I changed injectors twice over the last 20 years, trying to help a heat-soak starting/chugging problem. No effect.
But, the car always ran and idled fine after the first few seconds of chugging, so I was chasing the wrong dog. (still haven't caught the right one after 20 years).

To paraphrase the neighbor talking with Dustin Hoffman in The Graduate; "I have one word for you - EHA".

Well, after 50 years, I finally heard an non-glowing comment about Techron.

DG