changed oxygen sensors, wires, plugs, car runs poorly when warmed up could problem be mass air sensor on 2002 buick lasabrec
car ran great until recently ran good when i started up after new parts but started running bad and almost stalling when warmed up
Check your IAC Valve. Could be bad and causing the bad idle.
Search Buick LeSabre Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Buick LeSabre Experts