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You gotta be shitting me...

Because the aftermarket unit has fell to entropy.

Why not a vise grip? Why not let the machine shop do it if they are going to resurface?

Yes it is true, and already answered. When cranking there is a signal just to let the PCM know you are cranking the engine and need fuel. Ignoring the 31 AFM code, the symptom is a bad meter. When you have more engine speed, the sensor is able to move where as at idle, it is gummed up from...

This is impossible to be an airflow meter problem. I must be confused about what all is wrong.

So your car runs just fine without a working airflow meter but it is hard to start?

For the record, people saying it doesn't make it so. Toyota changed all of their composite headgaskets, recalls or not. Recall because one had a real problem. The old 3.0 V6 that was in the early 90's 4Runner, the 3V series. They don't last very long. Going back in time, Mark Tozer ran about...

10%, not 85%.

Pressure from the TPS he changed. Based on symptoms the OP listed in the first post, it seems like he has no rest pressure. Which is strange that he hasn't checked it yet.

http://www.cygnusx1.net/Supra/Library/EPC/291210/catalog.aspx?F=6104&P=2

There is a low pressure switch on all cars. By hooking up pressure gauges. Really? I thought that was all you needed to know. Based on what time of the year it is, I am guessing you your pressures will show equal and ambient. It is normal that A/C dies come spring time.

.02mm is the spec for not being round enough. That is way way smaller than 10 or 20 under. The book also says grind and polish (they assume you won't over do it) or throw it away.

Induction hardening of the crankshafts started in 1988 for Toyota. A quick google search shows it. Just for refrence....

The repair manual also says to put 1.7 qts of trans fluid in an A340F after draining a 4Runner, even though nearly 4 comes out. If you want to grind off the hard shell, go right ahead.

That reminds me of the movie The Other Guys. The character played by Donnie Wahlberg and what he said to Will Ferrel in the Prius.

Loose connection. Either in the cable/wiring/ignition swtich or starter itself. I would look at the cables and battery terminal ends first.

Well, I am a proffessional automotive technician, and I worked at Toyota after college. And I went to their classes and largely didn't learn anything but we got free coffee and donuts.

The wire gnome is unhooking things.