Two problems related to fuel injection have been reported for the 1998 Volvo V70. The most recently reported issues are listed below.
Engine has a random mis-fire related to the cpu. Volvo is aware but has not produced any bulletins for an up-grade. Mis-fire can cause stalls at idle in cold weather and has potential to cause accidents due to stalls in intersections. I believe that this problem exists in all 1998 models with the 190hp turbo engine. It is annoying and dangerous.
Intermittent "stuttering" or "sputtering" problem both at idle and at highway speeds. Feels like fuel injection system is misfiring the engine. Car has never stalled, but numerous times when pressing accelerator from stop, sputtering causes delay in acceleration.