Ok, I don't wanna keep you from quality Ford time.... You're either not reading my posts or you don't follow them. There *is* a path from the valve cover into the induction system through the cold start pipe engine via the oil filler breather. Do you know the meaning of vapor pressure? There is a huge difference between pulling in a little air and shooting something with a vapor pressure of carb cleaner into the induction system, not to mention it's hydrocarbon based. It's a very volatle substance and flashes very quickly into a vapor. In other words, if the vacuum leak altered the engine's operation enough you wouldn't need the carb cleaner to find it. Of course you're gonna see a change, especially when you aim it up towards the breather in the valve cover. A direct measurement of the pressure in the valve cover is the only way to be accurate, you can't cheat by using an substance that will drastically effect the engine's mixture. After all, *thats* why you use it to find....vacuum leaks! (I hate that term, there is no "vacuum" leaking into the induction system.) So your carb cleaner is getting into the induction system via the cold start pipe and makes a much greater difference than a little air would. This will happen anywhere you spray it around the valve/timing covers where there is a path to the inside. In effect it *is* a good way to find leaks, but you're finding leaks that make no little or difference in manifold pressure. Try disconnecting and plugging the vacuum line to the cold start pipe and then see if the solvent has any effect, thats a direct path into the manifold. Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=259538.3793308.5048975.1261774/D=egroupweb/S=170512 6215:HM/A=1712983/R=0/SIG=11u38u3s2/*http://hits.411web.com/cgi-bin/hit?pa ge=1374-105951838331032> click here <http://us.adserver.yahoo.com/l?M=259538.3793308.5048975.1261774/D=egroupm ail/S=:HM/A=1712983/rand=603646771> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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