hi guys my CEL came on again went to autozone the guy tested and said something about misfiring and too lean..codes are bank1 and bank2
and he told me it could be spark plugs...
my car has 35-40k miles on...should i change out my 6 spark plugs? if i do ,what brand and type should i get for N/A mods?
i searched and found NGK r pretty good,but not sure which part# to get please advice thanks DRIVERS!

 

just get direct replacements NGK's. sorry dont know what those
codes are though. Is she running ruff? Idle not smooth?

Maybe first check the wires //make sure you have no lose 1"s

 

i believe you dont need to change your sparkies untill 100k but you should get the same sparkplugs that are for the g. its the ngk iridium.

 

she is running fine and smooth nothing special..start-up are good too

 

bad plugs can cause misfires, but I don't know about it causing a lean condition.

However, a lot of things can cause a misfire... Bad plugs, bad wires, bad coils, clogged fuel-injector, etc....

If you have a bad fuel injector, that could easily cause a misfire and/or a lean condition... But there are diagnostic steps to check that... I went through that on my other car....

First place to start, is look at which cylinder is giving you misfires... All cylinders, only one cylinder, pairs of cylinders, etc.... That will help you look in the right direction...

 

1. Never trust the autozone guys, especially when they start talking about spark plugs and air filters. The blame all car problems on these in order to sell product.
2. You shouldn't need to replace your plugs until around 75k miles.
3. What other mods do you have on your car? You may just need a utec and a tune.

 

i changed mine at 30k they were black and 1 plug was burnt...

 

if your car is starting fine and running smoothly its definately not the spark plugs. your car wont run right if your spark plugs start to go but that shouldnt be till around 100k miles. the spark plugs will always be a little black, thats just a product of the combustion. Unless the metal tip is really back they are fine. Maybe you just need a tune

 

Thats not good....

 

well the 4 other cars i changed plugs on looked the same as well...the plugs would go to 100k but wont perform like it did at 10k...

 

no the car comes stock with platinums... you can put in iridiums.

 

lexus uses denso iridiums as stock

 

ur right i think i need a tune or so... cause i have most NA mod only headers i dont have