2005 Dodge Caravan has a miss without a check engine light

For three months my caravan with the 3.3 V/6 has a miss while cruising
at a constant speed, mostly at low speeds (25 to 35 mph) and low RPMs
(1500 minus). No check engine comes on. I've had two different Dodge
service centers look it over and have done the following with no
improvement.
-both spark plugs and wires replaced
-fuel injector flush has been done
No improvement and they have no idea what's causing it. They say that
until a check engine comes on, they won't know what do fix. My concern
is that there is no way to know when the check engine light will come
on and the problem is very slowly getting worse and is driving me
crazy.
Has anyone experienced the same thing and have figured out what the
problem was and more importantly, what the fix is.

Are these Dodge Dealer Service Centers?

For what it's worth, when I worked at an independent auto shop (2001),
the diagnostics software we used was sophisticated enough to do a
"misfire count" while we drove the vehicle. If it was an
ignition-related problem, it sure made the diagnostic end quick and
easy for any Joe in the garage -- and I'd find it hard to believe that
this level of technology (or it's 2003/6 replacement) isn't available
from a computer interface designed to work with Dodges (as opposed to
the Autozone/Midas fault code reading). If it wasn't ignition related,
it was easy for the tech to review the data on the monitor and start
from there.

If the shops have taken the car in and have been able to replicate the
problem, I would have a hard time accepting the 'no code, no fix'
excuse.

If you've been taking it to a lower-level shop (though you make it
sound like it's the dealer...) that doesn't have the manpower or
sophistication to help you, then you know what the next step is.

Jon

dmyhrum.RemoveThis@fbconnectu.net wrote:
> For three months my caravan with the 3.3 V/6 has a miss while cruising
> at a constant speed, mostly at low speeds (25 to 35 mph) and low RPMs
> (1500 minus). No check engine comes on. I've had two different Dodge
> service centers look it over and have done the following with no
> improvement.
> -both spark plugs and wires replaced
> -fuel injector flush has been done
> No improvement and they have no idea what's causing it. They say that
> until a check engine comes on, they won't know what do fix. My concern
> is that there is no way to know when the check engine light will come
> on and the problem is very slowly getting worse and is driving me
> crazy.
> Has anyone experienced the same thing and have figured out what the
> problem was and more importantly, what the fix is.