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Ran into a couple issues with my car the last week, not sure why. Stock 2013 R spec with 120k miles.
I was driving home from work after filling up on 93 and as I went up an incline in 3rd the engine stuttered and I heard a metallic sound. Seemed to come from the left side (driver) of the car. I eased off and it went away. Happened again the next night getting on the highway going up an incline. This time it was faint at around 3500 rpm but I lost power but my boost was still at 14 ish psi. Sounded like I had a boost leak and I heard the metal sound again
After thinking about it a bit I decided to change the plugs out (10k miles ngk 1 step colder) I put the stock ones back in and the car had the same miss but less noise, missing around 6000RPM but only in 3rd gear, not 2nd or 4th or 5th. Figured it was spark blowout so I changed the gap to .028 instead of .034. Noted that the old and new plugs looked perfect except for the black carbon around the metal thread surface. With the plugs re gapped I drive again and this time I finally get smoother acceleration under partial throttle but I got knock at around 4k RPM again. It doesnt throw any codes but my Torque app log showed .5 knock and 1.5. It immediately took timing down from 12 to 7 degrees but was smooth after that. A small hiccup compared to before.
Anyways studying my logs to find out why i'm suddenly knocking. AFRs are the same as always 10.3 at the richest and near 10.8 at redline. Intake temps 70 to 90 degrees on all my logs. Cylinder temps 1600 max after cruising, in throttle 1500 down to 1350 as boost increases. Timing 9 degrees to 11 or 12 at redline. So all normal so far. Except my boost pressure. Normally it maxes out at 18.7psi. On my log I see a spike to 20.7 and 21.3 at my shift points (tip in). Do I have bad 93 gas? Dont tuned cars see 20psi at more timing than my stock 11 or 12 degrees? Could my wastegate be going bad? Engine rattling does seem to be louder recently. I'm kinda confused as to why after 2 years i'm over boosting if I don't ease into throttle after shifting. I'm fine if i shift and start wot under 3500RPM. It's only at high RPS shifts it spikes and makes bad noises
Sorry for the long post, wanted to include all info.
I was driving home from work after filling up on 93 and as I went up an incline in 3rd the engine stuttered and I heard a metallic sound. Seemed to come from the left side (driver) of the car. I eased off and it went away. Happened again the next night getting on the highway going up an incline. This time it was faint at around 3500 rpm but I lost power but my boost was still at 14 ish psi. Sounded like I had a boost leak and I heard the metal sound again
Anyways studying my logs to find out why i'm suddenly knocking. AFRs are the same as always 10.3 at the richest and near 10.8 at redline. Intake temps 70 to 90 degrees on all my logs. Cylinder temps 1600 max after cruising, in throttle 1500 down to 1350 as boost increases. Timing 9 degrees to 11 or 12 at redline. So all normal so far. Except my boost pressure. Normally it maxes out at 18.7psi. On my log I see a spike to 20.7 and 21.3 at my shift points (tip in). Do I have bad 93 gas? Dont tuned cars see 20psi at more timing than my stock 11 or 12 degrees? Could my wastegate be going bad? Engine rattling does seem to be louder recently. I'm kinda confused as to why after 2 years i'm over boosting if I don't ease into throttle after shifting. I'm fine if i shift and start wot under 3500RPM. It's only at high RPS shifts it spikes and makes bad noises
Sorry for the long post, wanted to include all info.