is it a bad heater core? works fine when driving around but sitting at a stop light or something it gets cold...any ideas?

 

air in the system

 

in the ac lines? im new to this so dumb it down a bit lmao

 

as weird as it sounds, check your coolant. I had no heat at all, and figured out it was from very low coolant. I filled it up and i had heat again

 

i understand that. it was the first thing i checked lol. still full. its been like this for about a year now but i didnt need heat when it was 90+ outside lol. been really cold lately and im comin up with some money soon so i can afford the repair whatever it is lol...

 

there is air in your coolant line. It needs to be burped

 

is that really all it is? glad its tomething small. isnt burping our systems a pita?

 

Burping a lot of cars is a pita. When i used to be a mechanic a trick i used on a lot of cars was while running it to try and jack up each side of the car pretty high to get any air in there to move around, it usually sped up the process. Worked on cars from cavaliers to celicas to lincoln ls's. I just got the Z so it'll be a while before i do it on this car.

 

I had the same problem a couple of weeks ago. i did a search on here and found an easy fix. Ok so here is what you need to do, find a hill that you can park your car on around 10-20 degrees will do. make sure that your front end is parked at the top of the incline. screw off your resevoir cap so that air can get out but leave it on top of the opening so air can't get back in. get back in your car while parked and rev motor up to 3k for about 30-45 seconds. go drive your car around for about five minutes. you may i have to do it a couple of times to get all the air out. it worked for me and should work for you.

 

Another great thread....will be tackling this issue soon.