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No spark at plugs?

Tiny
NORTHUPZCHARLES
  • MEMBER
  • 2001 FORD F-150
  • 4.2L
  • V6
  • 2WD
  • MANUAL
  • 255,000 MILES
No spark after installing rebuilt engine but have power to new coil with key on but no connection to 3 negatives on coil plug when I crank it over.
Friday, January 10th, 2020 AT 6:45 AM

25 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

With the key on, you should have power to the positive side of the coil. You should also have power to the negative side as well. If you do not, replace the coil.

This guide can help us

https://www.2carpros.com/articles/how-to-test-an-ignition-system

Check out the diagrams (Below). Please let us know what you find. We are interested to see what it is.
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Friday, January 10th, 2020 AT 7:10 AM
Tiny
CHEVYYTHUNDER86
  • MEMBER
  • 2 POSTS
  • 2001 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 71,000 MILES
I changed the motor on my 01. It is a 5.4 L. My theft is flashing. And I am not getting power to my fuel pump or any spark is there a way to reset the theft or to bypass it?
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
CRZYDRVR
  • MEMBER
  • 432 POSTS
You will have to re-learn the key for the PATS to reconize the key.
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
CHEVYYTHUNDER86
  • MEMBER
  • 2 POSTS
You guys responed to my? What info do you need to re learn the key thank u very much
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
CRZYDRVR
  • MEMBER
  • 432 POSTS
Look in the owners manual. It probably is located in there as well.
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
XTREMECLASS
  • MEMBER
  • 3 POSTS
  • 1999 FORD F-150
Electrical problem
1999 Ford F150 V8 Two Wheel Drive Automatic

i have no spark at the 2 modules under the hood I have replaced one of the spark plug modules already and I still can't seem to get spark. I have tested the fuel system the pump is priming and the fuel rails have fuel in it. Was wondering what the next step is or where to go
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Are you refering to the coils? Are you getting power to them? Has the check engine light come on? Crank sensor?

Let me know.
Joe
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
XTREMECLASS
  • MEMBER
  • 3 POSTS
Yes I replaced one of the coils still no spark I have no check engine light on the truck worked fine yesterday and this morning would not fire up
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
XTREMECLASS
  • MEMBER
  • 3 POSTS
Also how would I check to see if there is power there
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
If you have a basic volt meter, just put one side to ground and the other to the wiring going to the coil.
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
ROBBIEMIFF
  • MEMBER
  • 2 POSTS
  • 1997 FORD F-150
  • 4.6L
  • V8
  • 4WD
  • AUTOMATIC
The truck cranks but wont start. Theres no spark to the coils and no fuel. Changed the cranksensor and I checked all the fuses and battery and I even checked the computer it looks fine. Please help
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
ROBBIEMIFF
  • MEMBER
  • 2 POSTS
Should also mention the check engine light wont come one with key is turned over.
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Under the hood is in the relay box is an EEC relay. If bad, it will shut down fuel and spark. Switch it with a known good one with the same part number and see if things change.
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Wednesday, October 14th, 2020 AT 1:58 PM (Merged)
Tiny
WILLIE1111
  • MEMBER
  • 2 POSTS
  • 1997 FORD F-150
  • 21,000 MILES
I have 97 f150 4x4 5 speed getting no fuel or spark changed crank sensor checked fuses what should I check next parked truck two hours later would not start it will crank but not start
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Spray some starting fluid into the air filter and see if it tries to start.

You need to check the fuel pressure, remove one of the coils and put a plug on the end and see if it sparks.

Roy
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)
Tiny
WILLIE1111
  • MEMBER
  • 2 POSTS
No fuel at fuel rails and already checked for spark the way you instructed
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You need to check for power to the pump. The inertia switch is in the right front kick panel. Current will last 2 seconds when the key is on. Verify that power.

Check the fuses with a test light to verify all powers to the pcm.

Roy
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)
Tiny
KIVISTO12
  • MEMBER
  • 1 POST
  • 1997 FORD F-150
Electrical problem
1997 Ford F150 6 cyl Two Wheel Drive Automatic 65 000 miles

We just bought a 97 Ford F150 a few months ago and since it has gotten colder and a bit damper, the truck has started on some days and not on others. Most recently it won't start at all. We've checked the relays and replaced them, and put a new coil in, but still no start. Any suggestions on what needs to be done?
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)
Tiny
BLACKOP555
  • MECHANIC
  • 10,371 POSTS
Well your saying no spark is getting to the distributor? Or you saying no spark is coming from the coil.

Does it fire up with starting fluid sprayed in the throttle body.
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)
Tiny
MATT PETERS
  • MEMBER
  • 3 POSTS
  • 1995 FORD F-150
  • 5.0L
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
The truck ran when I parked it. I sprayed brake cleaner on driver side valve cover because it was rusty and was going to patch up. After the brake cleaner rinsed off with water hose did not spray at full force just rinse off to clean up. Waited for a few days to make sure everything was dry. Did what I had to do the next day did not start. I replaced coil, control module, cap rotor. Sprayed electric cleaner on connectors dryer out with air hose and still nothing. Any suggestions?
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Wednesday, October 14th, 2020 AT 1:59 PM (Merged)

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