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You can have the car motor vac'd. The system (made by Snap-On) replaces your fuel tank and fuel pump. You run the engine off of it and it sends detergent (ie Techron-esque stuff) through your fuel system. It also sends pressure pulses through your system. Cleans off the valves too, and should increase your idle vacuum by an inch or so.
Have you replaced your plugs lately?
Doug
1975 911S
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