Hi - this is a great group. It's my first time here.

I have a 1995 GLE, ~124,000 miles.  Original owner, no trouble with
the car until recently.  In the last 8 weeks, injectors 2 & 5 failed
and I had them replaced with no probles.  The failures were signalled
by rough running and the MIL light.  I pulled the codes from the unit
under the center dashboard and the codes told what the problem was
diagnosed to be.

Early last week, the MIL came on again, but the car ran great. I
pulled the codes again and got 3-4 (knock sensor) and 3-2 (EGR system
hi/low flow). I took it to the dealer to have it checked out and they
got the EGR code but not the knock code. They looked at the EGR system
and exhaust system at least, and found nothing wrong.

After a day & 1/2 of checking the car, they still couldn't find
anything.  They reset the light & said that they thought it was just a
fluke and probably wouldn't recur.  After I drove 328 miles in
numerous key cycles, the light came back on.  It's sending only the
EGR code now. The car is running just great, and if not for the light,
it wouldn't appear that anything is wrong. I'm taking it back to the
dealer on Monday again for a 2nd look.

Does anyone have any idea what might be going on here? I looked up the
EGR code in a index I found at Maxima.org, and it appears to cover a
lot of ground.  But the dealer's techs just aren't finding anything
wrong with the car.  The two times this error code/light have occurred
it has been on the 2nd or 3rd trip after a fillup.  Gas cap is tight
and dealer said it was holding pressure well.  I haven't changed the
gas I'm using either (Shell Premium). I'm just trying to get some
different ideas here.

Help!

Thanks!
Rochelle