Subject	My car will not idle at 750
Posted by	JMartz on May 02, 2017 at 7:52 AM
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Message	The engine in my car has a high idle (around 950). This is a recurrent malfunction that I have corrected several times. I recently replaced the ECU's coolant sensor and connector. A bad contact was causing improper temp values to be read by the ECU. The ECU has a table of idle speed vs temp and will only control the idle air control valve correctly within a narrow temp range. This brought down the idle to 750. Idle rpm is back up to 950-1000. I am clear out of options. Timing and MAF voltage are correct. The resistance values of the IACV are within spec. Car has a smooth running engine with no misfires or hesitations. Don't suspect an air leak; but who knows. Any ideas from the experts?
Follow Ups	My car will not idle at 750 - JMartz 07:52:46 05/02/17 Have you done a boost leak test recently? (n/m) - Tanley (ATL) 08:14:35 05/02/17 Never done one. - JMartz 09:01:52 05/02/17 If it is a smaller leak, no. (n/m) - Tanley (ATL) 09:54:51 05/02/17 TPS is also set correctly. (n/m) - JMartz 09:02:41 05/02/17 I assume TPS set such that with a volt setting >> - ZUL8TR 03:55:23 05/03/17 Found problem - JMartz 14:19:03 05/02/17
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