In tank electric pump coupled with new mechanical. TFI upgrade and tune up last year. New fuel filters last year. MSD ignition.
Just now developed a new quirk.
For the past couple of weeks, upon start up after warmed, the engine would fire, then stumble and die.
The more recent times, I've stood on the accelerator while cranking to see if it helps. Once, it helped. Last time it didn't Tried again. Had a nice loud backfire. Lots of fuel smell that time. Might have flooded it a bit.
I was leaning toward ignition timing, but the very last time, it was a cold start. One pump of gas like normal. Fired right off, then stumbled. Nearly died, then roared back to life. I'm leaning toward carb or fuel delivery issues. No issues otherwise such as cutting out while driving, lack of power, etc.