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Old 12-30-2015, 02:50 PM   #1
Cronusheart
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Default Hanging RPM, p1174 code

Hello,

About a month ago my car threw a p1174 code. Since then I've noticed that the rpm hangs at 1400 when coasting in neutral, and will drop to idle when the vehicle stops. The problem appears to be intermittent, and I can't figure out under what conditions it occurs. Any ideas on how to correct this issue?

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2006 ion3, 2.4l
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Old 12-31-2015, 09:36 AM   #2
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Default Re: Hanging RPM, p1174 code

http://m.greatautohelp.com/questions...aturn-ion.html

Ignore the problem any longer and tipu will blow up your engine
...
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trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.
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Old 01-03-2016, 07:14 PM   #3
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Default Re: Hanging RPM, p1174 code

Could you explain what is causing the issue exactly? The cel went off and has not come back on.

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Old 01-03-2016, 11:34 PM   #4
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Default Re: Hanging RPM, p1174 code

The link explains it just fine (that's why I put it in my post), but basically, fuel trim balance is off, some cylinders are getting more fuel than others. There is no void reason for this besides bad/plugged injectors. Injectors in l61/le5/lsj engines are known to plug/go bad. This is why there is a tsb stating to use top tier gas in these engines. Replace the old design injectors with the new ones and get the ecu flashed.
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trifecta dealer for the U.P. and WI. There is no two door ion. Proudly driving one of the last saturns produced before gm killed the brand.
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Old 01-04-2016, 12:17 PM   #5
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Default Re: Hanging RPM, p1174 code

Thanks man. If I use top gas and fuel injector cleaner, can I put off swapping out the injectors for a bit?
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Old 01-05-2016, 02:10 AM   #6
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Default Re: Hanging RPM, p1174 code

I wouldn't. The damage is done, and likely permanent.
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