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Jeep Wrangler YJ
YJ General Discussion
Why would I get code 24 twice?
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<blockquote data-quote="Flyer58" data-source="post: 426023" data-attributes="member: 18629"><p>I'm not sure a bad battery will cause this problem since the alternator should keep the voltage even but you can test the battery when the engine is running and see what it says.</p><p></p><p>Did you install a new MAF sensor? Testing it with the key on/engine off and getting the 5 volts off the reference wire is a good start but what does it show when a vacuum is applied? First I should ask if the vacuum line and rubber end boots are ok and there's no leaks. </p><p></p><p>You can test it the same way with a voltmeter and pull a vacuum with a brake bleeder vacuum pump - usually a free loaner tool at your friendly auto parts store. See if the voltage drop is consistent and even when pulling a vacuum.</p><p></p><p>You can try it with the engine running and see if the volts on the sensor wire drop to 1.8volts or so at idle and remain there. If they jump around then there's a problem. It's not as accurate as using a pump because it's hard to test the intermediate range as a vacuum is applied.</p><p></p><p>Give that a shot.</p></blockquote><p></p>
[QUOTE="Flyer58, post: 426023, member: 18629"] I'm not sure a bad battery will cause this problem since the alternator should keep the voltage even but you can test the battery when the engine is running and see what it says. Did you install a new MAF sensor? Testing it with the key on/engine off and getting the 5 volts off the reference wire is a good start but what does it show when a vacuum is applied? First I should ask if the vacuum line and rubber end boots are ok and there's no leaks. You can test it the same way with a voltmeter and pull a vacuum with a brake bleeder vacuum pump - usually a free loaner tool at your friendly auto parts store. See if the voltage drop is consistent and even when pulling a vacuum. You can try it with the engine running and see if the volts on the sensor wire drop to 1.8volts or so at idle and remain there. If they jump around then there's a problem. It's not as accurate as using a pump because it's hard to test the intermediate range as a vacuum is applied. Give that a shot. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Why would I get code 24 twice?
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