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Ted G.
Ted G., ASE Certified Technician
Category: Car
Satisfied Customers: 6138
Experience:  20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
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1998 buick regal: i had a bad mass air flow sensor..warms..runs fine

Customer Question

I have a 1998 buick regal i recently had a diagnosistic test done and it said i had a bad mass air flow sensor and a bad oxygen sensor I changed both parts but my car is still jumps at start up when it warms up it runs fine but my service engine light is on and i have had it reset it comes back on and the diagnosic says it the oxygen sensor HELP!
Submitted: 8 years ago.
Category: Car
Expert:  Ted G. replied 8 years ago.
It sounds as if you may have a vacuum leak, possibly at the intake gasket or the hose rom the mass airflow sensor, that is causing the car to run lean.