Problem with Iridium plugs
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Intermediate
Joined: Feb 2013
Posts: 49
Likes: 0
From: SoCal
Problem with Iridium plugs
I put some Iridium plugs in my 94 springer and it ran rough. It even seemed to miss on acceleration every now and then.
I put my old plugs back in and it runs great
Has anyone had this problem before?
I put my old plugs back in and it runs great
Has anyone had this problem before?
Road Warrior
Joined: Nov 2010
Posts: 1,870
Likes: 4
From: Jacksonville, FL
Have to ask... are you sure the gap was set properly?
Seasoned HDF Member
Joined: Aug 2011
Posts: 11,814
Likes: 5,120
From: SW Ohio
The only thing that comes to my mind is iridium plugs seem to perform best with coil on plug systems. I don't know if your bike has a conventional coil system but if it does, that could account for the trouble.
Last edited by Campy Roadie; Mar 23, 2013 at 07:24 AM.
Road Warrior
Joined: May 2010
Posts: 1,593
Likes: 11
From: Mass/NH
Just thought of something...I wonder if the new plugs could be mis firing because of bad wires??? A buddy of mine had a bad experience with new wires, blaming the wires...it ended up he did not SEAT the ends of the wires to the BOTTOM of the connection holes, which caused them to arc...easy fix, pain to figure out. Bad wires might cause similar results. I have had bad wires in the past that looked fine...right up until there was any moisture in the air...doa.
Last edited by Rodzilla6; Mar 23, 2013 at 07:08 AM.
Intermediate
Joined: Jan 2013
Posts: 35
Likes: 1
From: SE Wisconsin
I've had brand new, standard spark plugs be no good right out of the box. I can't think of any reason that the same thing couldn't happen with the Iridium plugs
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Road Warrior
Joined: Nov 2010
Posts: 1,870
Likes: 4
From: Jacksonville, FL
They come gapped already.
It only takes a second per plug, do it the correct way the 1st time.... all the time!
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Advanced
Joined: Jul 2012
Posts: 84
Likes: 2
From: South Vienna, Ohio
I've installed hundreds of Iridium plugs and never gapped them. They even tell you not to because of electrode damage.
Iridium plugs are also intended for high output coil on plug and SPFI fuel systems. It only takes a little bit of excess unburned gas to make them miss.
And once the plug starts missing throw it away.
Iridium plugs are also intended for high output coil on plug and SPFI fuel systems. It only takes a little bit of excess unburned gas to make them miss.
And once the plug starts missing throw it away.