I have installed new summit racing headers with taking off all the air tubes and just leaving the smog pump running open to the air on my 89 formula 350 and there is now what seems to be a rod knock. I am completely at loss what to do. These are the following things I have tried
1. drain the oil to check for no metal shavings
2. Making sure the headers and y-pipe aren't vibrating anything
3. did the best that i can to adjust the roller rockers
4. unplug each spark plug wire at a time to see if the sound went away
I am completely lost right now and scared I have a rod knock or something please help!!

 

Could the noise you are hearing be the output of air from the disconnected but still running AIR pump?

 

i started another thread by accident and tat one actually has more traction here is the link https://www.thirdgen.org/forums/tech...-knocking.html