spark plug miss
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Joined: Oct 2007
Posts: 87
Likes: 1
From: Davenport Iowa
spark plug miss
Is there a easy way to find which cylinder has a miss, changed wires 60 days ago no miss rebuilt carb starts easily idles good but has a noticible miss when its in gear and on accelaration. engine is stock L48 with headers.
Race Director
Joined: May 2006
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Do you have wires 5 and 7 properly separated from one another? Using an insulated plier you can try pulling one plug boot at a time till you find a cylinder that has no negative effect on the idle quality.
Race Director
Joined: Apr 2011
Posts: 11,183
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From: North of Toronto - Ontario
I use an IR gun also but you can always drop some water on the manifold/header of the hot engine and the water will dry quickest on the ones working, slower on one that isn't (or touch them on the cold engine start as above)
Le Mans Master
Joined: Apr 2011
Posts: 6,284
Likes: 1,171
From: Hermosa
I used an IR temp gun to find a bad spark plug.Took temp readings one cylinder at a time,found one was cooler than the rest.Changed the spark plug and all was good.....
I just put a timing light inductive pickup on each spark plug wire in turn - if the light's not producing a steady flash against your hand...that's the one.
