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Old 03-13-2019, 07:06 PM   #1
merphie
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Default 02 Saturn Vue 6cyc, P300

My saturn just stopped running this after noon. It set codes P300, P303, P306. It will start for a few minutes but runs rough before it stalls. The fuel pump buzzes when you turn the key

Any idea where to start?
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Old 03-13-2019, 08:14 PM   #2
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Default Re: 02 Saturn Vue 6cyc, P300

How many miles on this '02? Has the Timing Belt been replaced?
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Old 03-13-2019, 08:42 PM   #3
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Default Re: 02 Saturn Vue 6cyc, P300

Those are misfire codes. I would start with spark plugs and maybe coils.
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Old 03-13-2019, 08:49 PM   #4
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Default Re: 02 Saturn Vue 6cyc, P300

Quote:
Originally Posted by merphie View Post
My saturn just stopped running this after noon. It set codes P300, P303, P306. It will start for a few minutes but runs rough before it stalls. The fuel pump buzzes when you turn the key

Any idea where to start?
Quote:
Originally Posted by Chazberry View Post
How many miles on this '02? Has the Timing Belt been replaced?
Yes, the timing belt was replaced about 20K ago. It looks like the belt slipped because it was chewed up. It looks like a bearing failure in the idler.
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Old 03-14-2019, 09:05 AM   #5
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Default Re: 02 Saturn Vue 6cyc, P300

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Originally Posted by merphie View Post
Yes, the timing belt was replaced about 20K ago.
If it's been running fine for 20k mi., I guess the TB didn't slip enough to bend any valves. And I guess the Plugs have been replaced? My L81 started misfiring before it died completely. A used ECM fixed it for a little while. But it's no fun trying to prove the ECM is the problem.
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