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#16
10-09-2008, 05:03 PM
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Re: Help With Error Codes
Was this a new GM/Delco EGR or aftermarket?
You've got me scratching my head now. About all I can suggest even though technically a EGR relearn is not required try the following which is supposed to force the PCM to relearn the pintle closed position. With engine off, disconnect the electrical connector to EGR valve, take ignition key to on, reset DTC error codes/SES light with scanner and immediately take the key to off position. Then re-connect electrical connector for EGR and take the key back to on not start for at least 5 seconds. Then see what you get.
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines 
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#18
10-13-2008, 12:35 PM
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Re: Help With Error Codes
Where would the EGR vacuum solenoid be located? Also whats the best way to clean the intake manifold??
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Last edited by RedGuy; 10-13-2008 at 02:32 PM.
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#19
10-14-2008, 05:21 AM
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Re: Help With Error Codes
Everything is part of the EGR valve which is electrical. There is no vacuum solenoid.
Are you referring to cleaning out the supercharger since it is the upper intake manifold or lower intake manifold?
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'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#21
10-17-2008, 09:41 AM
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Re: Help With Error Codes
As BNaylor stated, the EGR on your car is all electronic.
Can you post the actual PXXXX code that came up? Maybe you were given a wrong definition. In my generic code list, I show this: P1402 EGR Vacuum Regulator Solenoid Valve Short To Positive (Volkswagen) which obviously being Volkswagen doesn't apply to your vehicle But this would apply to your car: P0402 Exhaust Gas Recirculation Flow Excessive Detected, This code would be tripped if a vacuum hose was disconnected with the engine running due to the parameters the PCM uses to determine EGR flow.
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 Still waiting for the "good old days" I'll get to bore my future grandchildren with!
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#23
09-13-2009, 08:04 AM
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Re: Help With Error Codes
It is the electrical part of the EGR valve assembly and not a separate component. What issue are you having? Any diagnostic trouble code?
__________________
'08 Pontiac Grand Prix GXP (Dark Slate Metallic) - LS4 5.3L V8 '02 Oldsmobile Alero GL2 - LA1 3400 V6 '99 Buick Regal LS - L36 Series II 3800 V6 '03 Honda CR250R MX - 2 Stroke 250cc '97 Pontiac Grand Prix GTP - L67 Series II 3800 V6 Supercharged (Sold) Timeslip 08/12/06 AF Community Guidelines
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#24
09-13-2009, 01:15 PM
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Re: Help With Error Codes
man the same problem since I bought the car with egr code p104...I replaced the egr,checked the wires for any shorts, and cleaned all the plugs. I'm completely stumped on the issue. Also I'm only getting about 16 mpg which I believe should be better.
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