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2006 gmc envoy_denali
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52 Posts
Discussion Starter #1
Hello,
Posting this for my mother in law. My father in law and I have been trying to look into this weird issue that started on her 07 TB SS.
It’s basically a stock with K&N intake 07 SS with just over 70k. Lately when you turn it on from cold cold start like over night it is fine. However, when you attempt to turn it on from it being off for 5min to couple of hours randomly it will do a long start almost as if you let go of key and tried to restart it again but all in one swoop. Can’t pinpoint it to lack of spark or fuel before it actually catches.

Here is a video she took for me to hear and research.

Checked codes - none
Checked misc hoses - no issue
Cleaned the MAF since the K&N was recently cleaned.
Unplugged battery for 30m to recalibrate

Any help would be appreciated.
 

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2002 chevy trailblazer_lt
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270 Posts
For lack of anything else to suggest I will say check the fuel pump pressure during this warm start situation.
 
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