Question about 1999 Ford Taurus
Are your symptoms the same as having a leak in the intake manifold if so I would check out the function of the differential pressure feedback exhaust (DPFE) sensor in conjunction with the exhaust gas recirculation EGR valve downstream of it. If the EGR is left open it compromises the intake manifold vacuum by keeping open the feed pipe from the exhaust. For this reason the DPFE is supposed to keep it closed during the initial start and warm up of the engine. If it genuinely is a vacuum leak I would be methodical and disconnect each manifold vacuum tube one at a time and block the hole to register the change in engine activity. By reinstating each tube and then moving on to the next one you will eventually hit on the tube that is guilty of the leak.
Posted on May 28, 2010
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Posted on Jan 02, 2017
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