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Test 1: 4.2L

WARNING: This page does not describe the selected car, but rather 70 other vehicles, including the 2010 Jaguar XKR, 2010 Jaguar XK, 2010 Jaguar XJ, 2010 Jaguar XFR, and 2010 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

With engine not running, disconnect vacuum hose from EGR valve. Connect a hand-held vacuum pump to EGR valve. Apply vacuum to EGR valve and ensure that diaphragm will hold vacuum until released. EGR valve should close when vacuum is released. Start engine. Disconnect vacuum hose to EGR valve and plug. Apply vacuum to EGR valve. Engine should run rough or stall. If system operates as indicated, system is functioning properly.

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