Car wont stay on.

[edi]

i installed a new battery today because the original one tested bad. now the car wont stay on, or wont stay running. it starts up fine but as soon as it goes to idle it idles real low and rough for a sec and then dies. would it be a bad altinator?

help me out, its killing me.

 

[suprahero]

Have you checked for any codes? That should always be your first thing to do when experiencing problems with your car.

 

[edi]

how do i do that? the car wont stay running. the motor shuts down befor i could get out of the car to jump the diagnostics box.

 

[suprahero]

You put the wire in the diagnostic box first and then crank it.
http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx

 

[edi]

okay... but doesnt the car have to stay running whille the codes are being checked?

 

[BorHor]

nope car actually has to be off lol.

 

[MA70Snowman]

You put the wire in the diagnostic box first and then crank it.
http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx

and don't "crank it", m ake the jumper, put the key in the "on" position and watch for codes.

 

[Anomili]

^^^ supraherowned lol, jp. Thought it up and I had to say it... studying messes with your mind.

Codes will help a lot because it could be any number of things. Since you just replaced the battery the first and obvious thing to check is the connections near the battery. Next you'll want to check fuses, although i don't know what it could be that has blown to cause failure to idle.

Other then that it could be ECU caused... I donno.

Codes will help.

 

[edi]

and don't "crank it", m ake the jumper, put the key in the "on" position and watch for codes.

thanks, i learn something new here every day!

 

[edi]

so, i took the wifes car to work and let the supra sit in the garage. came back for lunch and decided to try to start it up again and do more trouble shooting. well, now everything works as it should. i dont get it, i did no maintenance other than install a new battery. and so i took it to work and its been working fine ever since... what the heck, man!

 

[slidebabyslide]

your supra must not like your garage......... mice?

 

[Anomili]

That sounds to me like a loose connection somewhere.... or more realistically gremlins. Everyone has them, it is only a matter of time until they manifest themselves .

 

[m1supra]

haha let not talk about the gremlins ok evil little bastards

 

[suprahero]

After you didn't crank it..................did you have any codes at all? In my defense, it's been a while since I've had to check codes since I've gone 1j..............:evil2:

I couldn't resist............sorry.

 

[edi]

nope no codes. with the engine on and off.

 

[MDCmotorsports]

If you installed a new battery, then you would need to let the car "re-learn" by taking it down the road for 5 minutes or so.

None of my supras have ever wanted to idle after I killed the memory...