K24a JDM Starts But No Idle
Posted: Sat Jan 31, 2026 9:34 pm
Hello, I've been working on a K Swap in a Del Sol, I have everything installed, and am now trying to get it running properly so I can finish burping the coolant and then move on to figuring out how to street tune it myself.
At one point, the car ran on one of the Hondata K24A base tunes, and I was burping the coolant. Everything was running fine, when I was burping the coolant, until the afr randomly spiked to about 20ish, and then it abruptly shut off. When I went to start it again, it cranks then starts very briefly, rpm reaches about 1k, then drops down to 0. I thought it was the p0335 code I had, but I just recently finished fixing the crank sensor and now the code is gone, but I still have the same "crank then immediately dies" issue. I'm not sure if it just needs a different tune, or if the injectors aren't firing, and is just starting off the primed fuel.
I have a datalog of it, hopefully the link works:
https://1drv.ms/x/c/6358ee24f613201f/IQ ... U?e=XGibcg
Setup:
K24A JDM (RB1)
KPro V4 + Wideband 02 sensor
Rywire Tucked K Swap Harness
Hybrid Racing Fuel Pump + Press. Reg. Set at 55PSI
Hybrid Racing Fuel Rail w/ Stock Injectors
4-2-1 Exhaust Manifold with 3" Exhaust
RBC Intake w/ 60mm TB + Hybrid Racing Cold Air Intake.
At one point, the car ran on one of the Hondata K24A base tunes, and I was burping the coolant. Everything was running fine, when I was burping the coolant, until the afr randomly spiked to about 20ish, and then it abruptly shut off. When I went to start it again, it cranks then starts very briefly, rpm reaches about 1k, then drops down to 0. I thought it was the p0335 code I had, but I just recently finished fixing the crank sensor and now the code is gone, but I still have the same "crank then immediately dies" issue. I'm not sure if it just needs a different tune, or if the injectors aren't firing, and is just starting off the primed fuel.
I have a datalog of it, hopefully the link works:
https://1drv.ms/x/c/6358ee24f613201f/IQ ... U?e=XGibcg
Setup:
K24A JDM (RB1)
KPro V4 + Wideband 02 sensor
Rywire Tucked K Swap Harness
Hybrid Racing Fuel Pump + Press. Reg. Set at 55PSI
Hybrid Racing Fuel Rail w/ Stock Injectors
4-2-1 Exhaust Manifold with 3" Exhaust
RBC Intake w/ 60mm TB + Hybrid Racing Cold Air Intake.