- posted
15 years ago
EGR Trouble
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- posted
15 years ago
"MAMM (maybe a mechanical moron)" wrote in message news:XiBml.10639$ snipped-for-privacy@newsfe16.iad...
Has this vehicle been modified from stock? Like a K&N filter or other instake mod? A MAF sensor issue or something stuck to it can throw this code.
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- posted
15 years ago
Nope. This truck is stock. No exhaust mods, no programmer, no chip, stock air filter (although at the price a K&N actually looks economical). It does have over 90K miles on it.
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- posted
15 years ago
Might try changing fuel source. The fact that it is fouling out so soon tend to suggest incomplete combustion due to injection timing or fuel quality. Also is engine "loaded" a lot of mostly loafing.
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- posted
15 years ago
Its says P0402 Generic EGR Excessive Flow. I decided to keep an eye on it and wait for it top pop up again so I would know exactly what I was doing when it came up again. Of course after popping up several times only a couple days apart, it then decided not to pop up again for a couple weeks. In the intervening time I have done around town driving, freeway driving, and moderate weight towing to including a 3000lb boat. It popped back up again this morning finally with the same code cruising down the freeway with the cruise control set at 65mph and the truck loafing along in high gear.
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- posted
15 years ago
Excessive egr flow is usually caused by a partially plugged exhaust system. On gas engine cars it's usually due to bad catalytic converter. I don't fool with diesels but I would guess there could be something that could get stopped up in the exhaust system.
nobody #1
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- posted
15 years ago
Well, I took it back to the dealer on Monday who said they went through it from stem to stern, and said it was perfect. Today just cruising along at
55MPH it popped up again. I driove straight to the dealer,and their next step is to replace the EGR again.- Vote on answer
- posted
15 years ago
Trying to fix something like that by throwing parts at it usually doesn't get very good results. You need to tell them it's *diagnose them repair* it seems they don't know that. The problem with a lot of dealerships is they have an unlimited supply of parts and a limited supply of really good techs.
nobody #1
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- posted
15 years ago
Yeah, buddy! I get frustrated by that too. In bigger markets you can go to different dealers until you find a shop that will take care of you, but GM severely limited that by prohibiting cross line warranty service a few years ago, and in smaller markets you often only have one choice now. Personally in my market I like the commercial sales staff at the Chevy Dealer, but like the service shop at the GMC dealer.
Waddayagonnado!
Bob La Londe