1998 Blazer Idle & Hard Start

So I can''''''''t type my issue, but I attached an image of my text so I hope it works!

Here''''s a bigger image to read and a link to the video of my problem stated in the image.

YouTube Idle Video

My first suspicions would be the Idle Air Control or the Throttle Position Sensor. Have these been checked?

Checked ''em and even tried new ones, no difference.  Voltages were even in check.  That was my first thought as well, but that doesn''t seem to be it.

Any suggestions?

Alright, so a bit of an update.  Took off the plenum cover, all looked decent, no real apparent washing or anything.  But just to be cautious, took of the spider and cleaned it all up and cleaned the poppets/injectors since they were pretty dirty, cleaned up the fuel pressure regulator as well.
Pressurized the system and didn''t notice any leaking or dripping. (Post 1 of... ?)

Once the key is off I drop all pressure within a few seconds. The other problem is my idle goes crazy.

Sensors all seem to check out, no vacuum leaks, but for some reason my IAC valve stays open.  I can take the intake cover off the throttle body and see it just letting all the air in the world in.

It''ll just stay there for 5 or 10 minutes at 3,000 RPM, until say I put my finger and cover half the vacuum inlet in the back of the throttle body.

Once I do that then the pintle of the IAC valve will drop to normal range. Any ideas?

Sorry for the 6 post spam but it''s the only way I could type it all with the forum bugs. So if one would kindly read them one by one, I would very very very much apprecate it. This is the last step before I actually would drive to one of you all''s homes for help if need be haha.

Alright, so it''s a new day, a nice day, but it seems to have brought a new problem hah.  Here''s an update: Recently, I went to Chevrolet and had them use their Tech2 scanner and all just to see whatever they could find wrong with my truck.  What they told me was that my fuel pump was bad, and that''s why I was losing pressure and why my idle was being finicky.  So yesterday, since my fuel pump was still under warranty, I exchanged it, got a new one, and dropper her in.  Seemed alright after that, everything seemed okay, no RPM spikes while driving, no lurching, nothing terrible, until today when it started it''s same old symptoms.  SES light came one, scanned it, came up with a P0452 code.  I read some of swartlkk''s P0452 guide and seems to be an issue with the fuel tank pressure sensor from what I''ve read, but being a new pump, I think I should be looking elsewhere correct?  Let me know what you guys think, thanks again!

A P0452 code could be caused by dirt at the fuel pump seal to the fuel tank...  It could also be a wiring issue...