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P1128 and 1130 issues

Flat6speed
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Flat6speed Member

Flat6speed

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Posted

I know this topic has been covered many times. I keep getting these codes after driving about 20 to 50 miles. I have replaced several parts going to the intake for small leaks after smoke testing numerous times. New MAF sensor and new OEM AOS. What’s left? I have not checked for leaks for the fuel evap portion. And I haven’t looked into the fuel system yet. What’s my best approach from here? 

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JFP in PA Member

JFP in PA

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This is weird code set as it could go in opposite directions, depending upon which DME version is in the car.

 

In your case, it indicates an overly rich condition on both banks that the DME cannot correctly bring back into range.  Common faults include incorrect MAF signal, fuel pressure too high, and the EVAP cannister purge valve stuck in the open position.

Flat6speed Member

Flat6speed

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Something to add,  my mpg is not good (18 mpg with normal driving) and I notice a loss in horsepower. 
 

Also on occasion I notice a strong smell of gasoline when I park the car after fueling up. It usually goes away after I put a few miles on the car. This happens about 1 out of 20 times and only when I fuel up. I’m not sure if it’s related to my problem or not. 

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JFP in PA Member

JFP in PA

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13 hours ago, Flat6speed said:

What’s the easiest way to check the purge valve? 

 

Disconnect it and test its ability to hold vacuum without leaking down.  Pull around 20 inches of mercury, should not drop below 14 inches when vacuum source is removed.

Flat6speed Member

Flat6speed

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Hi JFP. Where is the purge valve located?  Is it under the intake manifold or is it up inside the front fender? It there a easy access point that I might be able to get to? 

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JFP in PA Member

JFP in PA

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21 hours ago, Flat6speed said:

Hi JFP. Where is the purge valve located?  Is it under the intake manifold or is it up inside the front fender? It there a easy access point that I might be able to get to? 

It is at the EVAP canister in the wheel well.  You need to pull the wheel well liner to get at it.

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