Ignition no spark output?

Tiny
DANIELDELAROSA
  • MEMBER
  • 1989 FORD F-150
  • V8
  • 2WD
  • MANUAL
  • 302 MILES
Why isn't there sparks in spark plugs? Replaced coil, spark plug wires, control module on disturbiter, roder, and still no sparks. There is power to coil and to module on disturbiter but not to spark plugs, was told timing but timing is on right.
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Thursday, January 31st, 2008 AT 10:14 PM

48 Replies

Tiny
BLACKOP555
  • EXPERT
Check for spark directly from the ignition coil with a spark tester. This guide can help us

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

Please run down these guides and report back.
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Thursday, September 12th, 2019 AT 12:12 PM
Tiny
BMRFIXIT
  • EXPERT
Check fuses and check them again do you have check engine light when 1st key on did you check fuel pump and pressure you may want to try a new PCM relay on the fender
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Thursday, September 12th, 2019 AT 12:12 PM
Tiny
WILLSIAN
  • MEMBER
  • 1989 FORD F-150
  • V8
  • 2WD
  • AUTOMATIC
  • 153,985 MILES
I have a 1989 ford f 150 put new plugs, wires, distributor cap, and the rotar bug it ran good for a day then the next day it started up went a couple miles then it slowly died. Got it home the coil was not getting spark bought a new coil still none so I we bought a distrubitor module and that didnt work can you help me figure it out
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
Check and test the distributor pick-up coil
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
WILLSIAN
  • MEMBER
Thats probably it I didnt think of that but can you tell me how to get that off
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
RASMATAZ
  • EXPERT
Disconnect it and measure the resistance on it and also check it if its shorted to ground
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
WILLSIAN
  • MEMBER
That was it so we got a hole new distributor and it woks thanks for your help.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
94STEPSIDEFORD
  • MEMBER
  • 1988 FORD F-150
I got a 1988 ford f-150 with the 4.9 that just died on me. It is getting fuel but I cant get the coil to sprak. Both terminals on the coil are getting juice(white/ light blue wires, and green/yellow wire) but the coil wont spark. I am aware that it is probaly not getting ground. But don't know where to test for that as there are only 2 wires on the coil and both are hot.

Thanks for any help possible.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
BAREFOOTBOB88
  • MEMBER
I am not totally sure, but I am pretty positive that the coil gets its ground from the casing that mounts it on to the block/ frame. It sounds to me that you have a bad coil. Just because its getting power doesn't mean the coil is fully functioning. Electrical components are funny like that. Make sure that the coil is seated tightly. I will check into this more. I still think if you replaced the coil you would be set.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
NANCYHAYES
  • MEMBER
  • 1988 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 140,000 MILES
I have a 1988 ford f150. Was stalling for a couple of months. The last time it stalled it wouldn't start again. Replaced the distributor cap, rotor button, ignition control module, and the coil. After I put the coil on it started and drove great for 2 days, then stalled again and now won't start. Could it be a computer problem or do you have any idea what to check.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
Has the weather been moist where you live?

Are you plug wires routed properly? You replace the coil with a good quality one or a cheap offbrand? Plug wires on the plugs properly? Too high resistance?
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
  • 1987 FORD F-150
I want you to check spark on all cylinders with a spark tester.

Do all have spark? How bout directly from coil with engine cranking? Get back to me.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
Glad to hear that you have fixed your problem. Make sure you used all of the heat transfer gel you have gotten with the module on the back side. And if you ddint get any be sure to buy some and add it or else the module could overheat and burn up.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
2CARPROS-ARCHIVES
  • MEMBER
Electrical problem
1987 Ford F150 V8 Four Wheel Drive Automatic

Been having problems starting my 87 f150. Thought at first it was a fuel problem so I changed the inline pump, filter, and relay. Sometimes tapping relay would allow it to start. Now nothing I try seems to work.I checked wiring at both tanks and all seems fine there. I pulled the front plug on drivers side and it smelled strongly of gas so I plugged it back into ignition wire rolled it over and no spark. I used my test light and check harness plug on the coil while still plugged in switch on and both lighted up. Now im lost any help would be greatly appreciated
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
2CARPROS-ARCHIVES
  • MEMBER
Problem solved. Was a bad ignitition control module. Thanks evryone for help!
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
BRUCE.BASHAW
  • MEMBER
  • 1987 FORD F-150
Transmission problem
1987 Ford F150 V8 Four Wheel Drive Manual

Truck will turn over for a few seconds then cut off. There is no spark at plugs. All ignition components have been recently replaced.
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
BMRFIXIT
  • EXPERT
With key on should have check engine light on
if not check fuses and PCM relays and connectors

check spark control module
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Wednesday, October 14th, 2020 AT 2:09 PM (Merged)
Tiny
FARMACIST
  • MEMBER
  • 1987 FORD F-150
  • 6 CYL
  • 2WD
  • MANUAL
  • 239,000 MILES
My pickup runs great when cold, however when it gets hot (operating temperature) if it stalls it wont restart for 10 minutes or so until it has time to cool off. I have replaced the ignition coil and tfi module, several relays (various ones just trying to narrow a few things down). Just by chance I discovered if you disconect the timing sprout it will restart. Any ideas?
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
BLACKOP555
  • EXPERT
Hmm, sounds like it could be a badhall effect sensor.

Its like a pickup coil only thing is ford switched to the hall effects in 87.

Check that first. If it feels like tar it is definetely bad.
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)
Tiny
FARMACIST
  • MEMBER
Well I have been at work for the past few days but did get your reply. One day at lunch I stopped by the parts store and found out I could get a new distributor for $100, not bad. Comes with the PIP sensor and a new TFI module, so I sprung for that (figured I may as well change it all just in case!). After work last night I came home droped it in and went for a drive. Still doesnt restart when hot. Its a real head scratcher. I bought the truck cheap, as it had this problem when I got it. But I thought I could fix it. That was 2 years ago
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Wednesday, October 14th, 2020 AT 2:10 PM (Merged)

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