Land Rover Repair: p1171, p1174, air leak, smoke machine

Question
Code p1171, p1174 show up on my truck, engine runs good with no problem. I have change the maff sensor and the same code come up. when i spray some carburetor cleaner around the intake manifold it runs ruff for a few second. could the intake gasket air leak be my problem for this code? thank you

Answer
I think you've answered your question.  If the engine changes its beat when you spray choke cleaner around the intake, it's getting sucked in somewhere.  At Robison Service, as at other properly equipped shops, we have a smoke machine to pinpoint leaks like that but you may just want to take it apart and reseal carefully.