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Old Apr 23, 2005 | 04:16 PM
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From: ma
lost spark?

i have lost spark in my 87 f 150 with the 300 ive replaced the coil the modual and the ecu what else should i check and or replace
 
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Old Apr 23, 2005 | 05:41 PM
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mhg
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From: savannah,ga
QUIT throwing parts at it and start testing
to locate the problem
volt-ohm meter and a good manual
 
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Old Apr 23, 2005 | 05:43 PM
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i have yet to pay for a part so its not like i was spending money on the parts but im horrible with wiring so is there any ideas were i should start
 
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Old Apr 23, 2005 | 05:48 PM
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I would say to check for 12 volts at the coil with the key on first.Do this by unplugging the coil with the key off,then turn the key on and check for 12v at the connector
 
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Old Apr 24, 2005 | 10:01 PM
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From: ma
ttt please i need help
 
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Old Apr 24, 2005 | 10:06 PM
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Ask away,,,
 
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Old Apr 24, 2005 | 11:33 PM
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Check or replace ($20)the EEC ( electronic engine control ) relay, it supplies power to the computer. If the relay has high resistance contacts and lets less than 10 Volts go to the computer you will get no spark. Been there done that-- after the truck I just bought used, wouldn't start or suddenly quit and wouldn't restart, I finally found ( after weeks of hunting) the relay had water in it ( a metal shelled relay) most likely because the dealer I bought it (The truck) from had steam cleaned the engine compartment. In the field service business you find one way to test suspected relays is the "bang on them " method using a screwdriver handle. I did this while the engine was running and the RPM drastically changed and then the engine died. Replaced it and cut open the old one to find rusted contacts and water. The wife has a Ford also and the same started to happen to her( couldn't restart the engine ) sure enough the EEC contacts in the power module were bad.

stractor
 

Last edited by stractor; Apr 24, 2005 at 11:40 PM.
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Old Apr 24, 2005 | 11:35 PM
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From: ma
were is the eec relay
 
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Old Apr 24, 2005 | 11:43 PM
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From: Saddle Brook United State
On a 90 it is on the drivers side fender apron, and it is a metal shelled single Grey relay. On a 93 Taurus it is part of a module. Look on a wiring diagram and see if it is separate.

stractor
 
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Old Apr 25, 2005 | 01:24 PM
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From: ma
i tested for power at the coil today it has power at the coil so what does that rule out does it mean that the ecu is good or that the eec relay is ok

sorry for all the questions im just really bad with wiring and all this stuff
 
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Old Apr 25, 2005 | 02:32 PM
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From: ma
anyone????
 
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Old Apr 25, 2005 | 03:26 PM
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From: Broken Arrow, OK
Did you check for spark at a plug wire or at the coil?
 
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Old Apr 25, 2005 | 06:03 PM
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From: ma
i checked for spark at the wire and for power at the coil
 
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Old Apr 25, 2005 | 10:41 PM
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change that reley then you will know. they can work once in a while and not all the time it is good to have a spare any way
 
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Old Apr 26, 2005 | 12:13 AM
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From: Saddle Brook United State
Does the rotor turn when the engine is cranked ?? or can you turn the rotor by hand??? Fords sixes have been known to shear the distributor drive gear roll pin, that holds the gear to the dist shaft. Is the rotor or cap any good???

stractor
 
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