Sometimes a failing injector can be subtile, and may not show up as a code
for a month (sometimes just a rough cold start and otherwise undetectable
other than being somewhat down on power).  But the third one that failed
on my 95 was rather abrupt.  When I started out for a trip to WI, I
noticed a regular miss under load at low rpm, and the check engine light
came on within 120 miles.  Although, I had no trouble getting back to IL,
before getting it fixed.

A co-worker mentioned that he had regular injector problems with older Z
cars.  My 1st failed under warranty, and third failed approaching 10
years, 110k miles (95 SE 5 spd purchased May 94).