Your mention of vacuum leaks reminds me of an anomaly in Farrar's recent distributor fire that thus far has gone totally unanalyzed: The vacuum line to Farrar's modulator valve is TOTALLY missing: http://us.a2.yahoofs.com/groups/g_hr_1154320/f92d/__hr_/2a42.jpg?grwO_YIBNUrbGoBw It isn't just damaged (none of his rubber is damaged in fact) -- the entire hose is MIA. The far end of that hose is adjacent to the transmission, BTW: Very far from the distributor fire. Was the hose somehow lost during fire extinguishing, or during the subsequent tow home, or did its absence PRECEDE the meltdown/fire? Vacuum leaks will do much more than just throw your idle off. They cause cylinder temps to absolutely skyrocket. Look at what happened to the spark plugs on the driver's side of my engine when the hard plastic vacuum line to my HVAC cracked (I was still K-Jet at that time -- HVAC was plumbed through the passenger intake rail, which fed driver's side of the engine): http://us.a2.yahoofs.com/groups/g_hr_1154320/af49/__hr_/3233.jpg?grwO_YIBjKp.pNSq Notice the electrodes are melted completely away -- ceramic side too. If Farrar lost his modulator vacuum line BEFORE the meltdown, what would have been the effect to his engine? Note also that Farrar only has one vacuum trunk line. PCV, HVAC, brake booster, and modulator valve all feed off the same 3/8" barb. If he lost that modulator line, none of the other systems would work properly, PCV included. Food for thought. This could be just another rabbit trail theory, or it might be worth considering further. Bill Robertson #5939 >--- In dmcnews@xxxxxxxxxxxxxxx, "bitsyncmater" <david.mckeen@...> wrote: > > I think a PCV valve is not a check valve but a controlled volume > (like an orifice). If you use to much vacuum flow you will never get > your idle speed down to 750 RPM. (Just like other vacuum leaks) > ------------------------------------ To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnewsYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/