Should I replace my coil?
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Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
Should I replace my coil?
What do you think about replacing the coil on a truck with 90,000 miles. Seems to me that the original can't be as good as new after all that. Truck runs great, but seems to take a bit longer to start up than it should. Battery is good, recently tuned up and new plug wires, etc. I am not looking for some super coil, just a Motorcraft replacement.
INLINE SIX POWER!
300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
INLINE SIX POWER!
300 Cubic Inches of Low RPM Truck Torque! And twin-I-beams too!
"Drive a stick young man! There'll be time for automatics when you're old and unable."
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Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
Should I replace my coil?
Ignition Coil:
Ford Dealer: $82 (Motorcraft)
Quality Parts Store: $53 (Standard)
Murrays Discount Auto: $20 (Wells)
Autozone: $20 (Wells)
If I do it, it probably will be the Standard and certainly won't be the Wells. I asked the guy at Autozone why the dealer would be four times higher, noting it couldn't all be markup. The guy said he didn't know, but that maybe the dealer has a "more better" part.
Ford Dealer: $82 (Motorcraft)
Quality Parts Store: $53 (Standard)
Murrays Discount Auto: $20 (Wells)
Autozone: $20 (Wells)
If I do it, it probably will be the Standard and certainly won't be the Wells. I asked the guy at Autozone why the dealer would be four times higher, noting it couldn't all be markup. The guy said he didn't know, but that maybe the dealer has a "more better" part.
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Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
Should I replace my coil?
>Quality Parts Store: $53 (Standard)
Whoops. Not the name of the place. Can't remember, but it is one of those traditional auto parts stores like from before the times of discount chain auto parts stores.
Whoops. Not the name of the place. Can't remember, but it is one of those traditional auto parts stores like from before the times of discount chain auto parts stores.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Should I replace my coil?
What about NOS? Sitting on a shelf shouldn't hurt these things, should it? It's just an autotransformer soaking in oil after all.
Near as I can tell, my 64 went through one of the 15 dollar specials in about 12,000 miles. I shoulda known better. They can get intermittent when hot (a gazillion turns of very fine wire in the secondary HT) which means they work long enough to get you stranded somewhere.
Keep 'er between the ditches.
Near as I can tell, my 64 went through one of the 15 dollar specials in about 12,000 miles. I shoulda known better. They can get intermittent when hot (a gazillion turns of very fine wire in the secondary HT) which means they work long enough to get you stranded somewhere.
Keep 'er between the ditches.
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Post Fiend
Joined: Jan 2000
Posts: 5,860
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From: Metro Detroit (Redford)
Should I replace my coil?
>What about NOS?
At first glance I thought you were going to recommend I could do more for my truck with a nitrous kit!
However, I forgot what NOS means.
At first glance I thought you were going to recommend I could do more for my truck with a nitrous kit!
However, I forgot what NOS means.FTE Stories
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Post Fiend
Joined: Apr 2002
Posts: 7,157
Likes: 1
From: Central Kali
Should I replace my coil?
I like to mount the coil on the inner fender away from engine heat. Maybe this is why I never had any coil failures. I have an old Sun coil tester sitting on a shelf. Think it was designed to heat up the coil and check output with a set of motor driven points.
New User
Joined: Jul 2002
Posts: 11
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From: potrland usa
Should I replace my coil?
I recommend replacing it with a good quality one from a part store, even if it isn't bad. I just did one on my 391 F-600. The old one was cracked and had a resistence of 2.4 megs ohms on the coil tower to the + side. Needless to say it didn't start up till it was replaced! The correct resistence reading on a basic coil is 1 to 2 ohms on the measurement between the + positive and - negative terminals.
While the reading between either of those two and the tower to cap wire plugin, resistence should read about 2 to 4 ohms maybe 6 ohms if there is an internal resister built into it. If there is a higher reading (or an open-no reading), you will get an attenuated spark or less than the 25-30,000 volts you need to have efficient combustion for a typical standard compression engine.
Keepem rollin!
Rob: 1969 F-600 391, 4-SPD, pto/hydrolic, Dualies, flatbed, old farm truck land barge
While the reading between either of those two and the tower to cap wire plugin, resistence should read about 2 to 4 ohms maybe 6 ohms if there is an internal resister built into it. If there is a higher reading (or an open-no reading), you will get an attenuated spark or less than the 25-30,000 volts you need to have efficient combustion for a typical standard compression engine.
Keepem rollin!
Rob: 1969 F-600 391, 4-SPD, pto/hydrolic, Dualies, flatbed, old farm truck land barge
Senior User
Joined: Nov 1999
Posts: 205
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Should I replace my coil?
What about a Direct Replacment MSD Blaster Coil?? Summit has them for just at $45 (pt#MSD-8227) and AUTOPZONE has them for $59
Just a thought, Thats the one im getting when i order my Wires.
Just a thought, Thats the one im getting when i order my Wires.
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Post Fiend
Joined: Jan 2000
Posts: 5,860
Likes: 4
From: Metro Detroit (Redford)
Should I replace my coil?
Thanks, Guess the first thing I should do is get my ohm meter out and see what is going on with the original coil. If I need one, the Standard sounds like a good bet, thought the blaster is about the same $$$ for me.
And does anybody know what NOS really means? I know it stands for nitrous (brand name?) but also has something to do (I think) with standard or original equipment parts or something like that?
And does anybody know what NOS really means? I know it stands for nitrous (brand name?) but also has something to do (I think) with standard or original equipment parts or something like that?
Fleet Mechanic
Joined: Feb 2001
Posts: 1,290
Likes: 15
From: Toronto, Canada
Should I replace my coil?
>And does anybody know what NOS really means? I know it
>stands for nitrous (brand name?) but also has something to
>do (I think) with standard or original equipment parts or
>something like that?
New Old Stock
>stands for nitrous (brand name?) but also has something to
>do (I think) with standard or original equipment parts or
>something like that?
New Old Stock
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