Question about 1999 Mazda Protege

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The idle goes high and low

I have a 1999 mazda protege 1.6L 4 cylinder 5 speed well when i put it in nuetral the idle goes high and low and when i push in the clutch the idle goes down

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  • rjhtuner May 13, 2009

    1. NO THE

  • rjhtuner May 13, 2009


  • rjhtuner May 14, 2009


  • dustang25 May 11, 2010

    is the check eng. light on? i ran into one a few months ago similar prob. but it will set check eng light if this is the case.

  • robey420508 May 11, 2010

    what happens when it is in gear does it accelerate correctly? I'm thinking weak fuel pump


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There was a tsb on those for the neutral switch. it can cause all sorts of funky problems. usually you get a check eng. light with egr code and imrc code. can cause erattic idle, stalling, and alot of confusion. it is located behind a bracket under the transmission. you can check continuity wile putting the shifter in and out of gear. also there in a tsb on the clutch pedal switch that can do the same thing. you can look under the dash and make sure that the rubber stopper is completely engaging an diengaging the switch, and you can check continuity there as well. hope this helps you... dustang

Posted on May 13, 2009

  • dustang25 May 14, 2009

    sorry tsb stand for technical service bulletin. it is basically a common problem that isn't severe enough to be a recall.


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Posted by Asker under 1997 Mazda Protege for their 2002 Mazda Protege 5.
Both are included Below

Click on the following free direct Link. It has the Belt Diagrams for the 1997 Mazda Protege with either the 1.5L DOHC In-Line 4-Cylinder or 1.8L DOHC In-Line 4-Cylinder Engines; along with various engine options (AC/No AC, etc.). Included are Instrucional Diagrams for loosening (for removal) and tightening (for replacement) using the Adjustment and Locking Bolts/Nuts.

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Let me know if this helped, or if you have additional information questions. Feel Free to contact me at!

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