2.4 cylinder just bought it, has rough idle and will die at idle when defrost is on, or coasting like on interstate, runs well when on gas, but when let out or at a light will die, just done plugs wires, and iac valve, no difference, egr seems to be working as when its running i cvan depress it and it will die, any help ? has 130k runs good everywhere but idle, also has no codes as i have a scanner, no cel????

 

sounds like a fuel problem since your not getting any codes,try your fuel filter first,not an expensive part, but some ?
prior to the perches was it sitting for a long time, was it doing it when you first drove it or after a while of you driving it,have you put gas in it,I ask that because gas dont stay stable,
First thing I would do is change fuel filter and put a fuel additive to clean the system and if that dont work see if your getting good fuel presser,if not all that it may be your injectors,but first things first fuel filter and a good fuel injector cleaner thats the first rout,let me know how that works out,by the way did you give it a full tuneup ?

 

done it when bought they said it was iac so i changed it, did rund additives in it and heet, nothing changedm as said runs gresat when accelerating, just wont idle ??

 

wouldnt think it would run smooth 80 miles n hour if fuel problem, as said runs like a new 1 until let off gas pedal

 

A fuel filter will not make any difference. 2 things. If its clogged. U won't be able to 80. Let alone get up to 80. U would not be able to start and run the. Drive it for a few days. Then get a good scanner hooked up to it. Not a cheap one from a parts store either.

 

just sold it