well when I started my car today noticed that when I reved my car a little the rpms would go up and when they came back down it went real low and almost wanted to die and the lights would dim. So I left my car running and disconnected my battery and it still ran which would mean the alternator is working fine (correct me if I am wrong.) So is this an early warning sign that I need a new battery or is this a total different problem? Any help would be great.

 

check for a vacuum leak

 

dont mean to be dumb but where should I check and what should I use to check it?

 

gets some carb cleaner and while the car is at idle spray your vacuum lines one at a time and if the car acts as if it wants to die there you go.

 

I dont think it could be a vaccum leak because my idle is normal its just after i rev it it drops down real low then returns to normal idle i heard (CORRECT ME IF I AM WRONG) that a common problem is your idle will go up and down repetadily if you have a vaccum leak.

 

that is one problem associated with a vacuum leak, but a vacuum leak can cause other problems depending when the vacuum is hooked up to.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by solareclipseauto &raquo;</TD></TR><TR><TD CLASS="quote">check for a vacuum leak</TD></TR></TABLE>


+1

 

are all the vaccum lines coming out of the IM?

 

or is there more ???

 

If the lights dim when the car revved down then it can't be a vauum leak, most likely its your battery or alternator thats about to go. Have you checked your ground connections? Make sure they're snug as well.

 

ya i checked my alternator by unplugging the battery while the engine was on and it still ran. so i think its the battery. Im gonna get one.

 

you might wanna check your idle control valve also