Question about 1983 Honda Prelude

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My sons 83 prelude will idle fine but will fall off sputter and die at exactly 2500 rpms when parked. It also will not cruise down the road easy. If you floor it it will go like crazy. Its either on or off when driving. We Seafoamed the carbs and can find no vac leaks. It is all stock. It has a new fuel filter. I don't think this model has a TPS does it?

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Try this. There is a vacuum array on the passenger's side of the engine compartment leading into the box attached to the fire wall. Cap the first tube at the metal tube array with a rubber vacuum tube cap available a the auto parts store. The tube to cap is the one on top, closest to the bumper. I did this to my prelude after looking for the problem for years. It worked and the car runs almost as good as when it was new. The fix is to replace the vacuum switch insid the box on the fire wall, but I have not been able to locate a replacement yet.

Posted on Feb 14, 2011

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