I have a 1989 daytona that was originally a 2.2 turbo II 5-speed. The engine had a rod knocking and other various issues so I decided to swap a good 2.5 turbo 1 engine from a 1989 plymouth sundance into the daytona while still using the intercooler originally in the car. the sundance originally had an automatic but now its hooked up to a 5 speed could there be any problem there? I assumed that everything would be plug and play and it has been until today I fired up the engine and I put it into timing and it idles in between 1500-2000 rpm (my tach doesnt work). it will not come down at all even after warming up. I tried retarding it and it runs but it has a miss. I replaced all the vacuum lines and hooked up all the lines correctly according to the diagram.the plymouth sundance ran fantastic so I dont believe its any sensor/relay. I even adjusted the idle screw on the throttle body and the idle went down a smidge but barely anything at all.I have no idea what to do. I need a daily driver and I guess I could just leave it retarded but if any of you know why it could be doing this I appreciate any info.