I need some help diagnosing knock on my friend's 2010 GSR.

After installing an UR catback and HFC on his GSR, I flashed his car with Gunzo Venti 93 oct map using ECUflash. After doing some logs with Evoscan, we noticed there was the car was registering a large amount of knock, up to 30 counts at around 1000-2000 RPMS during cruising. When we do WOT pulls there is no knock and AFR's are still on the rich side.

Is this random knock phantom knock or real knock? Could this knock be caused by rattling of the exhaust we just installed?

FYI, only other mods on the GSR is a HKS filter and UICP.

 

Anyone ?

 

you probably have a problem with the log, maybe the request is not good , does the other data are all ok???

 

The knock request looks good. You can see in the logs that timing is pulled when the car registers the knock.

 

the knock you got is at 1500rpm ( not very dangerous at low rpm )

but it strange the tps is very low ????

do really pull, in gear 3, between 2000 and 7000 rpm to check everything is ok

maybe not good fuel or the road is bump!!!

 

and you never go on boost on that log?????

maybe the psi not working , why i think the log maybe not so good

 

at that rpm it most likely is phantom knock. Loosen the DP and try it again making sure it isnt touching anything.

 

We did at 3rd gear 2000 to 7000 he just never added that log he added the log with the most knock just cruising.. And on evoxfourms they were saying that it could jut need a oil change something to do with MIVEC and oil pressure so going to change oil since it's time 2 and recheck