P0172 Code- Help Please
Senior Member
Joined: 09-03-2006
Posts: 498
From: chicago
So, I found a nylon replacement on Ebay?
https://www.ebay.com/itm/CHEVY-HHR-F...-/281912329600
or should I go back to steel from RockAuto, I'd have to buy the whole kit.
https://www.rockauto.com/en/moreinfo...442783&jsn=701
https://www.ebay.com/itm/CHEVY-HHR-F...-/281912329600
or should I go back to steel from RockAuto, I'd have to buy the whole kit.
https://www.rockauto.com/en/moreinfo...442783&jsn=701
Thread Starter
Senior Member
Joined: 12-10-2010
Posts: 131
From: Collinsville, IL
Just a quick update. The hard starting is still there after an evening or work shift sit. On my wife's way home last night. CEL returned with P0172.
This weekend, I will post back Fuel Pressure readings and timelines.
This weekend, I will post back Fuel Pressure readings and timelines.
Thread Starter
Senior Member
Joined: 12-10-2010
Posts: 131
From: Collinsville, IL
I should clarify my previous response to this. There is no lag between key to On and fuel pump prime activation. It's fairly immediate. I will try and check the pressure after sitting, and how long the pressure holds for.
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Joined: 03-06-2010
Posts: 6,869
From: Ohio
Thread Starter
Senior Member
Joined: 12-10-2010
Posts: 131
From: Collinsville, IL
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Joined: 01-23-2009
Posts: 26,485
From: Fredericksburg,VA
Hard starting + p0172 makes me think hole in vapor recovery tube. Or the EVAP purge valve is stuck open. Hard starting might be the check valve has failed, or an air leak in the fuel tank.
It means that the ECM is correcting the A/F to make it rich. It does not mean it is running rich. Sort of the same thing, but different.
That means that there is unmetered air getting into the chamber. Most common is via the EVAP purge system. Unmeterd air would be getting in between the MAF and the #1 O2 sensor.
Ignore any transmission symptoms until the code is fixed.
It means that the ECM is correcting the A/F to make it rich. It does not mean it is running rich. Sort of the same thing, but different.
That means that there is unmetered air getting into the chamber. Most common is via the EVAP purge system. Unmeterd air would be getting in between the MAF and the #1 O2 sensor.
Ignore any transmission symptoms until the code is fixed.
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From: Welland,Ont Canada
Thread Starter
Senior Member
Joined: 12-10-2010
Posts: 131
From: Collinsville, IL
Hard starting + p0172 makes me think hole in vapor recovery tube. Or the EVAP purge valve is stuck open. Hard starting might be the check valve has failed, or an air leak in the fuel tank.
It means that the ECM is correcting the A/F to make it rich. It does not mean it is running rich. Sort of the same thing, but different.
That means that there is unmetered air getting into the chamber. Most common is via the EVAP purge system. Unmeterd air would be getting in between the MAF and the #1 O2 sensor.
Ignore any transmission symptoms until the code is fixed.
It means that the ECM is correcting the A/F to make it rich. It does not mean it is running rich. Sort of the same thing, but different.
That means that there is unmetered air getting into the chamber. Most common is via the EVAP purge system. Unmeterd air would be getting in between the MAF and the #1 O2 sensor.
Ignore any transmission symptoms until the code is fixed.
Thread Starter
Senior Member
Joined: 12-10-2010
Posts: 131
From: Collinsville, IL
