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Inconsistent Idle


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My truck seems to randomly pick what speed it wants to idle at. Sometimes as low as 300 rpm, once as high as 2000 rpm. This can change while I am driving it, and usually jumps up to around 1300 rpm when I throw it into park after driving it for a while. Also my part time light stays on most of the time even though I am in 2H, but turns off when I accelerate quickly. 

 

Any ideas on what is going on?

 

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I have the same issue, but its unclear to me what the answers may be listed above? renix system issues?

On 1/24/2020 at 5:59 AM, BizarroStormy said:

Looks like I have some projects for the weekend. Thanks, I will report my results. 

 

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  • 1 month later...

So I did most of the tips and it didn't change my idle issue, that C101 connector was disgusting though. I replaced my air control valve, throttle position sensor, MAP sensor, and oxygen sensor (all at once) and it solved the issue.

My truck Idles around 800-900 rpms now and doesn't go crazy while in park.

Hopefully this will help my gas millage, I was getting around 13 mpg before swapping the parts.

Thanks for all the advice :smile:.

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