Originally Posted by amc49
By successful, just what do you mean? I'm looking for what you perceived as something better there.
No the cat shouldn't do that, if clogged it would run far worse at higher engine speeds and loads. Idle has so little flow through motor not much effect. Of course simply running all the seafoam through there could have wet a plug or something. Anything extra burning can light off a wet cat inside and then it melts, that's no good. Why you never should run car out of fuel nowadays.
Maybe successful wasn't the right term. What I meant to say I always seem to see an improvement. I also didn't run all the seafoam through there.. I used a 1/4 can and put the rest in the tank..So I guess I am surprised at why such a little amount of seafoam would cause these problems. I am just trying to ask what other issues may be causing the misfire...