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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

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Old Mar 16, 2010 | 05:20 PM
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no spark

i am working on a 89 f-150 5.0 liter. there is no spark it just died the other day. replaced the coil. just wondering what else it could be. cap and rotor looks fine.thanks for any help
 
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Old Mar 16, 2010 | 06:00 PM
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How do you know you are not getting spark? Have you pulled a plug or installed a spark tester to verify your diagnosis? Does the truck have a tachometer? If it does, it should display some form of RPM reading during the cranking cycle. If there is no reading suspect a bad PIP sensor. It's inside the distributor. You have to pull the distributor to replace it. Many find it easier to get a new distributor.

If you have no tachometer you can try momentarily grounding the negative side of the coil with the key in the ON position, that should cause the coil to fire once. If there is no spark then it could be the Ignition Control Module (ICM).
 
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Old Mar 17, 2010 | 04:44 AM
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+1 What he said.
 
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Old Mar 17, 2010 | 08:23 AM
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i have puuled a plug to test for spark. where is the control module located? it has been running poorly for a while now, but now wont even start.
 
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Old Mar 17, 2010 | 09:27 AM
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I am not 100% sure on your '89. It could be mounted to the distributor or on the driver side fender near the master cylinder like the later model trucks.
 
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Old Mar 18, 2010 | 03:48 AM
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It should be mounted to the distributor. I don't think any of our trucks had the fender mounted one until some time after 92 maybe closer to 94.
 
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Old Mar 18, 2010 | 08:06 AM
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My '92 F350 has the ICM/TFI mounted on the fender
 
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Old Mar 18, 2010 | 08:21 AM
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I believe the non 460 trucks started in 1992 and the 460 had it on the fender in 1990.
But for OP his was on the distributor and that would be where I would look for his problem first.
 
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Old Mar 18, 2010 | 01:41 PM
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thanx guys ecm solved the prob.
 
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Old Mar 18, 2010 | 01:56 PM
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ECM? You changed the power train module? Or the Ignition Control Module (ICM) on the distributor/firewall?
 
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