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Discussion Starter #1
for those of you using these plugs has anyone had any problems with them?

on occasion I get a sputter at idle or taking off from a stop and a few times the engine chugs and stalls while idling. other things but just wanted to know. on my PT Cruiser w/turbo it ran worse with high performance plugs
 

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There are 2 different types of Iridum plugs, one has the standard service life, the other has a longer service life. Also I found that sometimes the 'replacement " plug is not the same size as the stock one. I got a set of 'long life plugs' that measured shorter tha the stock ones when I measured the thread length which would put the electrode substantially up into the head and (in my opinion) affect performance. Yet they were listed as a direct replacement. I didn't use them and got a set that matched the stock ones.

Also, there could be other systems that can affect spark such as coils, and computers that might not support the requirements of a 'performance plug' normally the manufacturer of the car will not reccomend them, and the plug manufacturer will not list that car in their applicaton chart. If they are not listed, it is not a god idea to use the crossover chart to put them in anyhow.
 

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Discussion Starter #3
thanks Jim, I may just change them and see what happens....whenever I get gutsy enough to do it. The last plug on the right took me over 1.5 hours to change it because the "s" shaped hose was blocking the ratchet so I gave up and slit it so I could slide it off.
 

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When you install the new plugs, you will need to remove the inside retainer that holds onto the plug. If not, the extension will come off and leave the socket inside the head on the plug. I usually use a piece of tubing on the plug to get it started in the head first. If it doesn't thread in straight, it will slip on the tubing before it damages the aluminum head threads.
 
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