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2004 Ram 1500 5.7 idle issue

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Old May 7, 2021 | 07:12 PM
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Matt Chursinoff
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Default 2004 Ram 1500 5.7 idle issue

Just got the truck running it has a new PCM also program the ETC throttle and clean the MAF sensor. But the truck is surging at idle and will stall any ideas not throwing any codes except that it only has 2 o2 sensors and was running fine with them.
 
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Old May 7, 2021 | 07:59 PM
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Vacuum leak?
 
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Old May 8, 2021 | 08:10 AM
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take a look at the plugs, they will give you a lot of info.
If you diagnose a lean condition, I would not drive the truck again until that is addressed.
I agree with heyyou that you could have a vacuum leak, many times this will result in lean burn.
You could also have a lean or rich condition caused by modifying your O2 sensors.
What's your gas mileage been?
 

Last edited by jrsick; May 8, 2021 at 08:12 AM.
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Old May 9, 2021 | 05:06 AM
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Here is a video
 
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Old May 9, 2021 | 09:56 AM
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Video not showing.
 
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Old May 13, 2021 | 11:13 PM
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Could be something as simple as the crank sensor. On an '04 Hemi, it's on the right side of block, 1 bolt & a wiring connector and under $30 for the part.
Originally Posted by Matt Chursinoff
Just got the truck running it has a new PCM also program the ETC throttle and clean the MAF sensor. But the truck is surging at idle and will stall any ideas not throwing any codes except that it only has 2 o2 sensors and was running fine with them.
 
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