guys i need help, my car keeps failing inspection and i need to know why, i changed sparke plugs and wires, what else do i need to change so i can pass

 

What setup are you running?(engine,mods)

 

d16z6 engine, cheap intake, stock header, pacesetter catback, landspeed cat converter

 

depending on what ecu u using i can say ur running rich
my Z6 its running rich.......
all i can tell u to do know (since i am all tired) its to get a fuel rpess regulator and lean that baby!!
after u set it low.,..... reset ecu and go back and try it
should help a lot......

 

Yeah lean it out and that should do the trick.My car never passes so i always have to pay.

 

im using a p28 ecu

 

if you use a hf ecu...you car wont run right

 

After doing whateveryone else said rev your car for about 20-25 mins< this helps clean out the carbon deposites and is your cat 50 state legal>? if not switch back to the stock one for smog testing. Hth

Blaze

 

If you try lowering the fuel pressure trick, just make sure you keep your foot out of it. Otherwise, you won't have to worry about getting that engine checked again.... hehehe

What color are your plugs and is it uniform?

Might check your MAP sensor hose for fitmit, cracks ect...

Make sure your engine is at full operating temp.

Have the fuel pressure checked, it wil tell you if the fuel pressure regulator needs re-placed.

Has the oil ever been changed, just before testing. Unburned fuel starts collecting in it, along with other nastys. Which gets fed back into the intake. By the PVC valve, and the return from vent on the valve cover.

Just some thoughts...