Hi all,

Having a bit of a headache with this not sure why only one bank would be running rich but please see the attached data from fusion. Any ideas ? For reference 2012 xkr 5.0 sc 88k miles

 

You seem to have a vacuum leak particular to bank 2. There are many ways to locate the leak, if that is indeed the problem.

 

what are trims bank to bank.

 

These are 2 just taken at idle

 

garbage trims on both banks.

does your oil smell like gas

 

Not that I've noticed I fixed a small all leak I found today behind the maf sensor on one side I'll see what the trims are like tomorrow

 

I fixed an vacuum leak I found just after the maf on one side and now these are the trims but still seems to struggle starting

Idle


3k revs

 

Leaks cause +ve trims but you have -ve so it's one of the causes for running rich (such as dirty MAF).

(It's still good to find any leaks as they're another source of pain.)

 

I cleaned the maf sensors replaced the alternator because apparently it was giving inconsistent voltage and have had the O2 sensors cleaned just as a precaution to no avail. I now have no codes for running rich however the long term fuel trims are both still below -11%. I'm inclined now to believe something in the fuel system is wrong but surely I would get a code for it

 

Air filters?