Ann & Ed, As I had mentioned previously it is unlikely either unit is bad. Both items are fairly simple with few moving parts. I will ask you the same question I asked David. Do you hear the frequency valve buzzing while the engine is at idle? DMC Joe / DeLorean Services / <dmcjoe@xxxx> Web Site: <http://www.deloreanservices.com> ---------- > From: Ann & Ed Thompson <rapparivarat@xxxx> > To: dmcnews@xxxxxxxxxxx > Subject: [DML] Re: Fuel Enrichment Circuit > Date: Wednesday, June 23, 1999 6:43 PM > > Joe, > > My DeLorean has exactly the same starting problems that David's has. > I suspect some sort of device has failed but I too am at a loss for > "guessing" which one. My D has less than 10,000 on it and the > engine has NEVER been worked on or tinkered with until only recently. > The starting problem began years ago. I seriously doubt a wiring > problem or a vacuum line problem. I have all the correct answers to > the questions you posed to David. So, now it's beginning to sound > like either the warm-up regulator or the frequency valve has failed. > Although you state that neither has a high failure rate, which one > do you think would be most likely to fail if that's the case? This > is shotgunning, but perhaps I could change one and David could change > the other one. If one or the other works, then we will know. If > neither works......hmmmmmmm. Then what? > > BTW, how expensive are these two devices? And which one is easiest > to replace? Could either or both be removed, disassembled, cleaned > or repaired, and reinstalled? If so, would that be a reasonable > alternative to replacement? If it works, it works. If not, we are > back to square one, but nothing lost except for some time. What > are the operational symptoms one might expect to encounter caused > by the failure of each of these devices? If I had to describe the > operational symptoms I'm experiencing, they would be identical to > what David has written. I am beginning to get the distinct > impression that the problem we are having is rare. > > Thanks for listening. > > Ed Thompson (#6419) > Midlothian, VA > > DMC Joe wrote: > > > > David, > > Close your wallet, no need spending that kind of money. > > > > Here are a couple of questions. > > Are all vacuum lines properly connected ? > > Has the CO mix ever been adjusted ? > > Is the tamper proof plug still in place ? > > Do you hear the frequency valve buzzing while the engine is idling ? > > > > BTW both the warm up regulator and frequency valve have an extremely low > > failure rate, I seriously doubt that either one needs to be replaced. > > > > ------------------------------------------------------------------------ > FreeShop is the #1 place for free and trial offers and great deals! > Try something new and find out how you could win two round-trip tickets > anywhere in the U.S.! http://clickhere.egroups.com/click/368 > > > > > eGroups.com home: http://www.egroups.com/group/dmcnews > http://www.egroups.com - Simplifying group communications > > > ------------------------------------------------------------------------ eGroups.com home: http://www.egroups.com/group/dmcnews http://www.egroups.com - Simplifying group communications