lt1 stand alone in a jeep

i have an lt1 from a 2019 camaro and new stand alone harness and ecu from GM in a jeep with manual transsmission is good and after i took the jeep to a the tuner i have negative idle spark
with the stock file idle spark i good.

Make sure you don’t have any Vac leaks, what’s the map KPA?

here is a log

i uploaded a log

lt1 stock read

upp

Your tuner needs to work this out. If he does not know how to, you should find someone who understands GEN5 better.

As it is a custom install there is probably some changes in airflow that require VVE adjustment. Once MAF and VVE are very accurate, if it still idles with low ignition timing, you can reduce VT in the idle areas. VT also needs to be right on for GEN5 rigs to idle right.

https://forum.hptuners.com/showthrea...egative+timing

https://forum.hptuners.com/showthrea...egative+timing

https://forum.hptuners.com/showthrea...egative+timing

thank you, gen 5 is new to tuners in my area