1995 Ford F-150 No Spark, intermitent

Tiny
ZPAINE
  • MEMBER
  • 1995 FORD F-150
  • 6 CYL
  • 4WD
  • MANUAL
  • 179,000 MILES
Shortly after buy the truck, I had a no spark issue, only died once. If it started it would drive anywhere. But sometimes it wouldn't start, becoming more frequent until I can no longer drive it. When there is no spark there is no power to coil. Coil distributor, icm, coil, computer, ignition switch, and the voltage regulator are all new. Any ideas?
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Thursday, September 2nd, 2010 AT 9:03 PM

16 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Has the check engine light come on?
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Friday, September 3rd, 2010 AT 8:06 AM
Tiny
ZPAINE
  • MEMBER
Nope
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Monday, September 13th, 2010 AT 9:37 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Try switching the EEC relay with one that has the same part number. Let me know if that changes things.
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Tuesday, September 14th, 2010 AT 7:28 AM
Tiny
ZPAINE
  • MEMBER
Truck ran for about 2 days then nothing, hasn't started for 2 days now, no spark
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Thursday, September 23rd, 2010 AT 7:26 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
First, sorry about the delay in getting back to you. I lost my father this week and things have been.

Did it start running after replacing the EEC or on its own?
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Saturday, September 25th, 2010 AT 1:36 AM
Tiny
ZPAINE
  • MEMBER
On its own
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Saturday, October 2nd, 2010 AT 8:54 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Did you try switching the EEC? If there is no power to anything, then the next step is the PCM because you replaced everything.
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Sunday, October 3rd, 2010 AT 9:31 PM
Tiny
ZPAINE
  • MEMBER
The pcm is the computer that stubs through the fire wall next to the elec. Terminal on the drivers side, thats new, the 2nd one, which leads us to the wiring harness. I've checked every wire for continuity while wiggling the terminals and wires, no loss.
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Monday, October 4th, 2010 AT 10:42 PM
Tiny
ZPAINE
  • MEMBER
I have power everywhere except the coil, but have power with the terminals pulled off the coil. The engine will crank until the battery dies.
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Monday, October 4th, 2010 AT 10:44 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
You lose power to the coil only when it is connected?
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Tuesday, October 5th, 2010 AT 7:37 AM
Tiny
ZPAINE
  • MEMBER
Only when connected, tried swaping it out, same deal
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Tuesday, October 5th, 2010 AT 9:14 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
The supply, (PCM), must not be able to handle the load.
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Wednesday, October 6th, 2010 AT 7:58 AM
Tiny
ZPAINE
  • MEMBER
? Not sure what you mean. Its getting hot or there are a lot of loose/dirty connections, the pcm can not handle it?
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Wednesday, October 6th, 2010 AT 8:42 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Many times an electrical component will register at a normal voltage until a load is placed on it. At that point, if there is a bad connection or the component can't keep up with the load, the voltage drops.
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Thursday, October 7th, 2010 AT 1:15 PM
Tiny
ZPAINE
  • MEMBER
So are we talking about the computer(pcm) in the fire wall, or the icm on the fender wall
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Friday, October 8th, 2010 AT 8:21 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
PCM, but check wiring for corrosion, damage.
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Saturday, October 9th, 2010 AT 12:57 PM

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