95riviera- trust willwren on this.
The very first thing you need to do now is get a scan tool and check KR. I almost bet you get getting a good amount even with that 2.5 because 2.8 is stock.
My car ran Great and got 0 KR with the 2.8, as soon as the 2.55 went on i got KR and it got pretty bad at higher RPMs And the car got slower when over 60% throttle.
as soon as i put the 2.8 back on it got faster and KR is gone.
Get a Scan tool and check for KR i bet you have some or a lot.
94 SE -197K, Dead- Parting out...
95 SSEi -133K, Fog light over Ride, INTENSE FWI, 2.55 pulley (2.8 for now till the KR is fixed lol)
-Ryan &; CB Handle: Bandit ..