OK G35 family
I live in atlanta i have a 05 G35 Sedan, I went to Z1 motor sports got a tune up March 2010. New spark plugs, and Pop Charger. after about a month or so i have NO PICKUP i have to push hard on the pedal then engine would jump and the car would go.

I went to friend of mine who is a mechanic at Nissan Union City he pull the spark plug out in Aug 2010 and they are black and there is no Hardly any tip left on the plug

What is the cause of this and How can i get the same pickup that you get when get the car off the Dealers Lot????

 

incorrect plugs, high reving, poor tuning, clogged air filter, weak ignition system, weak battery, ect...can cause black and/or worn plugs.

install the correct plugs and correct heat range for your application. make sure air filter is clean and is facing ther correct way. make sure MAF is clean and not damaged. make sure TPS is working properly and clean.

-hope this helps. any CEL's? starting problems?

oh..what mods do you have currently?

 

Aaron
I don't have any mods on the car just went for a Natural Tune up and i added the Pop charger cold air intake. these are the plugs that were install and i'm wondering are they the correct plugs PLFR6A-11. she is not reving High i don't know about poor tuning but i know 1 thing my gas pedal be hard it not easy where u press and the car go. if feels like a 4 cyn and not like how a G suppose to move

 

The oem plugs are PLFR5A-11


The 6a are one step colder plugs for boost and nitrous setups....you don't need that.

Obviously if the tips are gone, you need six new plugs if you are misfiring. I am surprised the cel isnt on. I'd go with oem 5a plugs.

But, I don't think plugs 1 heat range colder would do this. They may be the result and not the cause of your problem. Any other issues with the car?

 

maybe TPS problem very common.

u have yet to tell us if there is any check engine lights and/or any other problems.

if you are running a CAI the MAF sensor maybe dirty or have gotten wet.