A dirty air intake or cracked air intake tube is often the culprit.Ĭomputer Malfunction: If the powertrain control module is malfunctioning, idle speed may be affected. Malfunctioning Throttle: A malfunctioning throttle system can cause both a high or low idle as well as an engine stall. Vacuum Leak: On any engine, a vacuum leak will cause a high engine idle as the oxygen sensor detects lean operation and the engine computer then tries to compensate, which can result in abnormal idle. This part can malfunction due to excessive carbon buildup in the intake manifold. A faulty or blown fuse in other electronically controlled systems can cause the Idle Air Control (IAC) motor to malfunction, leading to a higher than normal engine idle speed.įaulty Idle Air Control Valve (ICV): Some cars are equipped with an idle air control valve to maintain idle speed. The below lists common causes of high idle and in each case, the appropriate vehicle system, components, and parts involved would be inspected, removed for repairs, and/or replaced as needed.įaulty Fuse: In the majority of vehicles, engine idle speed is controlled via an idle control valve (ICV). The repair procedure depends on the exact cause of the high idle. How do mechanics adjust or repair incorrect idle speed? YourMechanic has a dedicated team of mobile mechanics who provide convenient service at your home or office.Service type Engine idle speed is high Inspection If you continue to notice rough idling, talk to a trusted mechanic such as one from YourMechanic, to diagnose the problem. You should notice your engine runs more smoothly with a steady idle. Tip: Don’t start the engine while the idle air control valve is out.Any help would be great, a pic would be awesome Do you have the same problem Yes No Friday, June 13th, 2008 AT 10:54 PM 3 Replies BLACKOP555 EXPERT I would hope the IAC existed Its located on the side of the throttle body. The repair manual doesnt list one, but it definately exists. Fsn520660a, Fsn520660b Additional Info: Compatible With Mazda 626 98-02 / Protege 99-03 Idle Air Control Valve, 4 Cyl, 1.8L/2.0L Eng. 87,000 MILES Ive got the 1.6l and cant find the iac valve. Start the engine and check IAC operation. Buy For Mazda Protege5 Idle Control Valve 2002 2003 4 Cyl 1.8L / 2.0L Engine 2-Prong Blade Male Terminal. Consult the owners manual for a diagram showing the location. 2001 Protg Idle IssueWeek ago purchased 2001 Mazda Protg 1.6L (DX), got this for my ex daughter in law becaue she doesn't have car and my wife has to drive her and the kids around. Reattach the negative battery terminal after everything else is in place. Connect the last two hoses you removed and put the IACV in place. Allow the gasket surface to dry before putting the new gasket on. Step 7: Clean the IACV passages on intake and throttle body. COMPATIBILITY INFORMATION- SCIOO idle air control valve fit for 1998-2002 for Mazda 626, 1999-2003 for Mazda for Protege, 2002-2003 for Mazda for Protege5 HIGH VALUE - Our idle air control valve helps your car boost power and save fuel consumption.
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