KOIVUN1
Senior Member
- First Name
- Steve
- Joined
- Jul 8, 2020
- Threads
- 10
- Messages
- 556
- Reaction score
- 510
- Location
- Chicago
- Vehicle(s)
- 2020 Si CBP
- Vehicle Showcase
- 1
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- #1
TLDR: car stutters on cold start, need help with diagnosis
What's up everyone, I seem to be having a new issue that i can't find any related discussion to. Recently my Si has started to intermittently stutter on a cold start. It stutters very briefly, for only a few seconds or so, and then continues to idle normally. Here is a video i took as documentation. If needed, i can note the temperature outside, the humidity, the fuel level, anything that's needed i can take note of.
I've had the Phearable 1.5 tune flashed to my car for roughly 6 months no issues besides clutch slip. I tuned with KTuner V2 and flashed a total of 3 or 4 times since i initially didn't have my cai or fmic+cp installed, so i used the starter maps for a week or so but other than that no other tuning changes have been made.
Only in the past 3-4 weeks has it begun to stutter like this, it's not something that's been around for a while. As the days go on i'm able to listen to different parts of the car after starting it, and the last thing i noticed was the sound coming from the engine bay being way off from what it usually is. Maybe a failing injector or spark plug/coil pack? The strange thing is that the stutter goes just as fast as it comes, and if something was failing wouldn't the stutter remain?
Any help is really appreciated, thanks in advance!
What's up everyone, I seem to be having a new issue that i can't find any related discussion to. Recently my Si has started to intermittently stutter on a cold start. It stutters very briefly, for only a few seconds or so, and then continues to idle normally. Here is a video i took as documentation. If needed, i can note the temperature outside, the humidity, the fuel level, anything that's needed i can take note of.
I've had the Phearable 1.5 tune flashed to my car for roughly 6 months no issues besides clutch slip. I tuned with KTuner V2 and flashed a total of 3 or 4 times since i initially didn't have my cai or fmic+cp installed, so i used the starter maps for a week or so but other than that no other tuning changes have been made.
Only in the past 3-4 weeks has it begun to stutter like this, it's not something that's been around for a while. As the days go on i'm able to listen to different parts of the car after starting it, and the last thing i noticed was the sound coming from the engine bay being way off from what it usually is. Maybe a failing injector or spark plug/coil pack? The strange thing is that the stutter goes just as fast as it comes, and if something was failing wouldn't the stutter remain?
Any help is really appreciated, thanks in advance!
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