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04-16-2010, 04:43 AM
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#1 | |
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AF Newbie
 Join Date: Nov 2009
Location: toledo, Ohio
Posts: 12
Thanks: 0
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spark plug questions please help!!!
i have a 1998 ssei with some puzzling issues,car began to misfire badly about a week ago so i replaced the the icm and all three coil packs, car continued too miss and make a pinging noise on wide open throttle so i replaced the plugs and wires which fixed the problem but car still coughs around 5000 rpms though, i replaced the plugs which were autolite 104s with autolite double platinum 106's which is a higher heat range, is this ok?? or am i risking knock retard??? Any plugs that would be better for my car??
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04-16-2010, 07:58 AM
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#2 | |
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A990 racer
 Join Date: Mar 2002
Location: Chestertown, New York
Posts: 16,954
Thanks: 25
Thanked 371 Times in 365 Posts
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Re: spark plug questions please help!!!
Denso plats or the proper AC oe plats are the best.
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04-16-2010, 09:13 AM
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#3 | |
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AF Moderator Elite
Join Date: Feb 2005
Location: Gilligan's Island, Florida
Posts: 5,762
Thanks: 83
Thanked 72 Times in 72 Posts
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Re: spark plug questions please help!!!
I currently have NGK TR-6 (stock # 4177), but also used Autolite 605's in my Ultra with 14.5 psi boost with 160 deg stat (warm weather) and have had no problems with either brand. Be sure to check WOT fuel pressure and all vacuum lines & fittings as well as exhaust back pressure. Click Here for my experience with high rpm coughing!
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