hey everyone, im not sure if this is the right section, if not im sorry.

just to describe in details what my car is doing here you go...

sometimes my car doesnt sound right when i start it, and the cars idle will be really low and it feels like my whole car is shaking, and then it will go to normal and start to warm up. also if i am at a complete stop or low speed and turn my a/c on the car will start shaking and it feels like it wants to turn off on me but when im driving at around 40+ mph i can turn on the a/c and the car will run normal. idk this is just weird to me. i had to speed a little past a stoplight because the light turned yellow while i was in the middle of the intersection but then i had to slow down because of traffic and my car turned off. any ideas??

idk if this has to do with it but when i bought the car it has an alarm but the people did a sh****y job wiring it, and when the car feels like its running bad the alarm noise when i go to lock my door or open it, it will be really low, but today for some reason it was loud and normal and the car started fine and was running fine, but now one of my markers in my headlight is out, idk if this all has to do with one thing or more than one... im sure tomorrow it will start running bad again :/ i also smell fuel and i feel like its wasting a lot of gas latley, but not sure mabe it could be me just worrying...

any ideas on what all this could be from and how to fix it or what to do?

alternator?
bad wiring?
a/c belt?

those are the 3 things i thought could be a possible reason but i'm not sure, your help is appreciated!!

Thanks Mike

 

Are you running a BOV or recirculated?

My car did everything you mentioned until I found and fixed the boost leaks and vacuum leaks. I'd start there.

 

check for the wiring in the kick panel driver side. corrosion
check for vaccum leaks
check battery voltage at idle should be 13v-14v when at idle and at a load.
any codes pending of check engine light

 

SOunds like your battery is dying.

 

thanks everyone i will try it today and check everything, when i bought the car awhile ago i found out he cut the check engine light so i will have to rewire that also -_-

 

there is an idle kick-up switch in most ac systems that raises idle when you increase load on the engine, such as when the ac compressor turns on.

would check to see if the switch is outputting signal, or if there is an issue in the iac (idle air control) circuit.

 

May need ISCV adjustment in the ecu, or the IAC itself is shot. Your symptoms in the beginning of OP and with A/C on really sounds like it.

Did you just recently purchase the car? Or did this issue just come up.

 

i k ow the idle is suppose to jump but not go down when i turn the a/c on, which is why im confused.



Thanks!! will check. and io purchased it about 4 months ago but since then i have got almost everything changed or fixed i even got a tune a couple weeks ago.




i checked the battery and alternator and they are both fine, it may be the idle sensor^ i am going to check that tomorrow. Thanks everyone for all your help i really appreciate it!

 

the idle jumps because the system is compensating for the additional load; if this compensation does not happen, idle will drop instead. the ecu should then attempt to bring it back to the acceptable range, which can cause some unusual idle fluctuations.

 

Idle air control valve

 

you are right, makes perfect sense. thanks!

thanks!!

 

So how did you fix the problem?

 

I'm assuming a new iac valve. You don't have to buy the oem $300 one if you don't want to. You can buy the iac from a sebring (parts cross-reference each other) for like $65 and it should fix it. For what its worth a lot of ppl use the sebring one and it works perfectly.