97 4.2 Miss
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Junior Member
Joined: May 2009
Posts: 5
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97 4.2 Miss
Thanks to all who helped me on the surge or miss in my 97 4.2 pickup. I had bought it a few months ago, and could not get the miss under load or acceleration fixed. After scouting some posts, I saw where you HAVE to run motorcraft plugs. He had put new ND's in so I just overlooked it. Sure enough, put SP504's in it, and it runs great. This is really a great forum, as you guys helped me out on my 95 last year also. Thanks, Jim
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Thanks to all who helped me on the surge or miss in my 97 4.2 pickup. I had bought it a few months ago, and could not get the miss under load or acceleration fixed. After scouting some posts, I saw where you HAVE to run motorcraft plugs. He had put new ND's in so I just overlooked it. Sure enough, put SP504's in it, and it runs great. This is really a great forum, as you guys helped me out on my 95 last year also. Thanks, Jim
Last edited by jbrew; Mar 5, 2010 at 03:28 PM.
Senior Member
Joined: Jul 2007
Posts: 946
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From: London, ON Canada
The 4.2s are picky on which plugs you use. I've got Autolite Dbl Plats in mine gapped to 0.054 and they run fine. From the research I've done Motorcraft, Autolites, Denso Iridiums should work fine..Bosch 99.9% of the time are total crap in these motors no matter the gap.
