79 400 ignition module?
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79 400 ignition module?
Replacing my old ignition module. when i install the new module truck will start fine and run noticeably better. when i shut the truck off i can restart within the first few seconds just fine but if i wait a minute and try to restart it strains to turn over as if the battery was dead or my timing had been altered. I can unplug the two wire red and white plug from the module turn the engine over and then plug it back in and the truck will start normal but if i shut it down the same thing happens. My old box was oozing and just looked like hell so for $30 I got an autozone box i think it's a duralast?
If i plug the old box back in it starts normal every time but doesn't run as well.
I don't have an emission label to get a timing spec so i'm refering to the autozone site for the info. The vin# says it should be a 1979 400 I don't think i can ID the motor with 100% certinty without opening it up.
If i plug the old box back in it starts normal every time but doesn't run as well.
I don't have an emission label to get a timing spec so i'm refering to the autozone site for the info. The vin# says it should be a 1979 400 I don't think i can ID the motor with 100% certinty without opening it up.
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Joined: Aug 2010
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From: virginia
I had a 77 ford thunderbird with a 400m motor and there were 2 different modules that advance auto sold me for the same year and you have to look on the module for the same color mark, its either paint or a plastic strip.
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Yeah, i'm looking at the wire layout and "grommet color" on my new module and wondering about that?
The old and new modules have the same color wires but they're in a different order on the module?
I'm not certain the exact year of this motor the truck was put together before I bought it. The guy I bought it from had know idea what he was talking about. He said the motor was a 351m but i see the vin says it should be a 400 unless it's been changed? I've been thru countless online sources that all lead me to the f102 module for all of the 351/400 engines for about all years. Can they test this module?
The old and new modules have the same color wires but they're in a different order on the module?
I'm not certain the exact year of this motor the truck was put together before I bought it. The guy I bought it from had know idea what he was talking about. He said the motor was a 351m but i see the vin says it should be a 400 unless it's been changed? I've been thru countless online sources that all lead me to the f102 module for all of the 351/400 engines for about all years. Can they test this module?
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