Testing an ignition coil
Thread Starter
5 Year Member
Joined: Feb 2015
Posts: 258
Likes: 18
All plugs and coils are less than 10 thou Motorcraft and new Bosch injectors.
I did notice the connector on the coil has lost its clip and now just slides on.
Ill run the motor this weekend and apply a bit of pressure with a wooden dowel to see if that makes a difference.
I did notice the connector on the coil has lost its clip and now just slides on.
Ill run the motor this weekend and apply a bit of pressure with a wooden dowel to see if that makes a difference.
98 F150 5.4L E40D/4R100
Joined: Nov 2006
Posts: 28,519
Likes: 7,630
From: MI
All plugs and coils are less than 10 thou Motorcraft and new Bosch injectors.
I did notice the connector on the coil has lost its clip and now just slides on.
Ill run the motor this weekend and apply a bit of pressure with a wooden dowel to see if that makes a difference.
I did notice the connector on the coil has lost its clip and now just slides on.
Ill run the motor this weekend and apply a bit of pressure with a wooden dowel to see if that makes a difference.
5 Year Member
Joined: May 2015
Posts: 4,175
Likes: 1,206
Well I replaced all mine with Motorcraft not really that long ago and it started misfiring then it would clear up . Now I have a P0308 code and of course it`s number 8 .
Just thought the good ones should last longer. I`m hitting the junk yard tomorrow to dig up a Motorcraft coil just to see if it fixes it then I`ll buy a new one.
Just thought the good ones should last longer. I`m hitting the junk yard tomorrow to dig up a Motorcraft coil just to see if it fixes it then I`ll buy a new one.
But......
A lean cyl or wide plug gap will cause high voltage spike on secondary that might seriously shorten their life.
