Nostake
Senior Member
- First Name
- jeremy
- Joined
- Jul 27, 2019
- Threads
- 16
- Messages
- 72
- Reaction score
- 23
- Location
- kalispell MT
- Vehicle(s)
- 2018 Aegean Blue Civic Sport Hatchback
- Thread starter
- #1
So Car was running funny so i took to a local mechanic who was used to and comfortable with turbo platforms. He takes a quick spin and says its AFR 16+ under WOT and boost spiked to 42 PSI and stayed there till he backed off pedal in second gear.......(both issues not seen in any log by me or my tuner) told me to take it back to dealership and said driving it like this WILL cause engine damage. So i was super concerned, i contacted my Tuner for him to look at the data logs.
The tuner said im actually having trouble building boost. He says most cars like mine will hold 21 psi at just 2.5mm mine is in the 17-18 psi range at 2.9-3.0mm. He asked me directly if a boost leak test was done. To confirm my suspicion that there is a leak around the IC i asked him to review the last log i sent him prior to IC install and of course the car was holding boost like it should in that Log. Also my car runs a tiny bit rough at idle and although i get no codes Ktuner says im getting the occasional misfire on all 4 cylinders. STFT was the real smoking gun though. STFT goes up to +17 at idle if i let it sit for a few minutes. Under boost STFT goes negative very quick to -15 and i have seen it as high as -25 or -30. meaning the vacum at idle causes more air to enter than expected causing STFT to rise but once boost is going i get a leak and STFT immediatly goes negative. this rich or lean condition is causing my misfires.
I also hear some turbo flutter at around 3k-4k RPM under heavy throttle( heard only with windows down, not felt) but i think that sound might be normal due to after market CAI and Downpipe at least that is common on other platforms and considered normal.
I complained to the shop and am going to give them one more shot to make this right this coming thursday. I did not ask for a discount as of yet, i did not want to press them on that just yet, gonna wait till after work is done and bring the sheet with me that said my engine was going to blow up if a drove it and ask for refund due to misdiagnosis, basically just boiled down to it was late they wanted to keep if for extra day and i said i need it today, so the mechanic not wanting to stay late made shit up, he even came out to parking lot when i was reflashing back to stock and said the car sounded better and started to tell me how i can do my own leak test...... so any advice on what i should do and what i should expect? they qouted me another 300 for test and to potentially fix the leaks.?
The tuner said im actually having trouble building boost. He says most cars like mine will hold 21 psi at just 2.5mm mine is in the 17-18 psi range at 2.9-3.0mm. He asked me directly if a boost leak test was done. To confirm my suspicion that there is a leak around the IC i asked him to review the last log i sent him prior to IC install and of course the car was holding boost like it should in that Log. Also my car runs a tiny bit rough at idle and although i get no codes Ktuner says im getting the occasional misfire on all 4 cylinders. STFT was the real smoking gun though. STFT goes up to +17 at idle if i let it sit for a few minutes. Under boost STFT goes negative very quick to -15 and i have seen it as high as -25 or -30. meaning the vacum at idle causes more air to enter than expected causing STFT to rise but once boost is going i get a leak and STFT immediatly goes negative. this rich or lean condition is causing my misfires.
I also hear some turbo flutter at around 3k-4k RPM under heavy throttle( heard only with windows down, not felt) but i think that sound might be normal due to after market CAI and Downpipe at least that is common on other platforms and considered normal.
I complained to the shop and am going to give them one more shot to make this right this coming thursday. I did not ask for a discount as of yet, i did not want to press them on that just yet, gonna wait till after work is done and bring the sheet with me that said my engine was going to blow up if a drove it and ask for refund due to misdiagnosis, basically just boiled down to it was late they wanted to keep if for extra day and i said i need it today, so the mechanic not wanting to stay late made shit up, he even came out to parking lot when i was reflashing back to stock and said the car sounded better and started to tell me how i can do my own leak test...... so any advice on what i should do and what i should expect? they qouted me another 300 for test and to potentially fix the leaks.?
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