|
Pre ignition
Hello all. I’m new here. Just got a 2014 M5 CP with 50k miles on it. Love the car but I’m having spark knock issues. Most any time I role into the throttle above 30-50% I get knock as it gets into the boost. I’m in nor cal so I get acn fuel but I wouldn’t think it wouldn’t think it would be this bad. Car is bone stock. I obviously use premium fuel. I got bm3 just to monitor and confirm it was truly knocking. The logs confirm what I’m hearing. I would love to put a stage 1 tune in it but if it gets spark knock in stock form I’m worried. I have changed plugs to ngk 95770 1 step cooler with no change. I switched to Amsoil 0-40 signature oil because it has the api-sn plus rating. Thought it may help after reading about all the low speed pre ignition stuff new di motors see. No change though. It doesn’t consume very much oil so I don’t think that’s contributing. Maybe 1/2 a qt in 3k.
Any advice or insight would be greatly appreciated.
|