Some background, I'm new the land rovers. Just picked up my first, a 2011 lr4 HSE lux, with 138k miles, and the 5.0 V8...not sure I need to say that since it's the only engine. Anyway, I have been doing preventative maintenance, latest of which is the coolant crossover pipes. The car has been driving great for the past few weeks, the length of my ownership. The problem: Car cranks, but doesn't start. The cause: I replaced both front and rear coolant crossover pipes. Details: I completed the work yesterday, and the car barely started. It had a very rough start and idled high. I realized I forgot to plug in the connector at the bottom back of the intake manifold. No idea what it is, if someone knows I'd like to know. Today I unbolted the intake manifold partially removed it, just enough to get to the connector (referenced above) and plug it in. I reinstalled the intake manifold and connected all the vacuum, pcv and fuel hose. I go to start the car and it just cranks. I disconnected and reconnected the battery, thinking it would reset any modules. No changes. Had the wife try to start the car while I wiggled the wire harness at the rear of the engine, thinking I loosened up some important wiring. No changes. I removed and reinstalled the intake manifold again, thinking I maybe missed somthing. Nope, everything was connected. Still cranks, but doesn't start. Does anyone have any ideas? Is there somthing I am missing? I'm not new the doing my own wrenching, but this has me stumped. Almost the the point that I'll have it towed to the dealer. This was a simple remove and replace of parts. Fuel pressure is good. I know because each time I removed the fuel rail crossing the intake manifold, it was pressurized. At no time did I remove the throttle body from the intake manifold and both the main harness and the map sensor are plugged in. Thanks in advance.