I put a s/c on my car and I think i ran it to lean and now when i rev it there is a slight knock. What did I do? could it just be detination?? Or did i burn a valve or something. It still runs fine it just has a slight knock. I was testing it out and my damn intake pipe fell while the car was at 6000 rpm and it was like hitting a brick wall bc the MAF stopped reading. I shut it down imediately.

 

Could be broken piston ring lands. Alot of car still run fine but have broken ring lands. I would do a compression test or a leak down test...

 

What's your AFR?

 

i dunno i dont have a wideband and its not tuned.

 

SC and not tuned? OMG !!!!

 

thanks for pointing out how big of an idiot i am lol , i got to impatiant and wanted to drive b4 a tune.