Good morning all! A little back story on my situation. I bought a LS1 with a tuned ECU from an 01 Trans Am many years ago. The guy I bought it from was using it as his daily but was wanting to go bigger so he sold it to me. I have the motor in my 05 Infiniti G35 with a T56 from a 06 GTO. The motor runs great and pulls hard. I am not running a wideband because the guy I bought it from was using it as his DD and had it dyno tuned. I have not made any changes to the fuel and/or spark tables.
I have had a throttle dip issue since the beginning. It will happen when the car is cold or hot. It happens in neutral and also while cruising if I shift into N to coast and let off the gas. The RPMs will sometimes dip once and then recover and other times they seem to dip 4 or 5 times and then recover. I have learned to blip the throttle a bit when they start to fall to prevent stalling but this can get tricky in heavy traffic and I am getting tired of it. The car will rarely die if I don't do anything to help the idle when it is dipping. I have attached 2 logs - 1 of me cruising and then shifting into N and the other is of me idling and then blipping the throttle (both logs were done on a warm engine).
The engine mods are as follows - 01 LS1, PRC Heads, MS4 cam, Speed Density, FAST 102, Long Tubes
1-28-2022.hpt
Cruising Neutral Shift Throttle Drop.hpl
Warm Idle Throttle Blips.hpl
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