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Old 07-14-2021, 02:06 PM   #1
Bill Murray
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2007 ION-2 Quad Coupe
1997 SC1
Default Occasional P0172 (too rich) ... suggestions?

This is on a 2007 2.2 engine with automatic...130,000 miles
recent plugs and air filter
engine runs great
after reset may come back anywhere from 100 to 1000 miles accum

thanks for any experience
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Old 07-15-2021, 01:04 AM   #2
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2003 L-Series 3.0L Sedan
Default Re: Occasional P0172 (too rich) ... suggestions?

Can you connect a reader to log data, save it or write then down then post them? If you can, log cold engine data with ignition on engine off then log a second set of data after the engine's warmed up. Important data will be coolant temps (cold ambient temps/hot running temps), map, intake air temp (cold), maf sensor.
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Old 07-17-2021, 03:55 PM   #3
Bill Murray
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Default Re: Occasional P0172 (too rich) ... suggestions?

Thanks. Will update with data in the future...my daughter has the car now and it's 40 miles distant.
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Old 07-25-2021, 07:47 PM   #4
Bill Murray
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2007 ION-2 Quad Coupe
1997 SC1
Default Re: Occasional P0172 (too rich) ... suggestions?

This is looking like a vacuum leak with occasional P0442s so we'll look at the fuel tank cap and evap canister solenoid valve and see if the P0172 goes away too.
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Old 07-27-2021, 09:57 PM   #5
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2006 VUE 3.5L
2006 ION-2 Sedan
Default Re: Occasional P0172 (too rich) ... suggestions?

The canister purge solenoid valve (by valve cover) maybe leaking, disconnect the solenoid valve wire connector and hose that goes to the back of the vehicle, with the engine running no vacuum should be felt from the back end of the solenoid.
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Old 07-28-2021, 02:10 PM   #6
Bill Murray
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2007 ION-2 Quad Coupe
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Default Re: Occasional P0172 (too rich) ... suggestions?

Quote:
Originally Posted by bern View Post
The canister purge solenoid valve (by valve cover) maybe leaking, disconnect the solenoid valve wire connector and hose that goes to the back of the vehicle, with the engine running no vacuum should be felt from the back end of the solenoid.
Thanks, will check. I only see the car a couple times each month so it may be a couple weeks.
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