Several months ago I purchased a 1997 Dodge avenger with <70000 miles on
it. Currently it only has 76500 on it. It ran nice at the time but does
use a bit of oil. About 2 months ago the car started carrying on at less
than 2000 rpm it would miss when given gas but idled smoothly and above 2k
rpm would run smoothly or at least I didn't notice a miss initially but the
rpms that it would be noticable on started to creep up.
I figured that this was probably spark plugs and bought a set of the basic
Bosch platinum plugs gapped them at probably a bit under the about .05 the
car calls for as I only had a .045 at the largest feeler gauge. Anyway
this corrected the problem or at least appeared to. The old plugs looked
ok, what appeared to be normal wear anyway at least on the electrode, the
insulator on the plug looked a bit burnt though where it wasn't covered by
However recently this problem has reoccured. I haven't had a chance to
pull the plugs and look at them but as it has been only about 3000 miles
I'm wondering if there is anything else I should be looking at. I don't
believe that I drive the car in a manner that would cause the plugs to die
this quickly. I also did consider that it might be the fuel in the car and
put about 5.5 gallons of 92 in though I had been using 87 constantly.
The check engine light is not comming on but I have no way to attach the
car to a diagagnostic device without spending a lot of money so I'd like to
avoid that a bit. Unless someone knows a way to read the codes without it
like you could do in most older cars?