SES light was on Dtc 506 Idle Air Control System RPM Lower Than Expected, freeze frame eng rpm 489, tps (%)14.1, ect(f)192 I'm not sure but I think it was in park during freeze frame capture. I have cleaned inside of throttle body around throttle body butterfly, have checked for vacuum leaks but none found, air filter is clean. Right now at normal operating temp rpm is between 750-908, TPS 14.5 (%), ENG temp 192(F).Code has not set after clearing code.
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2005 Ford Expedition
Question: What is the normal rpm at idle in park when engine reaches normal operating temp
Answer #1mastertech6371 September 28, 2011, 20:20Master
600-800. the code is telling you the iac motor is not functioning as it should.
Replyredmallard, September 29, 2011, 06:54Rookie
Where is the IAC motor located? There is nothing behind the throttle body I looked 5.4 eng.
Replymastertech6371, September 29, 2011, 07:21Master
top of the motor behind the throttle body.