Plug & gap question

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Grimm
Posts: 4
Joined: Fri Nov 11, 2011 10:35 pm
Car: 92 z32 tt

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Hi, I am new to Z cars and need some advice. I've been having a misfire under acceleration, nothing too bad but it is noticeable. We traced and found all the vacuum leaks so I think the car needs plugs. I did some research and found that the wrong plugs or gap might cause this problem especially since my stock turbos are set at 13 lbs possibly blowing out the spark. My question is should I go with the NGK PFR5B-11B or the PFR6B-11B and what gap .044 or .030? Intuition says the colder plug would be better but I have read that the hotter plug is better for modified engines I am also chipped and running full aftermarket catless exhaust. Any opinions?


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BigTDogg (MA)
Posts: 4194
Joined: Wed Aug 29, 2007 8:26 am
Car: 1990 Nissan 300ZX TT
Location: Boston MA

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PFR6B-11B, 0.035" gap /thread

:)

Grimm
Posts: 4
Joined: Fri Nov 11, 2011 10:35 pm
Car: 92 z32 tt

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Thanks BigTDogg!


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