Quote:
Originally Posted by cmartin248
Check my post about 4 post up,, my codes p0491 and p0492 came in a few days after I replaced my water pump. While replacing the water pump, I apparently moved the small vacuum hose around and it cracked/split next to the recirc valve. Worth looking at due to your recent work...
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also check something called the main sucking jet. when i was working on my water pump / radiator hoses i knocked this bad bay around and it caused some trouble. i just put it all back to together and everything was fine. don't remember the codes, maybe i posted about it, but it definitely ran like crap without the peddle floored.
part #1
RealOEM.com BMW E53 X5 4.4i Vacuum control - engine
the top popped off it (whats pictured to the right, that comes apart). i lined it up properly, snapped it back into place, used a little glue/sealant and used a zip tie to hold it together.