86 560SEL exhaust fumes
When sitting at an idle the fresh air / ac system on my 56 SEL is sucking engine fumes heavily in to the cabin. Opening the windows or sunroof open only makes it worse. Engaging the recirculating air button on the dash makes no differnce either. I researched this site and looked at the EGR valve as one letter said , but mine is new, not soot covered & appears to be doing its job .I have a new exhaust system too, no audible leaks-very quiet. I taped over the vent betweeen the windshield and hood to see if that would stop the fumes, but its still bad. Does anyone know of any other vent openings for the air system that would be allowing the engines fumes in ?HELP!!!!!!!!!!!!!