Expert: Sean Halliday - 12/17/2007

Question
I have a 92 accord the problem is at idle it reves from 1000 rpm to 2000 rpm put it in gear stays at 1200 rpm I changed the 3 sensors on the intake and it is going though a lot of gas I might get 25 miles to the galon please help thank you

Answer
Check the fuel pressure regulator and look for vacuum leaks.Do the usual checks for ignition timing and vacuum pressure with a tester and timing light.With this problem there is no specific cause but with a very high idle its usually a leak at the intake manifold.A test with a vacuum tester will tell you more.An easy test for a leak is spray some soapy water from an old windex bottle around the intake and if the idle drops then thats the problem.You have a leaky intake gasket.