scottyp Posted March 21, 2015 Report Share Posted March 21, 2015 Hi everyone. I'm having some trouble with my 2001 Ford Mustang Gt. It has cold air intake, exhaust and a typhoon intake manifold. I noticed while driving my my rpm's would go up and down by itself and my idle in Park and neutral only would be high (1000-1200 rpm) I decided to clean the throttle body and maf. Next day I get a p1506 engine code (idle air control over speed error) Cleaned iac. Didn't fix it Replaced pvc hose and all the other hoses. Didn't fix it. Replaced idle air control valve. Didn't fix it. Cleaned throttle body and maf again. Didn't fix it. Did idle relearn. Didn't fix it. Checked iac connector with voltmeter meter and it was good. Took iac valve back and replaced it with another one just incase I received a bad iac. Didn't fix it. (I'm reseting the engine code with my obd2 device everytime I try something to fix it) I'm not sure what else to try. I'd rather try and fix it myself and save some money instead of taking it to a shop so any help from you guys is very much appreciated! Thanks! Link to comment Share on other sites More sharing options...
Zach Posted March 21, 2015 Report Share Posted March 21, 2015 Check the throttle position sensor voltage closed it shouldn't be higher than .99 and around 4+~ volts wide open throttleSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
scottyp Posted March 22, 2015 Author Report Share Posted March 22, 2015 Okay I'll check that Link to comment Share on other sites More sharing options...
Blackmage Posted March 23, 2015 Report Share Posted March 23, 2015 http://www.sn95source.com/topic/5191-high-idle-p1506-code/ Keep it all in one thread, it'll be easier for people to help diagnose and replies wont get redundant when trying to help ya out! Link to comment Share on other sites More sharing options...
