That was my interpretation as well; I was hoping I was wrong.Donk said:" ... Above this temperature no vacuum signal is applied to the heat valve and exhaust gas flow proceeds through both the right-hand and left-hand manifolds."
That's what I did, but I had a number of little issues going on at the same time I was doing this cleaning, I can't say what kind of effect it had if any. At one time I did run a vacuum line straight to it and there was an increase in sluggishness I thought.Copper Top said:What about plugging the line at the manifold and leaving it perpetually open? What would the real result be in performance? It's already slow to warm up. I'd say I have more than a reasonable probability the intake crossover is plugged with carbon. I've been thinking of switching to a manual choke, so I have a more direct hand in the warming process.