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JST1FIX · 05-22-2024, 07:59 PM

I have a 19 SS 1LE M6 with K&N CAI, Soler ported 95mm/100mm effective TB, MSD intake, Katech ported GM heads, GPI LT-NFC cam.

I had it dyno and driveability tuned by a trusted local shop and it ran well. But, after driving it home it developed a surge at idle from 800 to 1200 RPM. It would also drastically drop RPM when pushing in the clutch to come to a stop and then recover. Long story short, I have taken it back three times to the tuner, and everytime he is able to adjust the torque settings so that it works well again. But, every time after bringing it home it starts the same surging and sometimes stalls when pushing the clutch in to stop. I even disconnected the battery and did a relearn which worked until I left it sit in the garage for 6 hours and drove it again and it was all back to acting up. I did spray ether around the intake and TB checking for leaks and had no change in idle. It will straighten out and idle eventually, but when driving it goes right back to the problems. Any ideas?

05-22-2024, 07:59 PM	#1
JST1FIX Drives: 19 SS 1LE Join Date: Feb 2024 Location: South Dakota Posts: 9	19 1LE Surging Idle and Stalling I have a 19 SS 1LE M6 with K&N CAI, Soler ported 95mm/100mm effective TB, MSD intake, Katech ported GM heads, GPI LT-NFC cam. I had it dyno and driveability tuned by a trusted local shop and it ran well. But, after driving it home it developed a surge at idle from 800 to 1200 RPM. It would also drastically drop RPM when pushing in the clutch to come to a stop and then recover. Long story short, I have taken it back three times to the tuner, and everytime he is able to adjust the torque settings so that it works well again. But, every time after bringing it home it starts the same surging and sometimes stalls when pushing the clutch in to stop. I even disconnected the battery and did a relearn which worked until I left it sit in the garage for 6 hours and drove it again and it was all back to acting up. I did spray ether around the intake and TB checking for leaks and had no change in idle. It will straighten out and idle eventually, but when driving it goes right back to the problems. Any ideas?