Hi all I have a 2003 Nissan 350z with about 116500 miles I installed invidia de-cat stillen y pipe and agency power back box just a week after installing I have p0300 fault code.

I was driving down the road fine and all of a sudden it just sounds like not all the cylinders are working but it come and goes on cold start it's fine for about 30 seconds then it goes again and sounds like a Subaru boxer engine.

Could someone please tell me if I have caused this by installing the decats without a remap or is it something else

Thanks in advance

 

test pipes... they are called test pipes!!!

http://lmgtfy.com/?q=p0300+nissan+350z

 

What is your problem

 

Sounds like a boxer engine? Sounds like an upgrade to me.

 

I wish it was an upgrade but it's very sluggish and I comes and goes and is so annoying

 

You're probably running too lean. Get it tuned sooner rather than later.

 

change spark plugs and coil packs, you like syner said you are also lean from removing the cats