[Intuit]

Check coolant color. Run a compression leak-down test on it. My guess is the head may be cracked. What do codes read ? 'Fuel at adaptive limits' or something similar ?

Also, after so much time, it's common for the intake and exhaust manifold fasteners to back-off. The former may cause a large enough vacuum leak for such a severe problem to occur.

Unrelated, MAF and ACT/IAF should be cleaned along with normal maintenance of filter/sponge clean/replace but wouldn't cause those symptoms.