98 S90 below average performance?
#1
98 S90 below average performance?
Help all, I’m new to the forum and to the Volvo world somewhat. I have recently acquired my first Volvo, a 1998 Volvo S90 with only 128k miles on it. A couple of things I’ve noticed after owning it for about a month now is I occasionally will get a random stumble or miss at idle that last maybe half a second and goes away. Sometimes it’ll do it twice consecutively and go away. No CEL however, and I also noticed it seems a bit sluggish in acceleration especially from a stop but even in general, especially at higher rpm. I don’t know what these are capable of performance wise but it just seems less than it should...
I’m getting 17-18 combined (mostly city) and I checked my fuel pressure and it was about 45 psi or so which I read is where it should be. Any help would be appreciated.
I’m getting 17-18 combined (mostly city) and I checked my fuel pressure and it was about 45 psi or so which I read is where it should be. Any help would be appreciated.
#3
it had original volvo plugs in it which had no tip, replaced them with NGK platinum plugs with the correct gap and it made minimal change. I’m wondering maybe fuel filter, and/or clogging cat possibly? (From low quality and/or not using premium fuel?)
#4
#5
im aware of the power difference after 95 for emissions and the change in cams etc. but it still seems slower than others I’ve seen in videos and than what they’re rated for. I did a 0-60 one day and it took like 10+ seconds timed with a stopwatch
#6
"The 1998 Volvo S90 Base accelerates from zero to 60 mph in 8.8 seconds and hits quarter mile at 16.6 seconds." Courtesy of
https://www.mycarspecs.com/car/1998-...ads=0&engine=0
https://www.mycarspecs.com/car/1998-...ads=0&engine=0
#7
"The 1998 Volvo S90 Base accelerates from zero to 60 mph in 8.8 seconds and hits quarter mile at 16.6 seconds." Courtesy of
https://www.mycarspecs.com/car/1998-...ads=0&engine=0
https://www.mycarspecs.com/car/1998-...ads=0&engine=0
and of course my random stumble or miss that last a split second that I get occasionally at idle.
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