Shutting off after start, while idling, and stopped, code p0300

2005 VOLVO V50
200,000 MILES • 2WD • AUTOMATIC
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WSOWERS
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Car is shutting off when idling or stopped. Or when backing up or going forward car wants to shut off. I have to accelerate the gas a bunch to keep it from shutting off. Car does okay for the most part if I manual shift it the whole time I drive it. Stalls out less with manual shift.
All fluids are good. Ran codes got a po300 on a code tester. Where should I start?
Mar 8, 2018 at 11:31 PM
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STRAILER
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Hello,

It sounds like you have an air intake tube that has fallen of or you have a large vacuum leak. Here are two guide to help us get started:

https://www.2carpros.com/articles/replace-an-air-intake-boot

and

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Please let us know what you find.

Cheers, Ken

Mar 12, 2018 at 1:20 PM
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WSOWERS
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Hello Ken,
Thank you so much for your help! The oil breather tube was cracked. Replaced that, also replaced all five spark plugs. Found three bad coils and replaced them also. We are good to go! Thank you again!
Mar 17, 2018 at 10:20 PM
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STRAILER
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Nice work, we are here to help, please use 2CarPros anytime.

Cheers, Ken
Mar 19, 2018 at 10:45 AM