I have a 75 2002 that i swapped a (1990) m20 with g260 trans. I Have been working on this car for the past 10 months got it running about 2 days ago. The problem i am having is it wont idle for the life of me. when u crank it up its starts out as High idle for about 8 seconds then it just immediately revs down then revs back up and just doesn't stop in that sequence. I tried swapping parts with my convertible that runs fine. I tried swapping air flow meter, Idle control valve. I looked for vacuum leaks with brake clean could not find anything. I also Put all new seals and gaskets except for the head gaskets have all new relay's (main,fuel,02) New crank sensor, timing belt exc. I am using the 173 ECU (dme). bosch 044 fuel pump. If their is anyone that could help me out or point me in the right the direction i would greatly appreciate. thanks.
-Andrew