Rev cut at 2500-3000 RPM after heater core replaced

[starlord]

I have searched for days and weeks but nobody has had this problem. So I replace my heater core and i have never had so many issues in my life. the car ran wonderfully before the change. i had an srs issue but i have that bug worked out. Then i scanned it and the TPS was at 100% when closed so i echanged with the one off of a stealth it had all the same numbers and markings so its identical i imagine they are the same. but no change at all, tested the lead wires and i got all good voltage from the wires. so jumped to the idea of a bad ecu, so i swapped one i got off of ebay, even made sure it had the exact same numbers and markings. i tested the harness for wires grounded out.

Pins
1-#1 injector
4 Idle speed control motor coil A1
6 EGR
13 ground
14 #2 injector
17 ISC motor coil a2
19 Volume air flow sensor reset signal
24 unknown
26 ground
36 check engine light
72 Intake air temp sensor
81 sensorimpressed voltage
83 coolent temp sensor
87 closed throttle position swithc (idle switch)
90 volume air flow
92 sensor ground.

all of these pins were grounded in the harness.

I tested the for boost leaks also.

also i removed the ac and cruise when i did the evo3.RVR swap and it ran great before the heater core.

SO what could i have done inside the cab to mess this up?

I also pulled the dash 3 or four times to quadruple check that everything was put back as before. all i left out was the ac condenser unit (interior unit) and cruise control switch in the steering wheel. everything else is as it was before. any ideas?
PLEASE PLEASE HELP!!!

 

[weasel1G]

Sounds like you pinched some wires under the hood. Undo what you changed and see if that fixes it. Ex the cruise control switch.

 

[starlord]

I agree, i pulled the dash out several times to insure that i didnt, all i did under the hood was the heater hoses, aside from the TPS change, i also cleaned the MAF... i am beyond confused and lost, my friend from the shop is bringing the scanner back out tomorrow i thing... the door handle just broke on me to

 

[starlord]

crap another thing i forgot, the previous owners stripped the heads on the battery posts so i have been kinda lazy and cheap using pliers on the posts and arched the pos post to the ground strap next to the battery, (right before i went to work on the core) could that had simply fried every sensor on there? is there any in line or wire fuses anywhere? i checked every fuse in the car big and little but nothing is blown that i haven't changed?

 

[starlord]

the code i am getting is the P0120 code for the TPS

 

[starlord]

Anybody??????

 

[weasel1G]

Sounds like you blew a fuse and/or the computer.

 

[starlord]

ok i have narrowed it down i believe. I need some help. as stated above all fuses have been tested. now i tested both tps sensors, both of which are bad "fansy that" now i tested the harness with key on and i have the typical 5 volts at supply, BUT i also get 1.8 volts at sensor return readout port. also the beeper cross feed on my meter also beeps between #1 and #2 pins suggesting a short, thats why i dont just replace and plug in... I NEED somebody to test there car and tell me if they get the anything in the #2 pin with key on, if not then there is a short in the harness crossing the 5 volt into the readout wire. PLEASE HELP ME GUYSSSS!!!