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#1
03-04-2009, 07:10 PM
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'02 Grand Prix, driving me insane
Alright, went to drive the car the other day. Didnt have enough power to climb a hill, then check engine light came on. Took it back home and hooked a computer to it. It set a code, which was the EGR. I wasnt sure if it was a EGR or a cloged converter. So I replaced the EGR valve, now when you revv the engine while in park it makes a very loud roaring sound. Also still has no power?? It also set another code PO300 which is a generic miss fire. It sounds like the loud roar is coming from beneath the car, right where the converter is. Ive narrowed it down to these possible things, a bad mass air flow censor or a bad converter.
So my question is, could it be a cloged converter?? The car has the 3100 series engine, with around 127,xxx miles. It was my daily driver. Last edited by Jays 83z; 03-05-2009 at 01:06 PM. 
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#2
03-04-2009, 08:25 PM
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Re: '02 Grand Prix, driving me insane
Couple things...if the EGR is stuck wide open this will hurt engine power.
Sounds that you might have a leak somewhere (??)
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1988 Chevy R-30 1 ton DRW pickup (217k) 1991 Chevy S-10 4WD pickup (192k) 2000 Grand Prix GTP (218k) 2002 GMC Yukon (185k) 2009 G8 - GT (46k)
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#3
03-04-2009, 08:36 PM
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Re: '02 Grand Prix, driving me insane
Welcome to AF.
It would help to post your mileage and the specific EGR code (DTC) since there are several. Converter is possible since 2001-2002 models with the 3800 VIN "K" and VIN "1" engines may have been flaky from the factory. We have an advisory notice from GM posted at our Tips & Maintenance subforum. Click here
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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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