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Discussion Starter #1
I got check engine light (09' Escalade ESV) the code only one P0174.
But I might be drew up my self, I fueled with 87 instead 91/93, Why? I don't know, may be experimenting.

thanks for help
 

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Discussion Starter #3
ok anyone has this problem ? Solve how? MAF cleaning, vacuum leak, fuel pump or fuel filter
 

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Discussion Starter #5
Yes it's I cleaned MAF and reset light. I will drive 20-30 miles to see effect today.
 

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I got check engine light (09' Escalade ESV) the code only one P0174.
But I might be drew up my self, I fueled with 87 instead 91/93, Why? I don't know, may be experimenting.

thanks for help
Check the PCV hose. It's under the engine cover and runs on the top portion of the engine from the rear.

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42 Posts
I got check engine light (09' Escalade ESV) the code only one P0174.
But I might be drew up my self, I fueled with 87 instead 91/93, Why? I don't know, may be experimenting.

thanks for help
The PCV hose is the small hose just under the hose seen in the picture
 

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Discussion Starter #8
Ok guys the weather is perfect in VA.
So I went under the hood and find this vacuum tube disconnected from the intake manifold.This tube located on same side as it filter.
 
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