iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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Here we go again changed the spark plugs to the ZFR6FIX-11 Iridium NGK spark plug and yet again miss fires ... but
it only mis fires where giving some beans. if i rev it slowly there is no misfire at all but as soon as i give it half throttle or more it will misfire from 3.5k upwards
I called ngk during the week as i ordered the BKR6EKIX iridium plugs but they where for an 8v/16v cally and they reccommended the ZFR6FIX-11. Funny thing is that when i put the only Bosche Super 4's backin there is no missfire nothing .
The reason im changing is that ive been told to run a cooler plug, i was told this by power engineering when i had my check over and power run.
Has anyone else come across this or something similar? The gapping on the plugs is around 1.1mm i think if my memory is correct.
Help please
Stu
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johnny27
Member
Registered: 5th Feb 06
User status: Offline
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are u sure its the spark plugs thats are causing the miss fire? could be loads of other things, dizzy/diz pack, coil/coil pack, ht leads?
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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yup coz it runs fine on the bosch super 4's
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Adam_B
Member
Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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the gap is 1.1 mm, on that ngk part number the 11 on the end means pre set to 1.1mm. Odd as NGK are usually spot on.
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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ive been told for high boost turbo's i need .6mm which is a massive difference 
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Adam_B
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Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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yeah 
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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maybe thats why its misfiring on beans then lol
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Adam_B
Member
Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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maybe, if you have some feeler gauges just re-set them and try again.
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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mmm thats something i dont have lol oh better find a grease monkey lol
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Adam_B
Member
Registered: 13th Dec 00
Location: Lancashire
User status: Offline
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there not exspensive, couple of quid from any decent car accessory shop or motorfactors
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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ok might have to go get me a set lol cheers adam 
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Stu_22
Member
Registered: 25th Mar 02
Location: Luton
User status: Offline
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I'm just getting inot the turbo seen with an old supra and most of the top power people on the supra forum dont like the iridium plugs for high boost engines.
They last longer but cant handle the heat as well. They recomend standard copper core ones
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J100RSA
Member
Registered: 4th Mar 01
Location: Thornhill, West Yorkshire
User status: Offline
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u2u'd
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iceman
Member
Registered: 22nd Jul 00
Location: Berkshire
User status: Offline
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u2u'd bak j100rsa
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