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Old 09-20-2020, 11:29 PM   #1
rccomedian
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Default Airflow issue? Please help.

So I have a 2008 Astra which has had a code on it forever P1101. My dad who owned it says he replaced one of the sensors (least expensive one) so my guess is the MAP. I was feeling lazy so I took it to a shop and they said they found a leaking purge valve. Put in a new purge valve but still getting the code. Its also sometimes met with a P0068 code. And today after my wife drove it it also had a cylinder 3 Misfire code. We used to have misfires all the time until I changed the spark plugs. But now it's rare. Other symptoms include occasional sputtering (usually without a code) and now when the code is on it usually runs fine (before it was having a hard time accelerating) previous forum research suggests maybe I should clean the throttle body. However it was not clearly in bad shape when I looked at it. Airfilter also looks good. I'll probably clean the throttle body tomorrow just for the giggles so that leads me to a few questions.

Do I actually need to remove the full TB or can I hold it open without damaging it?

If not the throttle body any ideas on the issue?

Should I just run it into a wall?
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Old 09-22-2020, 08:37 AM   #2
maschinenbauer
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2008 Astra XE
Default Re: Airflow issue? Please help.

You don't need to remove the TB, you can just remove the air pipe and push the butterfly valve open. You won't damage it. Spray some TB cleaner on a rag and wipe both sides of the valve and around the edges. The front may look clean, but the back side will have black EGR gunk. I do this every air filter change.

Is the MAP sensor OEM? I've had bad luck with "cheap generic Amazon brand" MAP sensors on other cars. I would recommend a used OEM one from a junkyard/eBay just to see if it clears the code.
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Old 09-22-2020, 11:24 AM   #3
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Default Re: Airflow issue? Please help.

Good tips!
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