Duramax poor fuel mileage

The ECM does not care about the volume of fuel, it just wants to know the fuel rail pressure and regulates the pump by the FCA (fuel control actuator), to increase or decrease pressure. The dual fueler option is $2000-$3000 depending on if you choose a kit with or without a pump, and whether or not you want a modified CP3 or a stock one.

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Standard diesel fuel. Standard diesel fuel (sometimes called diesel oil) comes in two grades: Diesel #1 (or 1-D) and Diesel #2 (or 2-D). The higher the cetane number, the more volatile the fuel. Most diesel vehicles use fuel with a rating of 40 to 55. 2203 Spencerville Road Spencerville, MD 20868 USA Tel.: 301-421-9464 E-mail: [email protected] 2016 Duramax. 2016 Chevrolet Silverado 2500 HD LTZ 6.6L V8 DIESEL Automatic 6 Speed Crew Cab Pickup Added Nov 2016 • 293 Fuel-ups. Property of RobBryce
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Jul 13, 2016 · After a good break-in period, my mileage began climbing. It's now got 270K on it and frankly, mileage has become a reflection of just how heavy my right foot is! The LML, as I see advertised, is supposed to get better fuel mileage than its predecessors, but my LB7 will get (empty) ~21 mpg (highway) at 65-70 mph. Hi all, I recently purchased a 2016 2500 HD with the Duramax engine. My question is about fuel mileage. How accurate is the fuel mileage displayed in the Drivers Info Center? It says Im averaging around 15/16 mpg but when I go to fill up Im only getting about 13.8 mpg when I figure the gallons us...
2016-2020 Colorado/Canyon 2.8L Duramax DPF/EGR Delete tuning Our custom tuning includes the EFI Live AutoCal hand tool loaded with our custom Delete tuning for 2016-2020 Colorado/Canyon 2.8L Duramax. Product details: -Single power level that provides a gain of 40HP 70lbs-ft increase. -3-5 MPG increase in fuel mileage. -Less turbo lag.

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Well, one problem is, if its an 8.1, its not a diesel. The 8.1, or Vortec 8100, is a gas engine. The DuraMax is a 6.6 engine. There is usually not a priming system on a gas engine, because the fuel pumps will usually get it through the smaller filters used quick enough you dont need them. Upgrading your truck with a Duramileage Performance Module gives your engine a torque curve that was finely tuned to get the best fuel economy running both empty and towing. Call and Order Today the effective and affordable Duramileage Performance Module and effortlessly solve your poor fuel economy and power problems.
Duramax 6.6L Fuel Injector Feed Pipe Cylinders 1 & 8 Dieselogic now offers new injection lines for the GM 6.6L Duramax LB7 engine used in model year 2001 – 2004.5 applications. On the LB7 engine, it is common for corrosion to occur around the line and nut area near the injector connector inlet.

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The odor may be a result of leaking fuel, or of the vaporization of the fuel inside of the carburetor due to vapor lock. A vapor lock induced fuel smell may also be accompanied with performance issues such as misfires, a loss in power, and fuel economy. 2. Carburetor flooding, engine stalling, and hard starting I've got around 22,000 miles on mine in less than a year. No problems so far, change my own oil and filters I use fuel additive every other tank XPD and rev x oil additive every oil change. I have a leveling kit on with 265/65/17 falken atw3s, grille guard and will be adding rocksliders soon and possibly a sport bar. Jun 15, 2007 · TONAWANDA, N.Y. – General Motors Corp. will introduce a new, state-of-the-art 4.5L V-8 Duramax turbo-diesel that improves engine fuel efficiency by 25 percent, reduces CO2 emissions by 13 ...
Now, 2021 Chevy Silverado models equipped with 4WD and the Duramax diesel engine option post lower fuel economy ratings when compared to similarly equipped 2020 model year vehicles.

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Sep 14, 2009 · will a bad fuel filter on a car get bad mpg? and. will a bad fuel filter cause a car from starting? ````` Yes to both . Suggestion: Do some research . Fuel filter: Clean fuel is critical to engine life and performance. Fuel injectors have tiny openings which clog easily so filtering the fuel is the only way to prevent this. I would take the 7.8L Duramax. It's an in-line 6, the Isuzu 6HK-1TC. It is not related to the 6.6L Duramax V-8. The 7.8L has cylinder liners, a longer EPA rated service life than the C-7, and common rail injection instead of HEUI. It is a smoother running engine than the C-7. Cat parts are expensive, but so are Isuzu's, so there's no advantage ... Find GMC Sierra 2500hd at the lowest price . We have 48 listings for 2004 GMC Sierra 2500Hd Duramax Diesel, from $7,800
The 2011 GMC Sierra 2500 has 1 problems reported for poor fuel economy. Average failure mileage is 50 miles.
Sep 05, 2017 · Don’t rush to blame poor fuel economy on the EGR. Most of these symptoms could hint at different problems, as well, so get a professional diagnosis before you start changing parts. A mechanic can scan for trouble codes and inspect the related components to give the final word and next steps.

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Jul 31, 2020 · Cars employ sensors that monitor the fuel, ignition, transmission, and emissions systems – and often more – and they alert the driver when an issue has been detected. What Is OBD2? An OBD2 port is a universal interface in cars, typically found just underneath the steering column.
We use in house developed “NEO” Patented Fiber Optic test equipment to bring you fresh Duramax injectors that are designed to work perfectly with your 2004.5 - 2005 6.6L LLY Duramax engines. Dieselogic also sells accessory parts like glow plugs, injection pumps, fuel filters, turbo chargers, CAT fuel filter adapter kits and more.

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To his surprise (not mine) he was now getting 19.3 mpg. The mpg went up slightly on each tank: 18.1 on tank #1, 18.8 on tank #2 and finally 19.3 on tank #3. His truck started much easier and ran smoother. One thing I have determined in 22 years of testing Amsoil products and that is the fuel gauge and your calculator won’t lie to you. Aug 06, 2015 · The EPA fuel economy estimates have not been released yet, but expect the Duramax Colorado to achieve better than 30 mpg on the highway. Sales should begin by late summer 2015.
We came across common fuel injector issues with a 2001 Chevy Silverado Duramax 6.6L (LB7, 2001-2004) turbo. The engine was overheating, had a rough idle and suffered from poor acceleration. The vehicle was taken to a shop for diagnosis.

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The ECM does not care about the volume of fuel, it just wants to know the fuel rail pressure and regulates the pump by the FCA (fuel control actuator), to increase or decrease pressure. The dual fueler option is $2000-$3000 depending on if you choose a kit with or without a pump, and whether or not you want a modified CP3 or a stock one. Jun 08, 2018 · Duramax Diesel engine RPO codes include: LB7. VIN Digit: 1. Applications: 2001-Early 2004 Chevy Silverado and GMC Sierra, 2001-2005 Chevy Kodiak and GMC TopKick. Details: First version of the Duramax diesel. Known for fuel injectors leaking into the oil supply; see TSB #04039B.
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Poor Fuel Mileage. Jump to Latest Follow 1 - 16 of 16 Posts. M ... 2005 LLY Duramax, 3 Inch Lift on 305x18's 4 Inch MBRP Exhaust Straight Piped Air-Raid Intake, EGR Delete, PCV Re-route ... Wait until spring/summer and your mileage will go up a bunch without warm ups and bad fuel.

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DFS780 Diesel Fuel System for 2011-2016 GM Duramax LML (Part Time Kit - Built in Bypass for Stick Fuel System) (0) Reviews: Write first review Item #: 42-14022
This translates to a 12% difference in speedometer/odometer reporting. If this truck used to get 20mpg with 245’s, it will now report 17.6mpg on the same trip using the same fuel. Reasons for under-reporting of mileage and falsely reported poor mileage: 1. Over-sized tires that have not been corrected for in the vehicle’s on board computer 2.

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Mar 18, 2010 · This extra fuel combusts inside the exhaust system creating excess heat which burns the soot which has accumulated in the DPF. While on the surface this system seems pretty smart, the problem is that the excess fuel used for regeneration comes from your tank thus reducing your MPG significantly. Duramax ECM Programming History
Dec 17, 2018 · The LMM is no different, with its labyrinthine-like exhaust after treatment also contributing to poor fuel economy, diluted engine oil and reduced long-term engine longevity. In the aftermarket, cracked pistons remain common thanks to the LMM’s use of the same pistons employed in the LBZ.

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[Archive] Duramax 2001-2004 LB7, incl DSP custom OS.
fass fuel systems diesel lift pump 2001-2010 gm duramax 6.6l titanium signature series 165gph (ts c10 165g) A FASS Fuel Systems can be a beneficial upgrade for your GM Duramax 6.6L diesel engine, this is because your Duramax doesn’t come with a factory lift pump like other diesels.

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2019 Chevy Silverado: how a big, thirsty pickup gets more fuel-efficient Achates engine in Ford F-150 pickup targets 37 mpg, with Saudi oil company backing Share This Article: The ECM does not care about the volume of fuel, it just wants to know the fuel rail pressure and regulates the pump by the FCA (fuel control actuator), to increase or decrease pressure. The dual fueler option is $2000-$3000 depending on if you choose a kit with or without a pump, and whether or not you want a modified CP3 or a stock one.
Jan 05, 2020 · Your Duramax should have a fuel life monitor on it which is based on miles and time. I usually let my 2006 and now 2018 Duramax get to 33% life left which usually works out to be every 10k miles and once a year. Diesels are not made to sit around, you should consider trading it for a gas model.

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Keep your 2001-2007 GM 6.6L Duramax engine performance at its peak with the Bostech BTS012148 Mass Air Flow Sensor. When diagnosing poor running conditions, many overlook the Mass Air Flow (MAF) sensor. A dirty or failing MAF sensor can cause a decline in fuel economy, engine performance, and overall driveability.
The Duramax Engine. From 2001 to 2011, the Duramax engine has had a similar configuration, and with that, similar issues. According to Lind, there are common issues with the engine becoming starved for fuel. Because there is no factory lift pump to circulate fuel, the injection pump has to suck fuel from the tank and through the filter to run.

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Jul 17, 2019 · Bad Fuel Injector Symptoms: Chevy Silverado. The symptoms of bad fuel injectors are going to feel almost the same as a bad fuel pump or fuel filter. That’s why it’s important to check the fuel pressure at the rail before replacing injectors, otherwise you may end throwing good money after bad.
04 LB7 Duramax with a bad Fuel Pressure Regulator. A $200 fix the dealer misdiagnosed and quoted as a $3,000 repair.

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Feb 21, 2013 · The 03-04's get good fuel mileage also. I'd find an 03-04, put a decent clutch in it right off the bat, as a programmer of any kind will limit its life alot, and maybe a boost and egt gauge and your set.. Reliable power, you can tow with, and get good fuel economy. I am jealous of the duramaxes fuel economy, and interior. Horsepower Settings Switch: *Stock *30 HP - Heavy Tow *60 HP - Mileage and Medium Tow *90 HP - Mileage and Light Tow (Max 150 ft/lbs Torque) ORDER ONLINE 24/7 1-800-450-5333 Click to Call or Text 2011-2016 GM Duramax 6.6L LML PRO Performance Module BENEFITS OF UPGRADING:. Fuel Savings: Up to 15-20% improvement over stock ='s 100 more miles tank fuel; Proven: Ten's of Thousands Satisfied Customers!
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Dec 02, 2013 · Case in point: The 2nd generation 163hp 2.5L and 200hp 2.8L Duramax (MY14) four-bangers just introduced in Bangkok, Thailand. (GMs Thailand marketing numbers show the first generation in a 4×4 Colorado fuel economy at 25.57 mpg–and the new version is 6% better.)

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Jul 25, 2012 · Looks to me like either a leaking injector returning to much fuel, or a lack of fuel volume under load. 1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that, DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
Jan 14, 2008 · Looking to buy a 2008 Silverado Crew Cab 2500 HD. What have everyones experience been in fuel economy. Looking at the Duramax Diesel or the 6.0 ltr gas. have been hearing at least 6-7 mpg more with the diesel.

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05 Duramax lly loss of power and fuel economy I have an 05 Duramax lly, all stock, no programmers ever, or any other mods. It occasionally losses all power when you push on the accelerator, but it will idle and smoke then clear up and run.
I have a 2001 2500 HD duramax that has been having fuel problems. They have told me that the problem is that the injectors are bad and need replaced. We are not sure that is the problem though. The motor does not run any different than normal when at an idle or when starting. It does not sound like it misses at all.

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Jun 06, 2020 · The movement of the fuel inside the tank, and the process of fuel transfer under these conditions creates as much as 10% air/vapor within the fuel. Symptoms of air/vapor can be low horsepower, poor fuel mileage, excessive smoke, injector failure, hard starting, surging and rough running. If you are daily driving or going cross country, 100 EXTRA miles per tank of fuel adds up fast when it comes to money in your wallet. Stopping less to fuel up makes traveling more enjoyable and more affordable when you are saving $20 for every $100 in fuel. (up to 20% MPG increase) EMISSIONS DE-TUNING CAUSED YOUR POOR MILEAGE! Series: DURAMAX DENALI LIFTED W35" TOYO TIRES ON 22" WHEEL VIN: 1GT12UE87GF155771 Stock #: 5714 Condition: Used Mileage: 41,071 Exterior: White Interior: Black Body: Truck Transmission: Automatic Engine: 6.6L V8 OHV 16 DIESEL
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6. Decreased Gas Mileage. If you have a feeling that there is something wrong, checking your transmission fluid will help you test out your concerns. If the transmission fluid has changed from red to brown or yellow, this is a definite warning sign. If you notice varnish on the transmission dipstick, you may have a faulty transmission filter.

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For this install, I chose to test a fuel economy tune as well as a 100 hp sport/towing tune for my 2005 GMC. Follow along as we install a KD custom-tuned ECM and switch assembly for the LLY Duramax. A switch gives the driver the option of switching between two different tunes stored in the ECM.

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fass fuel systems diesel lift pump 2001-2010 gm duramax 6.6l titanium signature series 165gph (ts c10 165g) A FASS Fuel Systems can be a beneficial upgrade for your GM Duramax 6.6L diesel engine, this is because your Duramax doesn’t come with a factory lift pump like other diesels.

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Jun 06, 2007 · Clean fuel is very important, so changing your fuel filters at the recommended intervals is critical. Adding an aftermarket fuel filter or a FASS will also extend the life of your injectors. Identify which Duramax engine you have by the 8th digit in the VIN # Sep 15, 2009 · As the fuel quantity per cycle is increased, after-burning increases and results in incomplete combustion at the end of the expansion stroke, although air is still present. This implies the importance of good atomization. Poor injector condition or low fuel rail pressure leads to after-burning, poor economy and smoke.

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A dirty fuel filter may restrict the fuel system flow, or at least make it inconsistent, which can cause the vehicle to experience hard starting. This is more likely if the filter on the vehicle has never been changed. 2. Engine Performance Problems. Other symptoms of a bad fuel filter fall under the category of engine performance issues.
The 2011-2016 Duramax suffers from a high pressure fuel pump issue unique to this year range. Failure of this CP4 pump is usually catastrophic, causing instant contamination of the entire fuel system with metal particulates. Chances are, if you’re looking at this page, you’re well aware of the problem.

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Hand calculated was about 17 mpg, now with EFI 18-20 mpg. I'm not lifted and run 265 BFGs. Also remember, if not corrected, the tire size throws off the odometer, which therefore throws off the mileage calculations. With your lift and tires, I would expect around 15 mpg or less. Quickest way to kill mileage is big lifts and big offroad tires.

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All S&S products have a 20% restocking fee. Injectors and CP3 pumps carry a 1 year unlimited mileage warranty. Contact S&S for any warranty concerns. Any suspect hardware must be returned to S&S for evaluation, and will be repaired or replaced at S&S discretion. Improper usage, damage, and fuel contamination are not covered.

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Poor Fuel Mileage. Jump to Latest Follow ... 2005 LLY Duramax, 3 Inch Lift on 305x18's 4 Inch MBRP Exhaust Straight Piped Air-Raid Intake, EGR Delete, PCV Re-route

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