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Problems for specific Mazda Miata MX-5 years:

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Most reported Mazda Miata MX-5 problems

 

Verified for the Mazda Miata MX-5

A loud ticking noise (hydraulic valve lifter noise) may be heard from the top of the engine, particularly when the engine is still cold. The noise may occur more frequently on higher mileage vehicles; Hydraulic valve lash adjusters may need to be replaced to correct this issue. Following the maintenance schedule for oil changes will also help prevent a recurrence of the noise.

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Verified for the Mazda Miata MX-5

Failure of the valve cover gasket can allow engine oil to leak onto the spark plug wires and damage them. The engine will run poorly (misfire) if the spark plug wires fail.

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Verified for the Mazda Miata MX-5

Some models may have a problem where the Check Engine light illuminates indicating an improperly tightened fuel cap. Due to improperly manufactured threads on the fuel filler pipe, the filler pipe may need to be replaced.

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Verified for the Mazda Miata MX-5

The clutch slave cylinder may develop a hydraulic leak resulting in no clutch pedal pressure and the inability to shift gears.

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Verified for the Mazda Miata MX-5

The flywheel can warp causing a shudder when the vehicle is in reverse.

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Verified for the Mazda Miata MX-5

The passages for the Exhaust Gas Recirculation (EGR) system can become restricted or clogged causing the Check Engine Light to illuminate. The EGR valve will need to be inspected and the passages cleaned.

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Verified for the Mazda Miata MX-5

The engine may idle roughly or stall when it's cold because the oil pump pressure relief plunger is sticking. Failure is usually due to wear and it causes excessive oil pressure to pump up the hydraulic valve lifters keeping the valves from closing completely, which results in a loss of compression. The oil pump will need to be replaced in this case.

4 Reports
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Verified for the Mazda Miata MX-5

Misfires under load (acceleration) can be caused by spark plug wires arcing to the cylinder head in the spark plug wells. Water in the spark plug wells can also cause the same problem so careful diagnosis is needed.

4 Reports
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Reported by RepairPal and 3 others for the Mazda Miata MX-5

If the engine runs poorly, has a misfire, and/or loss of compression after camshaft installation, it may be caused by the hydraulic valve lifters over extending while the cam was out. If the lifters are extended, they will hold the valves open and cause a loss of compression. Our technicians recommend running the engine for 15 minutes, or let it sit overnight to allow the lifters to readjust to the proper position.

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