Volvo Repair: racing idle, throttle position sensor, vacuum leaks

Question
I know this is not your make but the top brass suggested I try another expert because the guy in Plymouth was not responding. The problem is new to me. My first fuel injection system. Maybe you have an idea.
   My 88 ply, reliant was running so rough I could not drive it. I checked the codes and it said my automatic idle sensor had a short. I replaced the ais and found the the wire harness was shorted due to heat. Respiced the wires. Then the car idled so high I could not safely drive it. Tried letting it run so the computer could relearn the mix but it never lowered. I rechecked the codes and I still had the asi code coming up, but a new one added to it. The tps--throttle position sensor.I put in a new tps but it changed nothing. The butterfly in the throttle body is fully closed. I can not find any vacuum leaks of any significance--vacuum purge seloid should not cause a racing idle. Can you suggest anything?

Answer
Really not familiar with this model's specifics. But if the wiring was shorted, it may possibly have done damage to the computer. Not really sure. Get a manual and look at the wiring schematic recheck the wiring to the idle air valve to make sure it's correct. Also check your coolant temp sensor for the fuel injection system to make sure those wires are ok. You may also try wiggling the wiring harness as it is idling and see if there is any change. If all this doesn't work, try disconnecting the battery overnite and retry in morning, may ned to clear memory in computer.....sorry couldn't be of more help.