fendervg 33 Posted February 21, 2015 Hi all - my car tends to idle high on cold after start up and sometimes I get the dreaded needle dropping when coming to a stop. Could this be a problem with the idle stabilization valve? I've checked for vacuum leaks and all the piping appears to be sound. I don't want to invest in an ISV unless I have to as they are quite pricey. Thanks. Quote Share this post Link to post Share on other sites
fendervg 33 Posted February 22, 2015 Anyone got any ideas? Quote Share this post Link to post Share on other sites
Jim Bowen 1 Posted February 22, 2015 Sounds like it could be the isv. You can take it off and clean it out with a solvent spray and then wd40. You can also check it works with a 12v power supply. Quote Share this post Link to post Share on other sites
robrado974 1 Posted February 22, 2015 I would leave it in carb cleaner for 12 hours , that will clean any crap out . Not sure what your saying about the cold start up ?its meant to run high . Quote Share this post Link to post Share on other sites
Dan_Storm 0 Posted February 22, 2015 They are the same symptoms I had when my ISV failed. I am on my second ISV now (had my Corrado for over 10 years) and both times it had the same sympoms. Probably not easy, but it may be worth borrowing a known good ISV to prove if yours is faulty. Quote Share this post Link to post Share on other sites
fendervg 33 Posted February 25, 2015 Ok - will clean and test the ISV. It idles at around 1000 RPM for a while from cold and then settles down to 640. Is that normal? Quote Share this post Link to post Share on other sites
robrado974 1 Posted February 25, 2015 Yes mine does the same . Quote Share this post Link to post Share on other sites
