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Random rough idle, Intermittent, 2007 hummer h3, Fixing

Customer Question
Random rough idle Mechanic's...

Random rough idle

Mechanic's Assistant: Is the rough idle intermittent or consistent?

Intermittent

Mechanic's Assistant: What is the make/model/year of your car?

2007 hummer h3

Mechanic's Assistant: Are you fixing your H3 yourself? What have you tried so far?

Fixing myself. New spark plugs. New ignition coils. New MAF sensor. Even a new coolant sensor because of a code I got

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

That's all thanks

Submitted: 8 months ago.Category: Car
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Answered in 4 minutes by:
9/15/2017
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago
David Craig
David Craig, Auto Mechanic
Category: Car
Satisfied Customers: 5,417
Experience: Owner/Mechanic at 3D Automotive
Verified

Hi Im David, thanks for visiting the site. Do you still have a code?

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Customer reply replied 8 months ago
No code
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

ok

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Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

when the engine is running, remove the oil filler cap and let me know if you feel suction.

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Customer reply replied 8 months ago
Virtually none
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

ok. good. have you cleaned the throttle plate?

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Customer reply replied 8 months ago
Very little to no suction
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

have you cleaned the throttle plate?

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Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

do you have a scan tool that reads live data to see how the oxygen sensors are responding and to see what the fuel trims are?

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Customer reply replied 8 months ago
I borrowed a scanner to read the codes. Not sure if it does that. I can see if it does
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

ok

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Customer reply replied 8 months ago
All I see besides reading codes is MIL Status. I/M monitors.
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

ok then its just a basic code reader.

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Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

well other than using a can of sea foam in the intake and gas tank there's not much more I can recommend without seeing some live data

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Customer reply replied 8 months ago
I did put seafoam in gas tank. I'll try it in the intake. If that doesn't work I'll take it to the shop. Thanks
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

dont use a whole can in the intake, only about half

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Customer reply replied 8 months ago
Ok. I'll try that
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

ok, I hope that helps

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Customer reply replied 8 months ago
We'll see. Thanks
Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

you're welcome

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Auto Mechanic: David Craig, Auto Mechanic replied 8 months ago

hows it going?

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