hazyjoker

Hi I just bought a 1988 Audi 90 for 100.00 usd for work, but i got an idle issue when its in drive. When your coming to a stop and the engine get between 1900 rpm and 1200rpms it wants to rev up and down(urr-urr-urr) about 100rpm until you reach about 1200 unless you put it in nuetral then it will stop.
Does anyone have any suggestions, it doesnt affect the performance its just annoying
thanks<ul><li><a href="http://www.freeloadmp3.com/">http://www.freeloadmp3.com/</a></li></ul>

88audi90_Q

try cleaning the isv

hazyjoker

whats the isv?<ul><li><a href="http://www.freeloadmp3.com/">http://www.freeloadmp3.com/</a</li></ul>

88audi90_Q

www.20v.org helps a bunch, when u got problems, waste a few minutes n see if they have it there, alot of info..

clicky on the linky<ul><li><a href="http://www.20v.org/engprob.htm#isv">http://www.20v.org/engprob.htm#isv</a</li></ul>

Ghostfire

Possibly a vac leak check all the air lines for holes or wear and tear.