u/Status_Effective_864

I was surging a few weeks ago did the iac and tps, and it was fine for a while. After that i discovered a small leak on the lower rad hose after boiling over on the beach, so i drained the coolant and replaced that as well. After that the idle started dropping to almost 0 after about 10-20 seconds of normal range idle after startup. It drives totally normal other than the idle dropping when i come to a stop. Also every time i restart it it returns to normal for a brief moment. What should i check and do any of my previous repairs correlate.