Erratic idle on 1996 dodge avenger

dodge
avenger

#1

My 1996 dodge avenger started idleing erraticly and stalling sometimes if I dident maintain the idle with the gas pedel. I did some research and thought it might be the idle air control valve. I took out IACV and cleaned it and the problem was solved for a couple of days before it started doing it again. I then replaced the PCV valve and again the problem was solved for a couple of days before it started back up again. The next thing I want to do is replace the IACV but don’t want to spend the 75$ before im sure thats the problem. Does anyone have any idea what the problem is? Thank you for the help.


#2

Check for vacuum leaks as wellaround the intake, vacuum lines, etc. Is the check engine light on? If so, have you had the codes pulled?


#3

The check engine light has never turned on. How would I check for vacuum leaks? With soap and water?? Thanks for the help.


#4

The next time it idles erratically, tap on the IAC valve with the handle of a screwdriver. If doing this effects the idle replace the IAC valve.

Tester


#5

I usually use WD40. Just spray lightly onto vacuum connections and around intake gasket(s). If the idle drops at a certain spot, there is a leak.

Just be careful not to spray any electrical components or plug wires/coil packs. don’t want to start a fire


#6

Do not use soap and water. The vacuum - as vacuums do - sucks stuff in. If you do that and have a leak you’ll be sucking soap & water in. Lots of people use carb cleaner or something like it. WD-40 is fine. I use an unlit propane torch. A good and wise mechanic will find out whether or not to bother with a vacuum gauge.

My guess, however, is that you’ll get farther giving the IAC a whack as Tester suggested below. In addition to actually whacking the thing, also jiggle its electrical connector to see if anything happens. If it shows definite signs of being involved I would put a multimeter on it first to make sure the power supply is right (i.e. first verify that you don’t have a wiring problem. Autozone’s website has online repair manuals that should give you the voltage specs. Go there, register, plug in the cars info & find the repair info section.