1997 Honda Accord won't shift out first gear, new TPS just installed, idle very low upon start up?

I really really need help on my car. I'm running out of options, and I have tried everything with my knowledge and research on forums/youtube.

My car recently got new transmission fluid with a full flush because I had thought it would fix my idle jumping issue. Sadly, it didn't so I concluded that I had a bad tps/IAC valve. I replaced them both, but now my car does not shift gears and idles very low and slowly climbs.

What could be the issue? I have cleaned out the throttle body as well as the FICV.

Please advise. =/

Also, my car can't be taken out of park without me plugging in the the release hole.

Added (1). Update: I meant my car idles very low and slowly climbs upon start up.

Any code(s)? Was the D4 light is flashing? This is how to check for code(s) without the scanner:

How about the timing? Have you checked the marks on both cam and crank like the diagram in this link:
http://www.fixya.com/cars/t4410126-timing_belt_marks_honda_accord_2_3l
What is the fuel pressure? Have you ever thought about it?
This video will show you how to test the transmission solenoids that may be the cause for the shifting problem:

This link will show you most likely the causes of Honda idle problem: There are some good videos in it:
http://www.ericthecarguy.com/forum/8-Service-and-Repair-Questions-Answered-Here/41476-solving-honda-idle-issues-hunting-idle
About the stuck in park problem, it could be the brake light fuse, the brake light switch:

or the Shift lock solenoid is in the console has failed. The shift interlock solenoid is under the shift console. You have to remove the center console between the seats and then you'll be able to see the shift solenoid. I have had bunches of these that just got gummed up from coffee/cola spillage, it might be worth a try to spray the plunger with WD-40 and work it a little bit.

Go to this link and down load a free FSM for your Accord: It'll show you how to repair your car just about everything:
http://www.carolinahondas.com/installation-how-articles/115167-honda-acura-service-helms-manuals.html
or:
http://www.manualtown.com/honda-fsm/

Hope it help. HTH

Honda transmissions should not be "flushed" --- they should be drained.
But honestly, sounds like your brake switch is broke.
Go to Autozone and pick up a Brake Switch for $27.00 Disconnect the ground wire from the battery. Locate the brake switch (just above the brake pedal), loosen the nut and unscrew the old brake switch and reinstall. Connected the ground wire to the battery.

  • 97 Honda Civic, new clutch and pressure plate but won't come out of gear and clutch pedal won't release? The clutch feels backwards now, won't switch gears unless the car is off and the pedal is all the way up. When you start it in gear it will not come out of said gear unless you turn the car off. The clutch pedal will get stuck down and the car will roll in whatever gear you put it in, when putting the clutch pedal down is supposed to release the clutch… It does not
  • Why peoples sale their very expensive cars in very low rate? Guys m decided to buy a used car! So m just searching on quikr.com and i notice that so expensive cars like honda accord, honda civic. They r old models and their prices are around 15 lakhs! And they selling their cars in 3-4 lakhs rs! I know that cars are very old versions but. Please explain me why! Bcz m going to buy used car! Should i go for it!
  • 98 Honda Accord won't shift out of drive? When I stopped my Honda in a parking lot and tried to shift into park my shifter handle ran forward but the light on the dash cluster stayed on drive, now I can't move my handle out of the park position and I can't start the engine because you obviously can't start an automatic in drive. Any ideas would be helpful because I'm out of them.
  • 98 Honda accord automatic started right up but won't shift out of park? Car ran great this weekend. Serpentine belts were changed, spark plugs checked. Drove to work. Went to leave 4 hours later and started right up but she can't get it to shift out of park. She is two hours away can anyone suggests something to help.