Rich Hard Start - The Ongoing Struggle

And then today we are back to having major issues getting going. I'm lost

 

When it starts you said it smokes for a while? clearing out excess fuel right? seems like it floods itself... usually caused by injectors, no spark, no compression, bad timing etc. A fuel pump module wouldn't cause excess fueling to me. even if the pump was running extra voltage somehow, its the fuel pressure regulator that sets the pressure in the rail. so the pump in itself cant really cause over fueling, but it could cause under fueling, which doesn't seem to be the issue. i forget what you've all done but perhaps test for fuel pressure and get your oem injectors flow tested and cleaned. at least that way you can rule out the fuel system. and its good preventative maintenance too.

 

Only for like 10-20 seconds till it smooths out

Injectors, pump, and pressure are good. Remaining suspects are spark, fpr, tb or position sensor, compression, timing. The trouble with any of those (or anything else for that matter) is that there is no evidence of an issue other than at start up. Once it's running its perfect, and the only codes I get are occasional misfires and startability malfunction which are not helpful. And I don't think I'll bother checking compression again cause if it is that there's nothing to be done but to get rid of it.
Going to pull a vacuum on the fpr today, but not sure what good it will do since this fpr isn't actually connected to vacuum, just the air box thingy.

 

Not the fpr, put 20psi on it and it didn't drop at all in 10 minutes

 

Pulled the plugs today, cleaned and gapped.

 

Wild. I wonder if it's not sparking during cranking sometimes. Wonder if you could test for spark or power at the coils during the initial start. I know some older toyotas have the injector and coil power run through the ignition. Not sure if our tundra are that way. I had an issue this winter where my ecu would only come on during cranking. It would fire instantly but then shut off as soon as I let go of the key. Wiggled the ignition wires and suddenly ecu turned on. Been working fine since then.