Transmission Problems? Or Something Else?
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Joined: Jan 2004
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From: SW Va
BTW, since you ended up with a P0301 code clue, would be interesting to know if you found any cracks in the removed coil pack potting, or housing, or signs of carbon tracking electrical break down around, or between the #1 coil tower & the #5 coil tower, or cracks underneath on that end, as both spark plugs share the same coil pack high voltage secondary winding on our waste spark ignition system.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
OK good feedback, so do you suppose it might be ok & the problem might have been caused by the spark plug wires that didn't fit tight on the replacement coil pack???? Maybe consider having the old coil pack bench tested by your favorite auto parts store, perhaps its ok????
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Mountain Pass
Joined: Oct 2009
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I suspected the plug wires. Before I even took it on the first test drive. I took my Dad's coil back off and put my coil back on. I replaced the plug wires that didn't want to fit snug on the coil with my Dad's plug wires. I took it for the first test drive and it acted up.
I came back put my Dad's coil back on and took it for the second test drive and it fixed the problem. I just came back from town and my truck ran great. I am replacing the coil and plug wires (using Motorcraft parts). So I can put my Dad's coil and plug wires back on his truck.
I don't know how to bench test my coil. I don't know if I would even have the tools to do it.
I came back put my Dad's coil back on and took it for the second test drive and it fixed the problem. I just came back from town and my truck ran great. I am replacing the coil and plug wires (using Motorcraft parts). So I can put my Dad's coil and plug wires back on his truck.
I don't know how to bench test my coil. I don't know if I would even have the tools to do it.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
Ok that's good Trouble Shooting & feedback, so sounds like your old coil pack has internal breakdown of some sort.
Most auto parts stores can bench test a coil pack & will do so at no cost.
Have the New coil pack bench tested before leaving the store with it.
Good idea to stay with Motorcraft ignition parts imo.
Most auto parts stores can bench test a coil pack & will do so at no cost.
Have the New coil pack bench tested before leaving the store with it.
Good idea to stay with Motorcraft ignition parts imo.
Moderator
Joined: Jan 2004
Posts: 13,851
Likes: 111
From: SW Va
The coil pack primary doesn't have a resistance specification but it usually measures less than 1 ohm. The secondary windings resistance specification is 13K-15K ohms.
The spark plug wires should measure something like 1K ohm per inch of length, 30K ohms max, no matter the length & the measurement should be steady as the wire & end connections are flexed. So be sure to check all the new plug wires & coil pack before use.
I usually coat the coil pack with CRC heavy duty silicone spray & butter a Thin layer of silicone dielectric grease onto the plugs external insulators & inside both ends of the wire boots, so to help prevent flash-over on those wet dewy morning starts or rainy day drives.
More thoughts for consideration, let us know how it goes.
The spark plug wires should measure something like 1K ohm per inch of length, 30K ohms max, no matter the length & the measurement should be steady as the wire & end connections are flexed. So be sure to check all the new plug wires & coil pack before use.
I usually coat the coil pack with CRC heavy duty silicone spray & butter a Thin layer of silicone dielectric grease onto the plugs external insulators & inside both ends of the wire boots, so to help prevent flash-over on those wet dewy morning starts or rainy day drives.
More thoughts for consideration, let us know how it goes.
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