Originally Posted by F150_NAMED_CLIFFORD
no i haven't but i did the "leak test" and never got a spike in idle. but thats on my to do list though.
You're probably never going to pick it up like that cuz odds are its the intake isolator bolts that are inside the manifold. Do a smoke test with a cigar, compressor, a can and two hoses. Works like a charm man. I struggled for a long time with those codes.
If you do decide to change the manifold gasket, just make sure YOU REPLACE the bolts man cuz those are made out of like some rubber too that mess up with time and heat. I learned that the hard way and had to take everything apart again, and that wasn't fun.