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  #1  
Old 07-16-2010, 08:20 PM
Mbuchanon19 Mbuchanon19 is offline
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1978 ignition module replacement

hey guys ive got a 1978 f100 lariat 302. lately ive been having trouble dying and stalling and its not my carb or overheating. ive been told its more then likely my ignition module. i was wondering if anybody knew a place to get a pretty reliable one because ive heard these aftermarket ones arent very good at all. also if they just go out like people say they do is there a way to bypass the module? to be honest i dont know much about the functions of it or if there is an alternative to having one besides having efi or anything like that.
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Old 07-16-2010, 08:29 PM
montana_highboy montana_highboy is offline
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Do yourself a favor and buy a genuine Motorcraft module, it will cost more up front but will pay for itself overtime when compared to the cheap overseas modules, if you do buy an off brand module buy two and keep one under the seat they tend to fail at the most inopportune time.
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Old 07-16-2010, 08:58 PM
Mbuchanon19 Mbuchanon19 is offline
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do you know the average lifespan of the motorcraft modules?
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Old 07-16-2010, 09:01 PM
jade79 jade79 is offline
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Quote:
Originally Posted by montana_highboy View Post
Do yourself a favor and buy a genuine Motorcraft module, it will cost more up front but will pay for itself overtime when compared to the cheap overseas modules, if you do buy an off brand module buy two and keep one under the seat they tend to fail at the most inopportune time.
I agree. I've also had good luck with NAPA's premium line.

Also, check the wires inside the distributor where they connect to the pickup coil. Mine had deteriorated from engine heat and broke off, making intermittent contact causing similar symptoms of a bad module.
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Old 07-16-2010, 10:24 PM
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smokeyb97 smokeyb97 is offline
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Quote:
Originally Posted by Mbuchanon19 View Post
do you know the average lifespan of the motorcraft modules?
I don't know, but mine is the original module.
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1979 F100 Ranger, 351M/408c.i., Tmeyer pistons and eng. kit
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Old 07-16-2010, 10:54 PM
montana_highboy montana_highboy is offline
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I don't know, but mine is the original module.
If that's not a testament i don't know what is lol.
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Old 07-17-2010, 12:41 AM
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If that's not a testament i don't know what is lol.
I've been lucky I guess, thought about getting a cheap one and putting it inside behind the seat, just in case.
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1979 F100 Ranger, 351M/408c.i., Tmeyer pistons and eng. kit
Engine work by Performance Specialties Inc., B'ham, Al.
C6 by Performance Torque Converters, Muscle Shoals, Al.
Engine Dyno'd - 339HP@4300rpm, 478FT/LBS@2900rpm
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Old 07-17-2010, 10:07 PM
Mbuchanon19 Mbuchanon19 is offline
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thanks all really appreciate the advice
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Old 07-18-2010, 10:38 AM
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Replacement off-brand modules are reverse-engineered from the original, and can fail quickly. It's not uncommon for the original module to last 25 years. I too have had good luck with Napa modules.
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Old 07-18-2010, 05:31 PM
Mbuchanon19 Mbuchanon19 is offline
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one more question, the one on there right now is some off brand made in china module and i cant tell what kind or a seriel number. on summit they have like 8 motorcraft modules and on the motorcraft website they have two is the dy983 the one i need for a 78?
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Old 07-18-2010, 05:46 PM
montana_highboy montana_highboy is offline
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the motorcraft website they have two is the dy983 the one i need for a 78?
My search shows it as a DY-893.
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Old 07-18-2010, 06:35 PM
Mbuchanon19 Mbuchanon19 is offline
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sry typo dy893* yeah thats what mine says too
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Old 07-18-2010, 06:35 PM
 
 
 
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