after i have been on the freeway for like 10 mins or so, at about 3,500 to 4,000 rpms in 5th gear, the car will sound like it might be misfiring, or sputtering once the rpms come down to like 2,500ish and it will just sputter, unless i downshift and get the rpms back up again. any ideas what can cause this, my CEL is on, but im pretty sure its just for a very small EGR leak. my car idels almost perfectly too.. any idea?

1992 Plymouth Laser
-Bone stock for now.

check/replace plug, wires, coil in that order untill you solve your problem

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2011 Nissan Xterra Pro-4x

2007 Kawasaki Ninja 650R

1996 Mitsubishi Eclipse RS-NX 75 shot, AEM CAI, P&P t/b and intake mani-SOLD

1964 Buick Electra 225-all original, all power options, 325hp, 445ft/lbs tq

but i have already done that multiple times....

currently have:
MSD coil
NGK Plugs
MSD 8.5 mm wires

1992 Plymouth Laser
-Bone stock for now.

I'm having the same problem once in awhile and it is because my O2 sensor is comletely shot. Give that a check.

98 eclipse gs
star stage 2 w/ bb, 8.6:1 je pistons, eagle rods, web turbo grind cams, udp, clutchmasters aluminum flywheel, clutchmasters stage 3 clutch, hks aic 3, 8 injector setup, phantom grip lsd, datalogger

hey, it was drenched in burning oil, before when my valve stem seals were bad... im gonna go replace mine, since i have a lifetime warranty ill see if that could fix it.

1992 Plymouth Laser
-Bone stock for now.