Tried carb cleaner, starting fluid, propane, curses and hot air. nothing makes a change. I even put a propane torch (not lit) directly in the primary with the car running and it did not change the idle??? The PVC valve rattles and has a strong vacuum on it. I'm convinced it is a fuel/air thing. Either a vacuum leak or the carb. Wish I had a spare carb. Btw, its a rebuilt (store bought rebuilt) Thermoquad. Kerryp --- bandmgrinding@xxxxxxxx wrote: > Hi Kerry, > Have you tried the old spray carb cleaner around > the manifold to see > if it increases RPM ? Have you checked to see if you > have the right pcv > valve? Try blocking off the pcv and brake booster > lines and see if it > runs any better. What carb is on it? Sounds more > like you are running > rich if you give it more air and it runs better. > Have you checked for a > plugged exhaust or collapsed muffler ( not likely > but I've seen it > happen) > If you have a thermoquad, I've seen these have a > bowl problem that causes > this, we worked on a state troopers car years ago > that had this type of > problem. Funny thing about that one was that it ran > better at night than > during the day. Drove us crazy till we changed the > carb, even though we > had rebuilt the old one a couple of times. > Good Luck > Allan R > > On Fri, 15 Mar 2002 15:16:59 -0800 (PST) > KerryPinkerton > <pinkertonk@xxxxxxxxx> writes: > > Well, I'm approaching stumped. My 73 runs like > crap > > and I've messed with it til I'm about out of > ideas. > > > > Here are the symptoms: > > > > Timing set at 10 degrees BTDC with the Vac adv > > disconnected and plugged. > > > > Vac gauge shows about 17, it used to be about 20. > > > > I have adjusted on the carb and timing and made > little > > change in the vac. > > > > i have disconnected and plugged ALL vac lines with > NO > > change on the vac guage. > > > > The car runs right now as well as it's run > recently > > WITH THE BREATHER OFF. With the breather on it is > > very FLAT at high RPM and has a slight bog if you > > punch it at idle. Turning the breather lid upside > > down and letting more air in helps but not as much > as > > removing the breather completely. > > > > Vacumm leak you say. I've tried the starter > spray, > > propane trick and get no RPM or engine noise > change. > > > > Compression is 130 per cyl. > > > > Now for the interesting stuff, under some > conditions > > of timing, I can screw the idle jets all the way > in > > and the car still runs which makes me think vacuum > > leak. Also the car will not idle down below about > 600 > > RPM even with the screw completly backed out. > > > > Plugs are about a year old but probably don't have > a > > 1000 miles on the, same with wires, rotor button, > and > > cap. Cap does not show signs of damage or wear. > > > > At this point, the only think I can think of is > that > > there is a vacuum leak around the intake manifold, > > probably on the bottom where I can't get to it. > > > > Before I pull it off, I'd like to hear from the > wisdom > > of the group. > > > > Oh, one piece of good news is that my 'ticking' > sound > > was a bad exhaust manifold which has now been > > replaced. > > > > Kerryp > > > > __________________________________________________ > > Do You Yahoo!? > > Yahoo! Sports - live college hoops coverage > > http://sports.yahoo.com/ > > > >