If your Mazda Miata won't idle after sitting for two years, it could be due to several factors. Fuel may have degraded, causing clogs in the fuel system or issues with the fuel injectors. Additionally, the battery could be dead, and the spark plugs or other ignition components might need replacing. Finally, rubber components like hoses and gaskets may have deteriorated, leading to vacuum leaks or other mechanical issues.
To adjust the engine idle on a 1990 Mazda Miata with a 1.6 engine, locate the idle adjustment screw on the throttle body. Start the engine and allow it to reach normal operating temperature. Then, use a screwdriver to turn the idle adjustment screw clockwise to increase the idle speed or counterclockwise to decrease it, aiming for an idle speed of around 850 RPM. Always double-check the idle speed with a tachometer after making adjustments.
Yes, at idle it brings the normal stock of 900 up to 1000 rpms
Check for a vacuum leak.
A 1991 Mazda Miata may idle low due to several factors, including a malfunctioning idle air control valve (IAC), vacuum leaks, or issues with the throttle body. Additionally, problems with the engine's fuel system, such as a clogged fuel filter or failing fuel pump, can affect idle performance. Spark plugs or ignition system issues might also contribute to irregular idling. Regular maintenance can help prevent these issues.
To change the Idle Air Control (IAC) valve on a 1992 Mazda Miata, first disconnect the negative battery cable to ensure safety. Locate the IAC valve on the throttle body, then remove the electrical connector and the two bolts securing the valve in place. Take out the old valve, clean the mounting surface, and install the new valve by reversing the removal process, ensuring a secure fit. Finally, reconnect the battery and start the engine to check for proper operation.
The idle adjustment screw is on the side of the throttle body. Take a Phillips head screwdriver, and adjust it. If you're not familiar with the throttle body, if you're looking directly at the engine from the front, it's the first piece on the left that the plastic crossover tube connects to. You'll see a spring-loaded wheel on the side, and the idle adjustment should be next to it.
The idle should be at 8 to 900 rpms, if lower then theres a idle screw on the side of the throttle body in front of the injector, turn it to where the idle needs to be.
To adjust the idle on Mazda 929 from 1992-1995.......on the top side off throttle body there is a idle air screw,turn screw cloclwise to reduce RPM. Question...is idle always high when hot or cold?
Try adjusting the idle screw first to achieve 1000rpm, that should cure the rough idle, if not refer to this website http://autorepair.about.com/library/a/1h/bl964h.htm A very common issue with mazda's is the Idle Air Control Valve. Refer to this website to clean the part which typically solves the problem. BE VERY CAREFUL when removing the part. Everything inside is spring loaded and the part is very expensive to replace. http://www.geocities.com/adamk01452/IAC_Clean.html
Thassophobia - fear of sitting idle
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I have a Mazda 2001 Tribute and I just replaced the Idle Air Control Valve (IAC). I searched for Idle Speed Control actuator and there does not appear to be one. The IAC is the silver module right on top of the manifold.