Help!! my mustang has a really ****ty idle, i dont have a clue what is wrong.

[venomm95]

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please help me
my car has a real ****ty idle, it idles around 250 RPM, yes that is two hundred and fifty, in the middle of 500 and 0 RPM. when i hit the throttle, the engine doesn't rev until i let it out. My bro said that i was throwing some codes, i just wanted some other opinions before i started messing with it.
Thanks everyone for your help.:SNSign:

 

[Adam95GT]

Check the codes... posibly turn up the idle and maybe yout TPS

 

[cbarr300]

250? our cars can still run at that rpm? lol

I'd definately check your tps.

Have you recently done anything to your car or is it just "from out of nowhere."

 

[95opal]

pull the codes and try setting you idle
http://www.muscularmustangs.com/idlereset.php
good luck

 

[1TallMF]

Wow, mine would stall at anything below 500...
Yeah get the code, otherwise we will just make you run in circles.

 

[HISSIN50]

You're seeing the inaccuracy of the factory tach. It won't idle at 250 RPM. This is why mechanics use a diagnostic/mechanics tach instead of the stock one when setting idle. My OEM tach (as best I can interpolate it) reads ~150 RPM+ off from what the computer sees.


Another vote to have the computer provide clues. Pull codes.

Good luck.

 

[MI95Cobra]

check your timing...put it on a timing light....it should be around 14deg.....

 

[venomm95]

Thanks everyone for your replies. i checked the codes and my mass air meter wasn't working properly and my throttle body wasn't working.

 

[BadAndy]

take the mass air off and clean it with carb cleaner and do the t-body also

 

[HISSIN50]

Peoples' advice will vary depending uipon the exact code you got and when you got it (KOEO or KOER).
If you clean the IAC, I'd stay clear of products with Toluene.

Good luck.