i have a 1997 dodge avenger ES with a 2.5L v6. im wondering if my EGR Valve could be bad i get about 14mpg on gas. my car has a poor idle but will not stall idle gets kinda bad if the airconditing is on. I did a complete tune up and yes it was done right. and i changed my Idle air control valve. after i changed the valve i drove a few miles and i got a check engine light for insuffecient EGR flow but then it went away and never came back. I took the valve off and cleaned it with carb cleaner. im trying to find out why my ide is kinda poor and if the car sits a few days it takes a little longer to start.my motor has 142k miles but has been properly maintained.
you might want to check you egr lines. they may be blocked. not just the valve. also check your O2 sensors and make sure that they are operating properly.
you should be getting way more than that on gas mileage at least on the road anyway,a bad egr valve will cost you around 3-5 miles per gallon if its leaking and doesn't seal of when it should, i went through this with out stratus ands its 2.4.it got real bad mileage,cleaning the valve didn't help it none at all, i went to a salvage yard and got a used one off a blown engine to try it to see if that would help it and the mileage came back up on it so i replaced it with a new one,you should average about 15-17 in town with that one and around 21 or better on the highway if its running right,id try that if everything else is right and you have double checked for codes and don't get any but the egr valve you don't have anything too loose,if you have had it scanned and dont come up with any other codes it would about have to be that or really low compression on the engine causing that too happen,a weak fuel pump believe it or not will cause one to get really bad mileage and run and idle bad also,and this is often over looked as a possibility,check those things if its not them we,ll figure out whats causing it,good luck.
The EGR must be closed at idle and open as you cross quicker. If your EGR have been caught closed, it could don't have any final result on driveability. If your EGR is caught open, probabilities are it in most cases may not idle for lengthy earlier than dieing. I could blank the MAF sensor placed simply after the air filter out. Use BrakeClean spray. You did not say whatever approximately the gas injectors. I could placed an injector cleanser within the tank (it would possibly not support however its inexpensive than exchanging them). You would dispose of the spark plugs and notice if any seem discolored indicating a persistant pass over. This would point out the cylinder or cylinders with disorders similar to plugged injector, dangerous coil, something.
