I have Backdraft with a 427IR with 3.5K miles. I normally pull her out of the garage and let her warm up for about five minutes before going for a drive. She usually idles around 1050-1100 rpms. Here lately the RPMs will drop to around 800 and almost stalls before the engine RMPs jump backup to 1050. This will go on for a few minutes before the engine eventually stalls. This exact same thing happen about a year ago (see post) below. The first time this happen I installed an areomotive 340 fuel pump and replaced the wiring connectors and changed fuel filter downstream of pump. I thought this fixed the issue but about a month later I had the same issues. The problem just went away. Well its back. See video below. Any advice will be appreciated. Mike
https://youtu.be/2eeasd1m2bA
Roush 427IR Idle issues