Question about 1993 Mazda MX-3

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Idiling I have a 1993 MX3 1.8 Manual Transmission. Start fine.But the rpm is very low that the engine almost die.But if I put it in gear the rpm goes higher

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  • ammosoldier Nov 16, 2008

    I have the same problem but the engine doesn't die. Instead, when the engine is in neutral it stays at about 1000rpms. When the clutch is depressed and placed in a gear it revs up to about 1500 and bounces back down to 1000 the enitre time. I have used several cans of throttle body cleaner to clean the throttle body, complete tune up, but still have this same problem.

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here is what you need to do, a cleaning of the intake throttle blade and the idle speed control air-bypass valve, they get full of gunk over the miles and cause idle issues (stalls) like yours,
Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake

Posted on Oct 29, 2008

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