![]() unplugging an injector causes the engine to run on 1 fewer cylinder so its not a misfire issue. replacing fuel rail and injectors with a spare did nothing Has 135psi compression dry in each cylinder Oil is filled to proper level, no chips in the oil pan I will send free parts for 01-03 Protege to anyone who can fix this problem (I have a wrecked parts car). I'm about to put wheels on it and limp it to the mechanic but the service fee will likely cost more than the $600 i payed for the entire car. When i disconnect and reconnect the electric connector to the EGR, there is no change in symptoms. I heard that if an EGR valve is open it will appear as a large vacuum leak at low RPM. Is the Protege EGR valve normally open or normally closed? I just rebuilt an FS-DE engine for the same car and it does not run for more than a few seconds below 1000rpm when warm. I cleaned the PCV Valve today (Also a couple months new), no change in low idle. What do you guys think it is? I'm having a hard time and need the car for work. And letting off the brake without pressing the gas pedal has a lot of hesitation until I press on the gas. Some people have told me it could be a clogged/dirty fuel injector, but I'm trying to rule out everything else before going there (Injectors are expensive!) (headshakeĪlso, my car isn't violent at idle, there's a slight vibration that's noticable even with my exhaust on. The only code left is the misfire in cyl #3. I cleaned the throttle body (Might have to again since I don't think I did a good job) and I'm having a hard time finding time (and how) to clean the IAC (Idle air control) and EGR Valve. The spark plugs, wires, and coil packs were put in at June this year, and I replaced all of them with a continued low idle and misfire. I disconnected the battery 3 times this past week, and I noticed the car stalls a lot and then doesn't want to again everytime I disconnect and reconnect the battery. Driving on the road and highway it seems like nothing is wrong and goes until it becomes idle. After that, it didn't want to stall anymore but has a low idle at 500-400 RPM when in park/neutral, but drops down and shakes a little when in drive and reverse (Reverse is worse). 3rd time, it ran for a while, drove around the neighborhood and then stalled again. Second time starting, it ran and then stalled once in drive. However, right after I replaced the Vacuum Solenoid, connected the battery, and started the car, it stalled. I replaced the Fuel Pressure Regulator with one I found at the junkyard and it cleared one code, and a week later I replaced the PRC/EGR Vacuum Solenoid. P1250 - PRC/EGR Vacuum Solenoid (Device held by two bolts on top of intake manifold and on the other end of the vacuum hose connected to the Fuel Pressure Regulator) I took it to advance auto right away and discovered 3 issues. Now I'll start with this, 3 weeks ago I was driving home from work and my CEL came on. The IAC valve is reset by the PCM when the ignition is turned ON, and then OFF.Hello, I have a 2002 Mazda Protege5 (119k miles) with a low idle and a code for Cylinder Misfire #3 (P0303) NOTE: No physical adjustment of the IAC valve assembly is required after installation. START the engine and allow it to reach operating temperature. Connect the IAC valve electrical connector.Ħ. Install the IAC valve attaching screws, and tighten to 3.0 Nm (27 in lb).ĥ. Lubricate the IAC valve O-ring with clean engine oil.Ĥ. The force required to retract the pintle of a new valve will not cause damage to the valve.Ģ. ![]() If greater than 28 mm, use finger pressure to slowly retract the pintle. If installing a new IAC valve, measure the distance between the tip of the pintle and the mounting flange. IAC valve pintle shape and diameter are designed for specific application.ġ. NOTE: If installing a new IAC valve, be sure to replace with an identical part. Inspect the IAC valve O-ring for cuts, cracks or distortion. If the air passage has heavy deposits, remove the throttle body for complete cleaning. Shiny spots on the pintle or seat are normal, and do not indicate misalignment or a bent pintle shaft. It is an extremely strong solvent, and not necessary for this type of deposit. DO NOT use a cleaner that contains Methyl Ethyl Ketone. Use carburetor cleaner and a parts cleaning brush to remove carbon deposits. Clean the IAC valve O-ring sealing surface, pintle valve, seat and air passage. The force required to move the pintle may damage the threads on the worm drive.Ĥ. Remove the IAC valve attaching screws.ĬAUTION: On IAC valves that have been in service, DO NOT push or pull on the old IAC valve pintle. Disconnect the idle air control (IAC) valve electrical connector.Ģ. Let me know if you have any other questions.ġ. I attached pictures and the procedure for you for the replacement. ![]()
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