U said ur heat is cold. Does ur cruise control Work. If ur cruise control does not work and it did before then u have the vacuum lines crossed on the back of the intake pipe close to the fire wall. That vacuum controls the cruise control and the door that opens to feeds the heater core. that's what happen to me when I rebuild my motor

Code 41 is a break/short in the THA signal line or a problem with the ECU. Code 51 is the TPS IDL switch (completely different wires), the A/C, or a fault in the ECU. Test the wiring, test the IDL switch for continuity when closed... if possible try another TPS.

The TPS is used to not only trim fueling but also to tell the ECU when the engine is at idle so it can properly modulate the ISCV.

ok i got some youtube.com links for ya

http://www.youtube.com/watch?v=bKE20D4W_zM

http://www.youtube.com/watch?v=ZS0ZiZhUsIg

http://www.youtube.com/watch?v=mIoWKVT8oh8

any help would be appreciated.

What's the swishing noise? Timing belt not on?

Your TPS is unlikely to be the problem... the short causing the TPS related code 41 may have a lot to do with the problem though if it's in the harness and affecting the voltage at Vc... but you'll get that from your TPS just not being connected.

I would test the AFM thoroughly and verify that both mechanical and ignition timing are dead on. 10?BTDC for the ignition timing and don't forget it must be in diagnostic mode.

so i should put my timing light on the number 6 spark plug distributer cord and see if it hits on 10 not 0.

It need to be on the #1 plug wire; The GE is not like the GTE where 1 and 6 fire at the same time and either may be used. Yes, it needs to be at 10? not 0?.

Have you verified the mechanical timing is zeroed out?

you mean the timing belt and the crank shaft sprockets?

Yes, the harmonic balancer should read 0? and the marks on the cam gears should align with the marks on the rear timing cover (straight up and down). Keep in mind that every other rotation, they will not line up.

Also, this would be a good time to verify the timing belt is properly tensioned; that sound in your video that Cre referred to sounds horrible, and it does seem like it's at the front of the engine.