Help us help you. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc.) Along with any prevalent Diagnostic Trouble Codes, aka DTCs, other forum members will be able to help you get to a solution more quickly and easily!

Understand map

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4 years 11 months ago #29614 by A93320336@gmail.com
Understand map was created by A93320336@gmail.com
Good day

I have hyundai elntra 2009 1.6

Dear i need to understand map

I have map no mas
And fuel term is lean 14 at ideal
And ok when accelatore

It same as mas mean leak
Or map is not effect by intake leak

My RPM is 500

And it seem it misfire at ideal

My throtter is .3v at ideal

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4 years 11 months ago #29678 by chief eaglebear
Replied by chief eaglebear on topic Understand map
we need a little more info it sounds like you have a vacuum leak

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4 years 11 months ago #29693 by Andy.MacFadyen
Replied by Andy.MacFadyen on topic Understand map
Just checking the map reading at key on engine off will usually tell if you have a bad map sensor. At key on engine off it should read atmospheric pressure at your location.

As already posted by others an engine running lean at idle but less lean higher up the rpm range is usually a vacuum leak. MAP engines are less sensitive to vacuum leaks than MAF engines but are still affected.
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The following user(s) said Thank You: A93320336@gmail.com

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