new alternator...now more flash codes.. :(

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when i start the car cold it starts idle at around 900-1000 rpm...within about 3 seconds of this idle the check engine light goes on, at that exact moment idle drops to around 500 rpm and starts to fluctuates from 500-600rpms.. if i give it throttle to around 1000 the check engine light goes off, as soon as i let off throttle from that time the rpms drop to a stumbling 450-300 rpms with check engine light back on then returns to the 500-600 rpm range.

i started looking at the TPS connection and removed the wire harness for inspection.. i forgot to reconnect and started the engine..to my amazment there was NO difference in the cars idle or rpm from previous description above.. whatcha think???

i think i might be getting somewhere.. help me plz