Maybe I am just imagining it but the sound the BOV makes seems to be louder and more frequent. The noise I refer to is the chichichi sound when letting off of the throttle. I also noticed that after freeway cruise the idle is erratic for a moment or two, bouncing from 400 to 1000 rpm. This happens mainly after the engine has warmed up and been sitting for a short time then restarted. The idle also seems to be a bit rough and then smooths out.
Additional pertinent info:
No MIL / codes
Checked for vacuum leaks, NPF
Only modifications to intake are Bosch BOV and K&N filter
No smoke from tail pipe or oil consumption
Exhaust is 3" from turbo to tail pipe
MBCV set to 8psi which it doesn't seem to reach unless in 3rd gear pulling hard
Spark plugs and wires were replaced in August (NGK) and have been double checked for arcing/misfire etc NPF. (This was done to pass IM test. NOTE: number 4 plug wire had been completely burned through which may have damaged the converter. I mention this because it only passed the IM test by a small margin.)
I also believe that It doesn't spool up as easily as it used to.
My question is obviously a restricted converter would affect the spooling issue but would it also affect the idle and BOV as mentioned above? Is there a simple check for the BOV? Could this be an AFM issue even though no MIL is displayed?
Any ideas/suggestions would be appreciated.
Additional pertinent info:
No MIL / codes
Checked for vacuum leaks, NPF
Only modifications to intake are Bosch BOV and K&N filter
No smoke from tail pipe or oil consumption
Exhaust is 3" from turbo to tail pipe
MBCV set to 8psi which it doesn't seem to reach unless in 3rd gear pulling hard
Spark plugs and wires were replaced in August (NGK) and have been double checked for arcing/misfire etc NPF. (This was done to pass IM test. NOTE: number 4 plug wire had been completely burned through which may have damaged the converter. I mention this because it only passed the IM test by a small margin.)
I also believe that It doesn't spool up as easily as it used to.
My question is obviously a restricted converter would affect the spooling issue but would it also affect the idle and BOV as mentioned above? Is there a simple check for the BOV? Could this be an AFM issue even though no MIL is displayed?
Any ideas/suggestions would be appreciated.