Isx surging or rough idle

[Chamberpains]

Smorgan you comparison's are rediculous. You can throw any thing you want thru your vehicle. But to give advice that he should do this 1st before he even checks anything or as a "what can it hurt" measure, when infact it can hurt things, that's hillbilly logic. That's no advice at all. With that mentality you need to go in to business selling the stuff. Thats the way they think.
Instead how about actually tearing into things and seeing what caused it. I'll bet a clogged injector is not even close to the top of the list of possibilities if it even makes my list at all. Your $10 blind faith answer could possibly send the problem straight thru an injector. What are you going to do for the guy if thats the case? It is your gaurantee remember...