Experts Help - CSL Airbox - Violent Jerkiness and Bucking Under 2k RPM Under Load
Well, no matter how much research I did prior to installing this CSL intake, I have come across a problem that I have not read nor seen anything about. So, I am posting this for reference in case anyone else comes across this issue in the future. Any input from those who have experience is appreciated.
And I will preface this by suggesting, the problem I am about to describe is not the typical CSL hesitation issue. This is a violent jerkiness that shakes the entire car and bucks like a wild bronco. Not good. Here's the video:
So here is the situation:
I installed a Karbonius CSL intake yesterday and along with it I dropped in a new HP DME from Kassel. They set it up with the base map CSL tune alongside a few adjustments for my car. Install went good, simple, no issues.
The setup on the car is as follows:
CSL Airbox running Map Sensor and Turner IAT (US Spec IAT scaling)
Euro Headers
CPI Rasp Pipe Section 1 (with crossover) *Hassan from HTE did mention that this could affect AFR's and cause this to be happening.** I need to get hands on a stock section 1 to try it.
Stock Section 2
SGT Scza Muffler
EGT Delete, No Post-Cat 02's.
Essentially, if I am under 2k RPM, in either 2nd, 3rd, 4th, and roll on throttle, either partially or WOT, the car jerks violently, and stutters until it basically get to 2100RPM and from there she sings. So, for normal everyday driving the car runs like absolute garbage.
Before potentially realizing I had the issue, I wanted Hassan to tune the car so first thing I did was tune it today remotely. After getting the tune setup, I went for a drive and noticed the issue when doing pulls under 2k RPM. I only drove on the Kassel tune for like 2 miles, so I can't say for sure if it did it before, I didnt try too many low rpm throttle roll from below 2k rpm before today, so I don't know if something changed from install to today. But regardless something is up.
So Hassan (thanks again for all the help dude) walked me through and we ruled out a few things so we did the following:
- Flashed back to the Kassel Tune and it still had the same jerkiness.
- Unplugged the map sensor to isolate it as the problem, same issue
- Unplugged the 02s to isolate them as the issue - same problem
- Unplugged the old DME, swapped in my stock DME ---- SAME ISSUE!
So clearly, something is up with the car. I was hoping it was the DME that I had Kassel convert but unfortunately, that is not the case.
I realize that the only way we can really see what is going on is to get an AFR gauge on the car or on the dyno to see what's going on, but even with the way it's running now below 2k rpm I don't really even want to dyno it. I plan to tear the airbox apart and uninstall it, retracing my steps to see what if anything got loose, or went wrong.
But in the meantime, I needed this thread to exist to maybe hear if anyone else had this or a similar issue, or if anyone can chime in to what potentially things I can look into to get my car running properly.
This freaking blows!
TIA and Happy 4th
And I will preface this by suggesting, the problem I am about to describe is not the typical CSL hesitation issue. This is a violent jerkiness that shakes the entire car and bucks like a wild bronco. Not good. Here's the video:
So here is the situation:
I installed a Karbonius CSL intake yesterday and along with it I dropped in a new HP DME from Kassel. They set it up with the base map CSL tune alongside a few adjustments for my car. Install went good, simple, no issues.
The setup on the car is as follows:
CSL Airbox running Map Sensor and Turner IAT (US Spec IAT scaling)
Euro Headers
CPI Rasp Pipe Section 1 (with crossover) *Hassan from HTE did mention that this could affect AFR's and cause this to be happening.** I need to get hands on a stock section 1 to try it.
Stock Section 2
SGT Scza Muffler
EGT Delete, No Post-Cat 02's.
Essentially, if I am under 2k RPM, in either 2nd, 3rd, 4th, and roll on throttle, either partially or WOT, the car jerks violently, and stutters until it basically get to 2100RPM and from there she sings. So, for normal everyday driving the car runs like absolute garbage.
Before potentially realizing I had the issue, I wanted Hassan to tune the car so first thing I did was tune it today remotely. After getting the tune setup, I went for a drive and noticed the issue when doing pulls under 2k RPM. I only drove on the Kassel tune for like 2 miles, so I can't say for sure if it did it before, I didnt try too many low rpm throttle roll from below 2k rpm before today, so I don't know if something changed from install to today. But regardless something is up.
So Hassan (thanks again for all the help dude) walked me through and we ruled out a few things so we did the following:
- Flashed back to the Kassel Tune and it still had the same jerkiness.
- Unplugged the map sensor to isolate it as the problem, same issue
- Unplugged the 02s to isolate them as the issue - same problem
- Unplugged the old DME, swapped in my stock DME ---- SAME ISSUE!
So clearly, something is up with the car. I was hoping it was the DME that I had Kassel convert but unfortunately, that is not the case.
I realize that the only way we can really see what is going on is to get an AFR gauge on the car or on the dyno to see what's going on, but even with the way it's running now below 2k rpm I don't really even want to dyno it. I plan to tear the airbox apart and uninstall it, retracing my steps to see what if anything got loose, or went wrong.
But in the meantime, I needed this thread to exist to maybe hear if anyone else had this or a similar issue, or if anyone can chime in to what potentially things I can look into to get my car running properly.
This freaking blows!
TIA and Happy 4th
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