Inspect the EGR valve itself. To prevent the EGR valve from opening when the engine is cold, the vacuum line to the EGR valve may be connected to a parted vacuum switch or a computer-controlled solenoid. SMF spam blocked by CleanTalk. I thought this would be easier than that, where is a ported vacuum? It works like a throttle position sensor, going from high resistance ohms when the EGR valve is closed to low resistance ohms when it is open. This proportional ramping up of EGR gas flow is key to preventing the classic case of tip in stumble that can can be caused by a malfunctioning EGR system. This causes the backpressure diaphragm to open a bleed hole and reduce EGR flow.
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Exhaust Gas Recirculation (EGR)
The logic by which the onboard diagnostics detects trouble follows one of two routes. Did i have the egr appears to egr hookup egr valve is controlled by engine vacuum valve fits focus escape fusion. I've checked for vac leaks several times using propane and found none, the vac gauge needle is steady and shows the proper vac. Ford 6. Right now I'm not sure, but if smaller jets work for me maybe you can do the same.