Well, it looks like I've some work to do. Started the car and the AFR's were pretty rich but I figured the PCM needed to adjust to the hose being plugged in. Off I went to the supermarket and all was normal. I even accelerated sorta fast. On the way back, punched it, multiple miss fires on 3,4 and 6 along with P0161. IAT's dropped to 69º. I like things black and white and hate searching for problems. Plan of action: Fuel pump because I already have it. The IAT sensor seems to be involved so tomorrow I'm calling Rob for a new one and a fuel filter, might as well.
Oil is clean. No coolant or strange smells. All spark plugs look normal, no visible damage. Cars not smoking. I suppose a compression test would be a good idea to rule out serious internal problems. I'll pull the fuse for the meth just in case it's malfunctioning.

Any more suggestions?

Les

I have a spare throttle body too. I'll give it a try as well.