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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

spark issue

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Old Jun 15, 2015 | 12:23 PM
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spark issue

Im getting power to the top of distributor cap, but nothing coming out of it. What could this problem be?
 
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Old Jun 15, 2015 | 03:08 PM
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From: SoCal 909
just gonna ask it nicely lol ,
You do have a rotor under the cap correct?
 
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Old Jun 15, 2015 | 03:16 PM
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Yeah theres only one possible way to replace this piece. Only one slot for it to slide down into. I didnt do any kind of serious work on it. tune up and it ran perfectly til now. I used bars leak to stop a radiator leak. It ran good for several trips after that. Now this is whats goin on.
 

Last edited by milkcartonkid; Jun 15, 2015 at 03:19 PM. Reason: adding to it
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Old Jun 15, 2015 | 03:38 PM
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From: SoCal 909
What year, make and model? also engine
 
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Old Jun 15, 2015 | 03:45 PM
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Sorry I thought it showed with my profile, the title says 92 but the sticker by the drivers says 91. F250 351w
 
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Old Jun 15, 2015 | 03:49 PM
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From: SoCal 909
Try changing out the rotor for a new one, button could be bad or a bad cap.
 
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Old Jun 15, 2015 | 03:50 PM
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From: SoCal 909
Also when checking for spark, did you use an inline tester or just pull plug, if so, did you ground plug?
 
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Old Jun 15, 2015 | 03:52 PM
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Ill try putting the old cap back on real quick.
 
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Old Jun 15, 2015 | 03:59 PM
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The first way I checked was, I pulled the plug wire off the cap and used my multimeter. Right afterwards I plugged the wire back on the cap. Unplugged it from the spark plug isnerted a screwdriver into the plug and had someone crank it while I held it about 1/8th of an inch from some bare metal on the truck. I got nothing both ways
 
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Old Jun 15, 2015 | 04:07 PM
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From: SoCal 909
Try the old cap and rotor on if you still have it just to see.
 
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Old Jun 15, 2015 | 04:31 PM
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I put on the old cap just to check, still no spark so its sorta discouraging. My fuel pump wont stop priming(dunno how to fix it but im getting great pressure and its getting fuel to the plugs) and no spark, I dont wanna buy an eec if I dont need one but dont know what to do
 
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Old Jun 15, 2015 | 04:34 PM
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From: SoCal 909
Fuel pump should only prime for about 1 +/- sec but that's another issue. Maybe someone else will chime in on the spark issue.
 
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Old Jun 15, 2015 | 04:37 PM
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Anyone know if it could all be connected to the eec? Or icm? It all happened at once so I dont imagine it being two completely seperate issues
 
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Old Jun 15, 2015 | 05:00 PM
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As another member said, the fuel pump should only prime for 2-3 seconds. Is it staying on when the key is turned to the Run position? If it doesn't stop, then you need to pull the PCM.
 
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Old Jun 15, 2015 | 05:07 PM
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Where is that pcm located? It continuously run with key turn to run. It stops when I pull the relay out in the fuse box in the engine compartment.
 
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