Trying to sort out a very annoying issue on my 2015 that has been frustrating me for a few weeks.
Bought the car all stock, 57k miles. It had a new slave, trans fluid, and clutch put in at 53k miles at the dealer so felt like a decent buy. Did the usual new vehicle to me program of oil, filter, sparkplugs (iridium) etc. Drove just fine.
Out of curiosity I wanted to uncork it and get a Cobb. Ran fine on Stage 1. Got the itch for stage 2 and did intercooler (Mountune), and Koyo rad. Ran fine again. Timing belt has already been done. Car has 67k miles now.
Popped on a stage 2 tune (at this time, who it is doesn't matter, the issue is with my car), and was quite pleased with it. I noticed a weird kazoo noise in the cabin and figured the symposer was leaking, so I deleted that with a Whoosh plug. That's when the issues started or maybe they'd been there the whole time, but the symposer cabin noise was covering them up. I heard noticeable pinging from the car under load, still pulled fine, but I thought eh, maybe it's a boost leak. Cut the hose shorter on both ends, put on a new clamp on both sides. Still there. Replaced plugs with pre-gapped to .028 ruthenium from Tunewerks. Still pinging. I did send the tune to the tuner, who said it didn't look good and suggested bad gas. I've run 5 tanks through it, all from busy stations, a mix of Shell, 76, and Chevron - same result across all brands.
To start, yes, I have read the article from Stratified about negative timing corrections. I've been seeing a very regular -3, even -4 on all 4 cylinders and the tune just feels sluggish, it's pulling timing the entire pull and you can audibly hear pinging from the engine. Even taking the car back to Stage 1 Cobb, I am hearing pinging. It seems crazy to me to have to go back to stock after all this.
Where should I look at next to try to try to cure this issue? I am at wits end.
Bought the car all stock, 57k miles. It had a new slave, trans fluid, and clutch put in at 53k miles at the dealer so felt like a decent buy. Did the usual new vehicle to me program of oil, filter, sparkplugs (iridium) etc. Drove just fine.
Out of curiosity I wanted to uncork it and get a Cobb. Ran fine on Stage 1. Got the itch for stage 2 and did intercooler (Mountune), and Koyo rad. Ran fine again. Timing belt has already been done. Car has 67k miles now.
Popped on a stage 2 tune (at this time, who it is doesn't matter, the issue is with my car), and was quite pleased with it. I noticed a weird kazoo noise in the cabin and figured the symposer was leaking, so I deleted that with a Whoosh plug. That's when the issues started or maybe they'd been there the whole time, but the symposer cabin noise was covering them up. I heard noticeable pinging from the car under load, still pulled fine, but I thought eh, maybe it's a boost leak. Cut the hose shorter on both ends, put on a new clamp on both sides. Still there. Replaced plugs with pre-gapped to .028 ruthenium from Tunewerks. Still pinging. I did send the tune to the tuner, who said it didn't look good and suggested bad gas. I've run 5 tanks through it, all from busy stations, a mix of Shell, 76, and Chevron - same result across all brands.
To start, yes, I have read the article from Stratified about negative timing corrections. I've been seeing a very regular -3, even -4 on all 4 cylinders and the tune just feels sluggish, it's pulling timing the entire pull and you can audibly hear pinging from the engine. Even taking the car back to Stage 1 Cobb, I am hearing pinging. It seems crazy to me to have to go back to stock after all this.
Where should I look at next to try to try to cure this issue? I am at wits end.
