Don't have that jewel. In fact first time I ever saw one was on Louie's car last weekend. Was indeed bolted to rear of upper air assembly. But my idle still wanders a bit. I MUST be sucking air SOMEWHERE. Re: leaking spark advance diaphragms -- were bad on all 5 of my Lincolns but DeLo is still good. To test just suck on end of hose. Good diaphragm will give resistance and you'll hear rotor move. Truck has electrical advance, now inactive because I've removed onboard computer. Have seen many old cars with leaking spark advance diaphragms, but are usually driven by ported vacuum. Problem isn't there up at idle, and by the time RPM's are up centrifugal advance has accomplished same thing. Some loss of performance, due to unmetered air if nothing else, but not like problems that keep popping up on these lists. Of course DeLo does shoot full manifold vacuum to solenoid at all times... Bill Robertson #5939 >--- In DMCForum@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote: > Hm. Isn't that interesting. > > Between that, and the fact that Bill says the vacuum diaphrams on the > dizzy's are probably shot and that my weights don't fly freely I > probably suffer from some loss of performance from this. > > > --- In DMCForum@xxxxxxxxxxxxxxx, "Walter Coe" <Whalt@xxxx> wrote: > > I recently tested the vacuum advance solenoids from 4 DeLoreans, and > all of > > them leaked air through the base of the electrical connection. Some > leaked > > worse than others but ALL of them leaked. Two of these cars are daily > > drivers, and fixing the leak made a noticeable improvement. I just > sealed > > the leaks using oxygen sensor safe silicone caulk. > > > > I knew I had some vacuum leaks on my daily driver, so I used a hand > vacuum > > pump to see if the line supplying the ignition advance and CPR held > vacuum. > > It didn't. It lost vacuum as fast as I could work the pump. The > culprit > > was the vacuum solenoid. I was going to scarf one off of another > car when I > > found that one leaked too. So I try yet another car and that one also > > leaked. Moments later a friend drove up in his DeLorean, and as he > got out > > of the car I said, "You have a vacuum leak!" And sure enough he > did. On > > hard acceleration his valves rattled. He thought his valves needed > > adjusting. But the leak on his solenoid was bad enough that it wasn't > > advancing enough under hard acceleration. All of these solenoids leaked > > faster than I could work the pump, so that is a pretty significant leak. > > > > Y'all go check your vacuum solenoids and report back how damn clever > I am. > > :-) > > > > Walt Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/M=194081.3897168.5135684.1261774/D=egroupweb/S=170512 6215:HM/A=1706996/R=0/SIG=11p5b9ris/*http://www.ediets.com/start.cfm?code= 30509&media=atkins> click here <http://us.adserver.yahoo.com/l?M=194081.3897168.5135684.1261774/D=egroupm ail/S=:HM/A=1706996/rand=468100453> 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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