Does anyone knw why my car wont stay idle when ive changed spark plugs, fuel pump and filter in my 1992 Buik Roadmaster?
Could be throttle body dirty. You can buy aerosol canned throttle body cleaner, that all you have to do is remove air filter and spray away. Follow directions on can and I have a feeling that's what it is.
it ran better before you did the repairs/tune up???