What is causing high failure rate of Carb rebuilds?
Sent my carb off "to a guy" who had an excellent reputation for rebuilds. I won't go into the particulars, but I got it back, bolted it on, and took it for a shakedown cruise in which it failed badly. I monkeyed with the adjustments a little (Holley 4160) and let the guy know my results. He said, "send it back". So I did.
So here comes my question: A couple of local PCM shops won't even do rebuilds any longer. They say they have so many problems with them that they simply don't offer the service. Why is this? I mean, they could likely make as much doing the rebuild, and keep their guys and gals busy doing them in the off-season, so I'm not sure it's all profit motive.
I've done engine work, plenty of it, but I just didn't want to dive into a carb rebuild, no matter how simple it seems. Anyway, why is it so hard to get one right? Was I handed a line of fiction by dealer? Is ethanol the villain? What gives?
1988 TS-6m
351 PCM (o mods)