AM Radio Noise

Anyone have any information on fixing noise on the AM radio. My 2002 TB is picking up terrible engine noise on the AM stations. I have the single disk bose unit...FM sounds great. Is this a grounding problem? If so where is the system grounded...in dash or elsewhere. Thanks in advance

I guess no 1 has an answer to this ?.i have same prob.i understand that ALL TB's have terrible am recep. Sure would like to hear of a fix for those of us who want to listen to talk radio?
Gary

Its been so long since I posted this, I kind of forgot about it.
I agree, sometimes am stations are the only ones that carry certain sports events too. Is it a radio problem or a problem with the antenna? Anyone have any further info on this?