First off i have a 1990 rs v6 camaro tuneport.ill begain with how it all started, i ran the battery down, then for some reason i had to replace a jumper in the security system, and it all went down hill from there. now,setting there ideling its turning 3 grand in drive,and between 3000 and 3500 in park. i replaced: fuel pump, fuel filter in tank, ignition module, both coils, suposed to of had the distributer rebuilt, but not sure if the shop done it, cause when i removed the cap to replace the ignition module the roter and everything had rust on it. but also i replaced the o2 sensor, map sensor,other little things. but for one, when the mechanic put the coils in, there supposed to be grounded to the block, and he left them loose for a bit while we continued to troubleshoot. but wasnt drove with them loose, just fired up a couple times. but the rpms run that high idoling but driving 35mph it turns 4500 rpms. and itll redline every time before changing gears. and if you floor it it revs up to much and goes no where. it will not even powerstall in gravel. and for some reason when the car is turned off, the tach still reads 3000 rpms.