1993 Bucking Up Hill

[OldsBuickGuy82]

1993 LeSabre sometimes does a jumping/bucking thing when heading up hill. It doesn't always happen. Any idea what might cause this?..167,000 KM (not sure what that is in miles) on engin and transmission.

Thanks

[maxwedge]

Originally Posted by OldsBuickGuy82

1993 LeSabre sometimes does a jumping/bucking thing when heading up hill. It doesn't always happen. Any idea what might cause this?..167,000 KM (not sure what that is in miles) on engin and transmission.

Thanks

Lots of possibilities here, bad plug, wire, coil, too lean a mixture, torque convertor clutch slipping, got to do addt'l diagnostics. Miles is .62 x KM's.

[imidazol97]

Mine did that at about 90K miles with bad plug wires and needing new plugs. AND if I recall correctly I had the dealer put in an updated ROM in the computer that adjusted the torque converter lockup speed to a higher speed. Because it's a solid connection through the locked up torque converter, you feel the least roughness in the motor just like on a manual transmission car. I believe the new chip also adjusted the mixture some but I don't know that for sure. It did increase the minimum lockup speed.

I'd get original equipment quality wires on that car if it's had replacements that were the superdooper blue or red type wires from the local box store. I'd put original AC plugs in it--whatever they recommend on the books now at Advance or PepBoys. Then see what you've got.

IIRC I thought I probably had an EGR valve acting up. But that wasn't it at all.

[OldsBuickGuy82]

Thanks!