Low Idle or shutoff after you put in gas

[BonnieLassie76]

So my car will not start or have low/rough idle especially after you put in gas and sometimes when you come to a stop and then drops to the point to almost shutoff. OBDii said it was the O2 sensors. Replaced both sensors with AC Delco parts, erased codes. Check engine light came back on when she started to stumble again. Check scanner and says too lean and both codes said permanent. She also feels like she's struggling when you try get up and go. Help. Have 68k on car and idk what's wrong but it's probably not covered under powertrain warranty. Anybody have any issues like mine? Any help is much appreciated.


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[Italianjoe1]

It's all the time, but worse after you fill up with gas?

I'd suggest looking at the fuel trims, you may have an air leak somewhere or a stuck purge valve. Proper diag before you just throw parts at it.

 

[BonnieLassie76]

It's all the time, but worse after you fill up with gas?

I'd suggest looking at the fuel trims, you may have an air leak somewhere or a stuck purge valve. Proper diag before you just throw parts at it.

Its primarily after you put gas in. But the stumbling when you come to a stop is becoming more frequent. I will check those areas you suggested and follow up with my findings.

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[Llia]

Not sure if it's safe to clamp the purge hose temporarily or not.

Might as well inspect the PCV valve since it could cause a vacuum leak that would affect idle. You should be able to spot it by removing the hose that connects from the turbo to the top center of the intake manifold. There is a small metal horseshoe like clip securing it. You'll need a strong flashlight and then look down inside the hole for the orange PCV valve.


I don't know the fuel filter service interval or the typical injector life expectancy off hand so no help there.
Other than that. Have you done any mods to the car?

 

[BonnieLassie76]

Not sure if it's safe to clamp the purge hose temporarily or not.

Might as well inspect the PCV valve since it could cause a vacuum leak that would affect idle. You should be able to spot it by removing the hose that connects from the turbo to the top center of the intake manifold. There is a small metal horseshoe like clip securing it. You'll need a strong flashlight and then look down inside the hole for the orange PCV valve.


I don't know the fuel filter service interval or the typical injector life expectancy off hand so no help there.
Other than that. Have you done any mods to the car?

No mods. Just as it came from factory to my knowledge.

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[Italianjoe1]

Check that the disc isn't blown on the valve cover breather. Pull up the cover, and on the front/right corner you will see a little circle with a small opening facing you on the top of the cover. If there's air blowing through it or suction, the valve inside is failed. They usually make noise but not always and will cause a large vacuum leak and rough running. I forgot all about that.

 

[pljenkins]

Exactly what codes are you getting?

I had a high vapor purge flow issue that caused it to run funky after fill ups, though it would improve rather rapidly and be okay until the next fill.

Though now I have other problems and I'm getting ready to replace my valve cover for the 3rd time in this car's 108K mile life... Sigh....

 

[BonnieLassie76]

Here are the codes

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[BonnieLassie76]

The codes

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[minitrucking02]

change the purge valve on the top of the motor.
if it sounds cam'd after you put gas in the valve is stuck open and it's loping due to fuel vapors getting into the manifold.

ACDelco 55573017 dealer list is $36.11, not yet released to the aftermarket. Bosch makes the valve, possibly try to find the Bosch cross reference number it might be cheaper.

 

[BonnieLassie76]

****UPDATE*******
replaced purge canister under car in tank area and voila fixed. Thank you to everyone for their input.

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[Llia]

****UPDATE*******
replaced purge canister under car in tank area and voila fixed. Thank you to everyone for their input.

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so it's not the one on the manifold but near the fuel tank?
How much did it cost?

I wonder if these parts failing are leaning the engine which then causes the heat issues and high EGT that kill the turbo. Also Causes misfires from the ecu adding fuel to enrich the fuel mixture.

 

[BonnieLassie76]

so it's not the one on the manifold but near the fuel tank?
How much did it cost?

I wonder if these parts failing are leaning the engine which then causes the heat issues and high EGT that kill the turbo. Also Causes misfires from the ecu adding fuel to enrich the fuel mixture.

I bought both parts off Amazon for $44. Changed the top one first still had problem. Removed new part and put old back on. Then changed the one by the tank and voila fixed. Went ahead and put the other new part back on since I couldn't return it because I had already installed it. Both parts were AC Delco.

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[Llia]

I bought both parts off Amazon for $44. Changed the top one first still had problem. Removed new part and put old back on. Then changed the one by the tank and voila fixed. Went ahead and put the other new part back on since I couldn't return it because I had already installed it. Both parts were AC Delco.

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What was the part number(s) if you remember?

 

[BonnieLassie76]

What was the part number(s) if you remember?

Here is a copy of my transaction listing both parts. Hope this helps.

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[Hapaguy808]

How difficult was it to install the canister vent valve. The area where it’s at seems pretty tight. I’m having the same problem with my Sonic after putting in gas.

 

[mja]

so it's not the one on the manifold but near the fuel tank?
How much did it cost?

I wonder if these parts failing are leaning the engine which then causes the heat issues and high EGT that kill the turbo. Also Causes misfires from the ecu adding fuel to enrich the fuel mixture.

I don't think a broken EVAP purge would burn up a turbo. I suppose it's possible but not likely. Maybe a catalytic converter/O2 sensor.

Really old and clogged carbon canisters can also cause similar issues mentioned in this thread.