TwinTurbo.NET: Nissan 300ZX forum - pfr5b-11b are the correct plugs.
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Subject pfr5b-11b are the correct plugs.
     
Posted by Draker (Eugene, OR) on May 24, 2011 at 4:39 PM
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In Reply To Not quite driving right posted by halesy22 on May 24, 2011 at 03:07 PM
     
Message 22401-40P65 turbo spark plugs STOCK (PRF5B-11B)
22401-40P66 turbo spark plugs COLDER (PFR6B-11B)

Ohm your injectors. They are prone to failure.
If you are not sure how to do this, search the faq. All the information you need is in there. Another potential failure is the coil packs. Switch 2 & 4 if you think #2 is failing. If the problem then switches to #4 then it's the coil pack. You can also ohm the coil packs. If yo take the car to a dealer you will walk out of there with more stuff wrong with the car then when you brought it in there. These cars haven't been seen in the dealer for over 10 years. And out of production for over 15 years.

They are likely going to give you a quote for a plenum pull and a injector or a full set of injectors. Somewhere around the $1500 - $2k mark for parts and labor. The good news is you can get an injector for about $100 and install it yourself if needed.

Turbos starting to go, meaning going bad? or starting to work? If they are going bad, you won't boost. Starting to work, you will see the boost gauge go into the positive.

     
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