On a S4 would an exhaust leak cause the 5th and 6th port not open properly??? and what other symptons besides bad mpg??

Thanks

 

Where's the leak located at?

 

It could cause the ports not to open.

 

or cause them to open later

 

I had a exaust leak from where the pipe go's into the cat! J B weld Solved that problem..cheap fix if you dont have the tools to weld the hole shut!

 

so is J B weld strong. has it wistood the high heat.

 

JB weld is going to hold up to that much heat?

 

The exhaust leak is located between the block and the header I have a fuged up stud that I never taked care so that side of the header it was with out a bolt and loose , I made a thread on that, long story short I took a look at the gasket and all the upper right corner was all burned up , I'm just asking what would be the symptons in that case: besides low response and powah. Right now I'm still working on my tranny swap and i'm working also on problems like that stud while I have the car on jacks .

thank you