Radio - Noise on AM Band During Acceleration
Bulletin 86-9-8Date
Mar. '86
Ref. No. 86-060-9
SUBJECT: RADIO NOISE ON AM BAND DURING ACCELERATION
MODELS AFFECTED: 1986 CENTURY, LESABRE, ELECTRA AND RIVIERA WITH 3.8L SFI ENGINE (B & 3) 1986 REGAL WITH 3.8L SFI TURBO ENGINE (7)
If a condition of a buzz noise during acceleration is noted in the radio speakers on AM, the Electronic Vacuum Regulating Valve (EVRV) may be at fault.
Internal radio noise suppression was added to the EVRV. Replace old EVRV, Part Number 25522717, with new EVRV, Part Number 25527186, which has added noise suppression. If vehicle already has EVRV, Part Number 25527186; then the EVRV is probably not the source of the noise.
Be sure to follow applicable diagnostic procedures in the Chassis Service Manual.