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I have a 2004 Mazda Miata Mazdaspeed. I just got my clutch replaced and got a Code P0850 which is for the Neutral Safety Switch. I do notice an issue with idle RPM which is relatively higher when I start the car initially. However, when I come to stop while driving, the idle drops to almost 500 RPM and then picks back again.

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  • Expert
  • 61 Answers

Adjust the revs on the throtle control unit should be a screw there

Posted on Oct 19, 2013

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6ya6ya
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Posted on Jan 02, 2017

3dmaster
  • 183 Answers

SOURCE: Idle problem

Yes you can,

do this with your RPM setting,

you ahve to just set you engine race settings,

try & having funn with your car,

THNX

Posted on May 18, 2008

  • 1 Answer

SOURCE: 2004 Saturn Ion high RPM while Idling

check for a vacuum leak

Posted on Oct 26, 2008

emissionwiz
  • 75814 Answers

SOURCE: my car threatens to die during idling...the rpm

Here are the most common causes of surges, stalls at stops, low erratic idle speed, rough idle and engine hesitation, it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) 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 Mar 29, 2009

  • 1 Answer

SOURCE: 2003 Mazda protege had rough idle and wants to stall when I stop.

The idle on my 2003 Mazda Protege started acting strange one day - it kinda surged forward a little bit. Then the RPM would drop and kept wanting to stall out. It stalled out at a stop sign. The check engine light came on. I drove it immediately to my Goodyear mechanic. It ended up being the Idle Air Control Valve. They had to order the part from Mazda which took 3 days to get there. The whole thing cost $700. Runs great now (again).

Posted on Apr 21, 2009

emissionwiz
  • 75814 Answers

SOURCE: Neutral Safety Switch Location

on the transmission where the shift cable attaches.

Posted on Jun 15, 2009

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