<< How common is it for there to be a leak in the gasket that goes between the lower housing of the fuel mixture housing and the throttle valve assembly? ( Pete and Group, I have taken apart several air flow mixture units and the gaskets were in good shape I would be more worried about the Idle speed motor tube that goes into the lower part of the air flow meter.If it's not almost perfect. Total loss of vacuum.) Car won't run right.) The reason I ask is that my car was running ok, with the exception of some issues I posted on last fall where the car would be going fine down the highway, but when I released the gas for a moment and then accellerated again, the car would just start dropping speed. It seemed as if backing off the accelerator would help a bit, but the car wouldn't go above 55, and I'd have to do some quick lane changes as everyone here in Detroit wanted to speed by... ( Again, If you have checked the brass hose going into the air flow mixture lower housing, then I would say your having another vacuum leak that won't advance the dwell or the warm up regulator isn't working right. There is tiny filter in the warm up regulator gas input side that may be partially stopped up. You can have pressure but no power due to gas starvation, the same symption can occure it the fuel filter is stopped up.) The fuel system is like you blood system, it has to flow freely to work right. A stopped up filter in the regulator could be a lot of Yall's power problems.) I decided a tune up couldn't hurt the situation, but then the nightmare really began - after new spark plugs/wires/cap/rotor, (taking off the two bolts and pulling up on the mixture unit to get clearance to get the distributor cap off, and the car ran like complete garbage. Couldn't go above 25. I looked and looked for any sign of a vaccum leak, disconnected wires, etc. Nothing that I could spot. I started replacing the replaced parts, with the old parts that at least would let the car run good enough to drive around town, and still the same symptoms. The car sat through the winter in the garage, and now when I went to turn it on, it won't start - unless you give it gas right away and keep it above 1000rpm. No longer does it sit at the nice fast idle, then back off after a couple minutes. You just have to kick in the gas or else it won't even be close to staying alive, and the word idle is not a part of this car's functionality any longer! If you floor the pedal, it won't go above 1000 or 2000 or wherever you have it - it just sounds starts sputtering. If you back off the accelerator a bit, it zooms up in RPM very fast. If you accellerate more gradually, it will rise, but usually sounds a bit rough in doing so...Took the plugs out - all are equally alike - dull black. ( Dull black would indicate to me a rich burning fuel system. It sure looks like the warm up regulator is cooked.) I do now have a good used warm up regulator that I can loan out, with a deposit.) John hervey http://www.specialtauto.com/ Pete Bartusek #6707 >>