Re: Bucking at low speed

>Hi.  I have a 1992 SL2 Saturn.  It has 107,000 miles on it.  For the
>last 20,000 miles or so, it has bucked on acceleration, particularly
>when warmed up.  (It bucks when cold, but only mildly, and because the
>idle is up higher, the bucking is masked.)  At highway speed I can
>sense a miss, but the speed of the vehicle smooths out the bucking,
>and it is hardly noticeable - but it is there.
>I have replaced the plugs, used several bottles of injector cleaner,
>replaced the in-line fuel filter, resistance-checked the spark plug
>secondary circuit, verified that the fuel pump is within tolerances
>published in Haynes, and verified the proper operation of the EGR
>valve and fuel manifold pressure relief valve.  I have also replaced
>the accelerator cable.
>The "Service Engine Soon" light is not on.  There is nothing logged on
>the car diagnostics computer that I can find.
>The car may be getting about 2 miles per gallon less than it did
>20,000 miles ago, but I can't be sure - it gets about 28 mpg today,
>combined driving.  I don't know if this is related, but when I engage
>the cruise control, there is a temporary increase in engine speed and
>road speed (to the tune of about 4 mph), before it settles down to the
>selected speed.  (Settles down in about ten seconds.)  Cruise works
>perfectly after that.
>I am lost for ideas.  Anyone got any ideas?

How old are your plug wires? That'd be next on my list.