I just installed a set of Mac long tubes with pro chamber on a 2005 gt started it up with open headers just to hear it, was good then completed the rest of the install tightened everything down started it again and the engine sounds like a diesel/sewing machine "clack clack clack" and the read out says "low oil pressure" what could it be? I had the dip stick out to install the drivers side but I have done that many times before and never had that problem. I am frustrated, the car's owner is kinda worried and I don't know what to tell him. Please help!
Cheers
Cooper

 

drop a bolt in the pipes?

 

how long did you have it running open headers? maybe a valve blew from not enough back pressure? heard that could happen, i ran open headers on my car for a few days and it was fine....

 

could, but highy unlikely. A valve would be more prone to break if you sealed off the exhaust since you would be putting lots of load on the valves.



Seriously, I think you just dropped something in your pipes.

 

By pipes, do you mean the headers? That may be an option but the noise is coming from the heads or intake and then there is that "oil pressure low" warning. I doubt a lose bolt in the headers would remove pressure from the crankcase.
Cheers for the input and please, keep them coming!!
Cooper

 

And I ran open headers for 1min and 22 sec (recorded it)
Cooper

 

if there was something dropped into the headers, i'm pretty sure it would fall out right away, if something fell into the block, you would know, trust me, you would know.

 

yea, running headers wont do anything. And yes, I think something is stuck in your exhaust somewhere. Perhaps in the cats or on a weld in the exhaust tubing. And maybe running the car without exhaust gasses going through the cat sensors and 02 sensors, it created a code.

Try to reset the computer and see if it still is bad.

 

will the car move when in gear?

 

I reset the computer. The car drives fine, just loud.
Cooper