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Why is a Mazda b4000 1994 truck idling high 4.0 ?

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  • Mazda Master
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Check throttle blade dirty and not closing fully. Also check dirty IAC valve.

Posted on May 05, 2015

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Posted on Jan 02, 2017

  • 28 Answers

SOURCE: the idle goes high and low

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

  • 369 Answers

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Here is a link that will be very helpfull to you including what you need dont forget to rate my assistance thank you.http://www.autozone.com/autozone/repairinfo/repairguide/repairGuideContent.jsp?chapterTitle=Vacuum+Diagrams&partName=Driveability+%26+Emissions+Controls&pageId=0900c15280076be3&partId=0900c15280076b68

Posted on Feb 13, 2010

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The idle goes high and low


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

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