turned motor over test light flashed on coil but still no spark even tryied new brain box and still nothing can eneyone help me
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
MOPARNUT1393
  • MEMBER
  • 34 POSTS
Take a test light and check to make shure you have a 12volt source going to the coil. If you do then check the power coming out of the coil or replace coil.
If you have spark from the coil to the distributer then check the cap and rotor. Some times the metal tong that transfers power from the middle (coil) lug to the rotor to the pickups that go to the wires can break off or get corroded. Another thing it may be is the magnetic pickup in the distributer which tells the coil to fire. Try a different distributer if one is available
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
VINJFET
  • MEMBER
  • 2 POSTS
  • 1985 FORD F-150
Have an 85 F150 XLT, replaced altenator and coil. Not getting any spark thru distributor. Help me trace it down? Does anyone know what it could be?
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
IAMJERRY
  • MEMBER
  • 6 POSTS
I had this problem constantly with my '84. The (rectangular) module which was/is attached to the distributor was placed too close to the engine and gets too hot and malfunctions. Either it will cool off and work for a while or will not work again and it needs to be replaced. I learned to keep an extra one handy as I used it more than my spare tire. Pick up a one or two at a junk yard for about $10.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
VINJFET
  • MEMBER
  • 2 POSTS
Thank you, that was the problem.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
CLERMONTRANDY
  • MEMBER
  • 7 POSTS
  • 1985 FORD F-150
Electrical problem
1985 Ford F150 V8 Two Wheel Drive Automatic? Miles

I just put in another 302 in my truck, it has new alternator, starter, relay, distributor, cap, rotor, points, plug wires, and coil. I had it running ok, and went to test drive it, I found a small leak in the brake line, repaired it, and went to start it in the morning for a test drive, and I have no spark. I bought a new coil, and nothing. I pulled the coil wire out, no spark, no arcing from any wires, spark plug wires too. I did nothing but replace a brake line, and now I have nothing. I checked fuses, ran power direct, what am I missing?
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Ok lets start with the brake fluid leak, where was it? Any wires get wet? Did you have to lean over a fender? Which side?
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
CLERMONTRANDY
  • MEMBER
  • 7 POSTS
It was from the distribution block, to the front DR side wheel, very short, no wires around there.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
If you have a duraspark inition, the module is on that inner fender, check the plug, it may have been knocked loose when you were working on it. If it's TFI, it's on the distrubutor, either way, if it has no spark, pull the module, and have the parts store check it.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
CLERMONTRANDY
  • MEMBER
  • 7 POSTS
Its all simple, points and coil, no electronic ignition. But I will double check everything again.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
What year engine is in this truck? Points went out in 75'! Does it crank but not start? Or seem dead? If it cranks, try another set of points, I have seen them be defective! Or recheck gap/dwell. Check distributor for sideplay of the shaft too.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
CLERMONTRANDY
  • MEMBER
  • 7 POSTS
I am rechecking points today, I chose to go old schoo
l when I put this motor in, didn't want all the electronic hassles.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
TBM817
  • MEMBER
  • 12 POSTS
  • 1985 FORD F-150
  • 170,000 MILES
Friend bought the truck, guy said it just quit running one day. Its a 85 f150 with the 4.9 straight 6. We replaced the ICM and that didn't help then we replaced the ignition coil today and still nothing. I tested it at the coil itself and its not getting any spark at all there so its not the plugs or the cap and rotor. Any ideas what it could be?
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,600 POSTS
Scan for codes and check fuses underhood see if any fusible links by starter relay are burnt up
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
TBM817
  • MEMBER
  • 12 POSTS
It doesn't have a computer on it so I can't check codes, its carburated. And I don't see any fuseable links on it, there's no fusebox under the hood nut all under the dash are ok
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,600 POSTS
Check resistance of pickup coil in dist if not 400-800 ohms replace it. Also like I said in last rely check fusible links at relay by battery they are wired to it they ae gray/orange an dconnect to a red wire and yellow wire also pull the module off the fender well and have it tested. Auto parts can do it.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
ROBINSON08
  • MEMBER
  • 1 POST
  • 1978 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 175,000 MILES
Truck has no spark, replaced cap, rotor, and coil recently
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Wednesday, October 14th, 2020 AT 2:11 PM (Merged)

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