fkumro

So my girlfriend has a 2000 Sentra GXE 1.8ltr and in the past has beat the shit out of it. The car was unable to run and we replaced the MAF/Cam Timing Sensor (believe that is the correct name)/Coolant Temp Sensor/Both cats + 2 O2 sensors/Flex Pipe/1 Coil. After all this the car runs and has power but it has lots of lag once you step on the gas (at highter mph). Sometimes it doesn't even downshift (Its an AT) and others it just climbs very slowly and then feels like it slips. Any idea on what this could be? Transmission issues? I dont know if the tranmission has been serviced at all in the last 70k miles (heh)...

Also when just driving around town it feels fine with the occasional shake when at a red light, but the RPM's stay steady.

Thanks!