My car will start on occasion when it does start it has blue smoke coming from exuast ... while warming up the car will not idle but then sometimes it will stay at 2000 rpm when warm it bounces idle anywere from 750 to 200 it all depends its really acts as it has its own mind ......... the other day I test drove it and at 3800 the car broke up very badly ........ I have a n 332 ecu also what would cause my car to sometimes turn over fast and other times barely turn over ...... I refuse to get rid of this car I just need guidance thanks to all in advance

 

The idle could be a zillion things. Have you done any maintenance to the intake manifolds of vacuum lines?

The 3800 breakup is most likely grounding issue.

Also check and/or replace ur battery and get back to us.

Also look at ur plugs

Blue smoke means oil.