GM / General Motors: 94 Buick LeSabre hesitates or stalls

My 94 LeSabre runs well and smoothly, except: Almost always after it has run
for a while and therefore has wormed up, it will hesitate as if running out
of gas or spark plugs aren't firing. It kind of stumbles. Sometimes the
engine stops for half a second and then works OK again, other times it does
this several times in the space of 2 or 3 seconds, then it will work OK.
Rarely, it will stall when stoped at a trafic light or starting to go from
it. Even more (very) rarely, it will stop when going. However, it will
always start right after the stalling and work OK.

A month ago I replaced the EGR because there was a trouble code present.
It's OK now. The fuel presure is OK. No error codes present. Several days
ago I cleaned the back of the ignition module (under the distributorless
ignition coils?) and for 2 days I thought the problem was fixed, then, it
happened again.

Any ideas on what may be causing this?

Thank you

Antonio

Might also be the Oxygen sensor cycling slowly. I've had this on another
vehicle -- usually easy and inexpensive to replace


"Joseph Oberlander" <net> wrote in message
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