Need some advice on which direction to go

iboughtatahoe23 said:

Thanks for the reply… what’s ok exactly?

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mikez71 said:

The charging system.

Failing starter shouldn't cause the hesitation/bog you described..
Maybe if the starter gear wasnt retracting right away..and the engine is turning the starter, but you would probably hear some gear noise..

X2 what Fless said

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Fless said:

Clean the throttle body and the idle air control (IAC) and check it for functionality.

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iboughtatahoe23 said:

Hmm sometimes I hear a pop or snap like for a split sec after the vehicle first starts in really cold weather. Starter grinding perhaps?


Here’s a video of me starting it this morning. @89Suburban. It was 4°. Didn’t bog down this time but cranked slow. Which I expect in my climate. But there’s that noise at the end I mentioned that could be the starter.

I’m almost tempted to just change all three… battery alt and starter. Probably do alternator first.

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Geotrash said:

That's not the starter. It's your power steering pump cavitating because the fluid is much more viscous at that temperature and it takes a split second or more for the fluid to start moving. Having lived in northern climates from Alaska to North Dakota, I consider that sound normal. Many of my vehicles with hydraulic power steering would make that sound on first start.

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iboughtatahoe23 said:

It just seems like when i start it first time in morning it will turn over and crank just fine but AFTER it starts it’s supposed to kinda rev the RPM up and than drop down. Well sometimes it doesn’t do that, it will just bog down like it’s gonna stall out and than will barely catch up and keep the vehicle running and than rpm’s go to normal. And this is all happening within like 3 seconds. Hopefully that sheds more light

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mikeyss said:

Mine is doing the exact same thing, it happens when I put it in drive or reverse (I either park in my garage or out on the side street). This is on my 09 Tahoe with a modified L9H.

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iboughtatahoe23 said:

Cleaned throttle body recently… what idle air control.

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