Shawna Posted October 19, 2019 Share Posted October 19, 2019 Hi again, could it be a vacuum, car idles around 700-750 cold but once its warmer the RPM creeps up to 900. Regards. Link to comment Share on other sites More sharing options...
Leicestershire Posted October 19, 2019 Share Posted October 19, 2019 900 rpm is around the desired speed for a warm engine. It sounds more like a problem when the engine is cold. As a staring point, check the auxiliary air valve and cold start valve. Link to comment Share on other sites More sharing options...
Shawna Posted October 20, 2019 Author Share Posted October 20, 2019 900-950 feels accelerated. Not sure it's normal. Link to comment Share on other sites More sharing options...
SilverWT Posted October 20, 2019 Share Posted October 20, 2019 5 hours ago, Shawna said: 900-950 feels accelerated. Not sure it's normal. That's OK for an SC, the problem is people get used to modern cars with smart electronics that give low idle speeds. 22 hours ago, Leicestershire said: It sounds more like a problem when the engine is cold. +1 Mark Link to comment Share on other sites More sharing options...
Merv Posted October 20, 2019 Share Posted October 20, 2019 Mine idles at 900. My old 356, well it just ticks over around 600 😁 Link to comment Share on other sites More sharing options...
longman Posted October 20, 2019 Share Posted October 20, 2019 800/850 idle, goes up to 1k revs when v hot , is this the ecu adding more engine fan ? Link to comment Share on other sites More sharing options...
SilverWT Posted October 20, 2019 Share Posted October 20, 2019 2 hours ago, longman said: 800/850 idle, goes up to 1k revs when v hot , is this the ecu adding more engine fan ? No ecu in an SC Paul. I don't think a 3.2 ecu is that "smart" either. Mark Link to comment Share on other sites More sharing options...
longman Posted October 21, 2019 Share Posted October 21, 2019 7 hours ago, SilverWT said: No ecu in an SC Paul. I don't think a 3.2 ecu is that "smart" either. Mark It was posted in 3.2 Carrera 🧐 Link to comment Share on other sites More sharing options...
SilverWT Posted October 21, 2019 Share Posted October 21, 2019 17 minutes ago, longman said: It was posted in 3.2 Carrera 🧐 Sorry too much red wine! Link to comment Share on other sites More sharing options...
proporsche Posted October 21, 2019 Share Posted October 21, 2019 adjust your fuel mix and clean you idle control valve.. ivan Link to comment Share on other sites More sharing options...
Shawna Posted October 21, 2019 Author Share Posted October 21, 2019 No its a 3.2 now sold the SC. Yes its 800 goes up to 1000 when hot. S Link to comment Share on other sites More sharing options...
mean in green Posted October 21, 2019 Share Posted October 21, 2019 I can't help with the problem unfortunately, but speaking generally what is the importance of 900RPMs at idle - am sure there is a good reason (mixture?) but it has always seemed a little high to me? Link to comment Share on other sites More sharing options...
Phill Posted October 21, 2019 Share Posted October 21, 2019 I believe it is supposed to be 850 + or - 50. TBH I prefer mine about 950 - 1000. Things might change after my rebuild though. Link to comment Share on other sites More sharing options...
Slocs Posted January 31, 2020 Share Posted January 31, 2020 Sorry to bring up an old topic - my '86 3.2 does exactly this when the oil cooler thermostat opens. Link to comment Share on other sites More sharing options...
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