iceman1575 Posted May 14, 2011 Report Share Posted May 14, 2011 2001 Grand Prix GT 3.8L N/A motor. Would EGR codes lead to something with the EGR valve itself causing horrible gas mileage? I only get like maybe 15-17mpg... Quote POTATO! Link to comment Share on other sites More sharing options...
Parentnoia Posted May 14, 2011 Report Share Posted May 14, 2011 I'm having the same problem with my 98 Escort. Quote 1999 GMC Suburban SLTNo system planned just yet. Look at "hate" spelled backwards. It spells "e-tah." For example, if you hate me you can e-tah dick. Link to comment Share on other sites More sharing options...
Tarball Posted May 14, 2011 Report Share Posted May 14, 2011 If you have EGR valvle codes have it changed quick. IF you don't this will only lead to more costly repairs in the near future. Once your engine sets a code it will no longer meter the fuel properly and goe sinto a default mode. When you continue to drive the next things that happen will be possible bad 02 sensor(s), clogged catalytic converter (or worse it could breakup and end up in your muffler), and or burnt plugs. If you are handy go to your local Autozone and have them check the code to verify. Replace the valve or what ever other component is setting the code and hope other damage hasn't already been done. The cost of the repair will be made up quickly just in gas milage. Also, contrary to popular belief, always run premium gas, it really does make a difference. Quote CURRENT SYSTEM: Alternator: Stock alt on mids/highs Isolated DC Power 270 SP - Charging @ 16.8v Batteries: (2) XS D1400s Power Cable: Double Runs of 1/0 KNU Kolossus Fleks Headunit: 80-PRS Sub Amp: DC 5.0k Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones Subwoofer Enclosure: 9.1cubes @ 32hz - brutal. Mids & Highs Amp: CT125.4 Active Components: Mids RE XXX 6.5c Highs - 3 RE XXX tweeters per side(A pillar) Noise Control: Damplifier Pro all over the cab. Build Log If you do business with me please leave feedback here: FEEDBACK THREAD Highest Legal Score: 151.0 db Highest Musical 30 Second Average: 151.6 db Link to comment Share on other sites More sharing options...
JaM Customs aka mprete Posted May 15, 2011 Report Share Posted May 15, 2011 what is the code? and yes it can Quote 2001 dodge ram 2500 quad cab 5.9L V8 my build logs... dodge build http://www.stevemeadedesigns.com/board/topic/94914-mpretes-2001-dodge-ram-2500-quad-cab-build-log/ trik build http://www.stevemeadedesigns.com/board/topic/94447-trik-build/page__p__1298547__hl__trik__fromsearch__1entry1298547 box building thread- very cool designs (PICS!!!) http://www.stevemeadedesigns.com/board/topic/95713-2d-or-3d-box-pics/page__gopid__1318152entry1318152 i am a mechanic, pm me if you have questions or anything. Link to comment Share on other sites More sharing options...
Azagtoth502 Posted May 15, 2011 Report Share Posted May 15, 2011 You mean highway miles Ice? The city rating is around 17mpg. Quote pa-pa-platypus sorry not everybody has a companies nuts so far down their throat they catch every drop ball sweat when it falls Link to comment Share on other sites More sharing options...
iceman1575 Posted May 15, 2011 Author Report Share Posted May 15, 2011 You mean highway miles Ice? The city rating is around 17mpg. Highway is closer to 20. City depends on the tank of gas, anywhere from 11-17mpg... Quote POTATO! Link to comment Share on other sites More sharing options...
billy101 Posted May 15, 2011 Report Share Posted May 15, 2011 I've got a 2001 Impala 3.8L with some mods done to it, top swapped Gen V supercharger, cammed, and more. Around town my average MPG that I calculate by the trip, dividing that by the amount of gas I get when I fill up is around 16.5 - 17 mpg. That of course is because I'm a 16 year old high school student who likes to beat on a car that's rather fast haha...anyways. These cars get horrible gas mileage around town in stop and go traffic. On highway they'll easily get 31mpg though; go figure. your city mpg sounds about right compared to what I get... Quote First System 2002 Impala LS 3.8L V6, 128,365k miles. Alternator: DC Power 190Amp H/O Alternator Headunit: Kenwood KDC-BT945U. Speakers: MBQuart 6.5" Comps, 6x9 3-way. Amplifer: Eclipse 3322 on front 6.5 components, and a Infinity Kappa One @ 2ohm- 800w Subwoofers: 2 REAudio SRX12D2 wired to 2 ohm. Box: 3.1cuft box tuned to 33hz. sealed off to cabin Big 3- done with all Knukonceptz KCA 0 gauge. Don't drop below 14.1v at full tilt. Link to comment Share on other sites More sharing options...
iceman1575 Posted May 17, 2011 Author Report Share Posted May 17, 2011 (edited) I've got a 2001 Impala 3.8L with some mods done to it, top swapped Gen V supercharger, cammed, and more. Around town my average MPG that I calculate by the trip, dividing that by the amount of gas I get when I fill up is around 16.5 - 17 mpg. That of course is because I'm a 16 year old high school student who likes to beat on a car that's rather fast haha...anyways. These cars get horrible gas mileage around town in stop and go traffic. On highway they'll easily get 31mpg though; go figure. your city mpg sounds about right compared to what I get... I don't gun on mine though unless I'm enroute to the FD, and even then I don't go more than 65-70mph in 55mph zones. Well, either way I went ahead and got another EGR valve, so we're gonna see how that goes. Edited May 17, 2011 by iceman1575 Quote POTATO! Link to comment Share on other sites More sharing options...
white4d96 Posted May 19, 2011 Report Share Posted May 19, 2011 Also check your PCV valve. I don't know about the L36's, but I know on the L67's they're crammed down in a corner where people like to forget about them until they fail. It's like a three dollar part. While you're at it a tune-up can help as well. Plugs wires filters etc etc. I noticed a bit of a gain with a CAI and mild exhaust as well, but if you're just looking to get back to stock mileage you won't have to go that far. 3.8's tend to sound cruddy with exhausts anyhow Quote Too many projects, too little time... Link to comment Share on other sites More sharing options...
iceman1575 Posted May 23, 2011 Author Report Share Posted May 23, 2011 (edited) Well, definitely made a difference. I got about 290 miles on a tank this fill up, maybe see if it was just a bad tank. Also check your PCV valve. I don't know about the L36's, but I know on the L67's they're crammed down in a corner where people like to forget about them until they fail. It's like a three dollar part. While you're at it a tune-up can help as well. Plugs wires filters etc etc. I noticed a bit of a gain with a CAI and mild exhaust as well, but if you're just looking to get back to stock mileage you won't have to go that far. 3.8's tend to sound cruddy with exhausts anyhow I'll take a look at the codes tomorrow & see if there's anything about a PCV valve. Done the plugs & wires about this time last year, and the air filter's fine...been wanting a CAI but don't have the cash to do it, or the poor man's CAI... I love the sound of my 3.8 on the stock exhaust. Has that low roar without being loud & annoying. Just gotta find me some chrome tips to put on mine. Edited May 23, 2011 by iceman1575 Quote POTATO! Link to comment Share on other sites More sharing options...
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