I have a 89 IROC with a 350 TPI. The car has a very bad cold start. If I let it sit for 5-8 hours and try to start it, I will drain the battery. It just doesnt fire up untill I jump it. Another problem the engine surges at ideal and also ideals so bad that stalls out even with the ideal all the way up. I can also here a serious vaccum leak. I have changed the gaskets on the tpi unit and sounds like it is coming from the EGR valve. I have taken two things off the car that have effected the, that is the catalytic converter and the theromstat. If anyone can help me I would realy appreciate it.