H3 Oil light

[samiamakasamuel]

I have a 06 Hummer h3 when I’m driving it and stop at a light or park the rpms drop enough to cause the oil light to come on. What do I need to check.


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[mjferencak]

Check your oil level first. Your oil sensor could be bad. Worst case scenario your oil pump is going out.


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[mjferencak]

What RPMs is it idling at?


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[samiamakasamuel]

How hard is the oil pump to change


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[amrg]

You will need to Remove entire engine to do that (I did)

Before you do that try the following steps,

1. Check oil level
2. Replace oil and filter and new sensor at the same time. Do an engine flush too
3. If it comes back, try seafoam

If all didnt work, engine out.

I tryed step 1 and 2, repeated step 2 three times. After the engine was out and opened, it turned out that an Oil bypass valve was stuck open causing low oil pressure when hot. It had alot of sludge and only needed cleaning.




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[08H3]

Pull the plug off the sending unit. If it's bad, you'll see oil. First indication on mine was a frantic phone call from my wife screaming the oil light is on while on 465 in Indianapolis.

 

[samiamakasamuel]

What is a engine flush


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[mjferencak]

There are various concoction to an engine flush. It involves pouring a concoction in with the oil and running the engine for a few minutes or miles and draining the oil mixture. Some people use seafoam, some use mystery oil, some even use diesel and kerosene.


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[samiamakasamuel]

Mine don’t do it until the rpms drop.


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[08H3]

Mine don’t do it until the rpms drop.


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That's when it will show up if it's the sending unit. For example, when you stop after exiting the interstate.

 

[rascole]

Does it continue to idle low for a long duration when you stop or is it a momentary drop then climbs back up? If it is momentary then clean your MAF and check your spark plugs, they may be fouled and need to be replaced. All very easy to do.

 

[samiamakasamuel]

Yeah it will stop after a short time.


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[samiamakasamuel]

What is maf.


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[JPaul]

Mass Air Flow sensor, it's the sensor that is screwed onto the inlet pipe just next to the air box.

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[JPaul]

Get a can of electronics cleaner at Walmart or AutoZone or something, remove the screws holding the sensor in place, pull it out and blast it really well with the cleaner, then put it back.

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[samiamakasamuel]

Ok I’ll try that. Thank you.


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[Alpha X]

What is a engine flush

What is maf.

At some point you need to do a google search and figure it out for yourself.

 

[samiamakasamuel]

Why when I can ask someone with experience.


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[Traxx]

Millennials. How dare you tell me to do something for myself.

Why when I can ask someone with experience.


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[JPaul]

At some point you need to do a google search and figure it out for yourself.

Yes, because the Internet is full of 100% correct information and Google results are never 95% ads...