DamanC Posted February 11, 2009 Share Posted February 11, 2009 Funny one this. Just had a new bling inlet manifold fitted. As a result, the car now idles higher (when warm) at around 1000RPM as prevoiusly it was about 600RPM. The gear changes are also different; On a very steady drive my autobox would change from 1st to second at about 2kRPM, now its more like 2.5KRPM. Most noticeably 2nd to 3rd is from 2.3KRPM at about 3.5RPM! Gear changes are also considerably sharper and harder. Moving from P to D can also be sharp and simply concerning. Any ideas? Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 11, 2009 Share Posted February 11, 2009 Air leak on the manifold would cause the idle to raise and i doubt that would help with smooth gear changes, you could pressurise it to see where its coming from. Quote Link to comment Share on other sites More sharing options...
DamanC Posted February 12, 2009 Author Share Posted February 12, 2009 Humm, not something I could really do Quote Link to comment Share on other sites More sharing options...
D8MOA Posted February 12, 2009 Share Posted February 12, 2009 throttle position sensor not adjusted right? Quote Link to comment Share on other sites More sharing options...
DamanC Posted February 12, 2009 Author Share Posted February 12, 2009 throttle position sensor not adjusted right? That was something that I thought. Apparently the garage that fitted it said, "we can adjust the TPS when we fit the new one for you". is it something I can do? Quote Link to comment Share on other sites More sharing options...
mikeyb10supra Posted February 12, 2009 Share Posted February 12, 2009 I would suggest checking for leaks as Jamie mentioned...maybe one of the connecting pipes Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 13, 2009 Share Posted February 13, 2009 That rpm increase certainly sounds like a vacuum leak, or possibly an idle control issue. Check pipes, check plugs If your TPS is incorrectly adjusted in one direction it'll never trigger the "throttle off" switch in the sensor, so the ECU will never think you're completely off the throttle. This will manifest itself in a tendency to stall on liftoff/coastdown (perhaps masked by your high idle issue), and injector cut won't take place when coasting down as wll, so you'll burn more fuel and hear a nice burble out the exhaust. -Ian Quote Link to comment Share on other sites More sharing options...
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