I bypassed mine with no ill effects on my 73. Could not find an easy way to test it short of removing it and putting it in boiling water. Kerryp --- Mark Blitman <markblitman@xxxxxxxxxxxxx> wrote: > hi gang: > > can someone advise me on the merits,if any, of > replacing this valve? this valve applies manifold > vacuum to the vacuum advance unit of the distributor > in order to increase engine idle speed and engine > cooling when coolant temp.reaches above 225 > degrees.Below 225 degrees it doesn't work. > > It has 3 vacuum ports on the valve; one to manifold > vacuum source, one to top of OSAC valve and one to > vacuum advance on distributor. On mine, the top port > is missing so it probably doesn't work right and to > further complicate things it is routed thru the OSAC > valve so if one is not working then probably both > are not working right. > > I routed vacuum hoses on OSAC correctly and bypassed > TIC valve and car is running beautifully; therefore > my question is do i really need this TIC valve..i > mean if coolant temp starts to rise while stuck in > traffic can i get the same results from putting it > in neutral and stepping on the gas to increase > engine speed? > > i guess i am afraid to take off the old valve(hard > to get to) but i will take it to a pro if need > be...any help would be appreciated..thanks! > > mark blitman > '74 imp > __________________________________________________ Do You Yahoo!? LAUNCH - Your Yahoo! Music Experience http://launch.yahoo.com