Some spark plug questions
Just last night my car started skipping, is sounds like its down 1 cylinder and I can smell unburnt fuel getting to my cat..
I'm going to check, but I'm thinking its actually a fouled plug. I talked to a buddy of mine who is a technician and he told me my car called for a double platinum plug.
I couldn't remember if the TR55s were double platinum or not, does anyone know right off? I told him I knew a lot of guys on here run TR55s so I didn't see any reason not to.
I figure I'm going to get some AC Delco double platinums to put in. BUT... I have a nitrous kit that I'm waiting to put in so I know I'll be wanting a colder plug with a .35 gap. I had been planning on getting some NGK TR6s for that.
It may be a while before I get to the n2o, but would the TR6s make a good plug to daily drive until then? I'm not sure if theres a downfall to being colder with a smaller gap while not spraying..
OR, how would the Double Platinum AC Delcos do with spray? I don't think they're a cold enough plug and I doubt they have a small gap?
Thanks for the help.
Still stock manifolds and catalytic converter.
not sure if it matters, but I figured I'd throw it out there.
View my thread: https://ls1tech.com/forums/lt1-lt4-m...r-headers.html
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Here's 2 I pulled today.. Not counting the 1 that I pulled 2 days ago.
I've got like 6 months on these plugs at most! They're NGK TR-55 "G-power" They're platinum, but not double platinum, is that my problem?
I've swapped these out with more TR55s, but I'm temped to go buy some AC Delco double platinums, but they're $60 at NAPA
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oh yeah DP plugs and nitrous dont mix well.
Last edited by jasonisdn; Sep 30, 2009 at 01:38 PM.
Thanks for the input.. I've ruled out the TR55s as my problem. I've pulled every plug and cleaned them, and replaced 3 with brand new ones. (I figured I would only need a couple so I bought 3)
It still skips, not as bad as before, but none the less, it still is. Its a steady skip, not at random.
Does that sound like the optispark or not? I think on my next day off work I'm going to buy all new plugs and wires and probably new o2's.
My car has high mileage and I think the problem isn't neccissarily getting too much fuel as much as not actually being able to ignite the fuel like it should.


